0001585521-21-000048 | 10-K | XBRL Viewer | Zoom Video Communications INC

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Cover - USD ($) $ in Millions	12 Months Ended
Cover - USD ($) $ in Millions	Jan. 31, 2021	Mar. 05, 2021	Jul. 31, 2020
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jan. 31, 2021
Current Fiscal Year End Date	--01-31
Document Transition Report	false
Entity File Number	001-38865
Entity Registrant Name	Zoom Video Communications, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	61-1648780
Entity Address, Address Line One	55 Almaden Boulevard
Entity Address, Address Line Two	6th Floor
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95113
City Area Code	(888)
Local Phone Number	799-9666
Title of 12(b) Security	Class A Common Stock, $0.001 par value per share
Trading Symbol	ZM
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 53,700
Documents Incorporated by Reference	Portions of the registrant's definitive Proxy Statement relating to the 2021 Annual Meeting of Stockholders are incorporated herein by references in Part III of this Annual Report on Form 10-K to the extent stated herein. Such Proxy Statement will be filed with the Securities and Exchange Commission within 120 days of the registrant's fiscal year ended January 31, 2021.
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001585521
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		234,240,582
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		59,473,463

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Current assets:
Cash and cash equivalents	$ 2,240,303	$ 283,134
Marketable securities	2,004,410	572,060
Accounts receivable, net of allowances of $36,844 and $7,634 as of January 31, 2021 and 2020, respectively	294,703	120,435
Deferred contract acquisition costs, current	136,630	44,885
Prepaid Expense and Other Assets, Current	116,819	75,008
Total current assets	4,792,865	1,095,522
Deferred contract acquisition costs, noncurrent	157,262	46,245
Property and equipment, net	149,924	57,138
Operating lease right-of-use assets	97,649	68,608
Goodwill	24,340	0
Other assets, noncurrent	75,953	22,332
Total assets	5,297,993	1,289,845
Current liabilities:
Accounts payable	8,664	1,596
Accrued expenses and other current liabilities	393,018	122,692
Deferred revenue, current	858,284	209,542
Total current liabilities	1,259,966	333,830
Deferred revenue, noncurrent	25,211	20,994
Operating lease liabilities, noncurrent	90,415	64,792
Other liabilities, noncurrent	61,634	36,286
Total liabilities	1,437,226	455,902
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock, $0.001 par value per share, 200,000,000 shares authorized as of January 31, 2021 and 2020; zero shares issued and outstanding as of January 31, 2021 and 2020	0	0
Common stock, $0.001 par value per share, 2,000,000,000 Class A shares authorized as of January 31, 2021 and 2020; 215,737,924 and 123,391,114 shares issued and outstanding as of January 31, 2021 and 2020, respectively; 300,000,000 Class B shares authorized as of January 31, 2021 and 2020; 77,811,299 and 155,336,747 shares issued and outstanding as of January 31, 2021 and 2020, respectively	292	277
Additional paid-in capital	3,187,168	832,705
Accumulated other comprehensive income	839	809
Retained earnings	672,468	152
Total stockholders’ equity	3,860,767	833,943
Total liabilities and stockholders’ equity	$ 5,297,993	$ 1,289,845

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Accounts receivable, allowances	$ 36,844	$ 7,634
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	200,000,000	200,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.001
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares issued (in shares)	215,737,924	123,391,114
Common stock, shares outstanding (in shares)	215,737,924	123,391,114
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.001
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	77,811,299	155,336,747
Common stock, shares outstanding (in shares)	77,811,299	155,336,747

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Income Statement [Abstract]
Revenue	$ 2,651,368	$ 622,658	$ 330,517
Cost of revenue	821,989	115,396	61,001
Gross profit	1,829,379	507,262	269,516
Operating expenses:
Research and development	164,080	67,079	33,014
Sales and marketing	684,904	340,646	185,821
General and administrative	320,547	86,841	44,514
Total operating expenses	1,169,531	494,566	263,349
Income from operations	659,848	12,696	6,167
Interest income and other, net	18,186	13,666	2,182
Total	678,034	26,362	8,349
Provision for income taxes	5,718	1,057	765
Net income	672,316	25,305	7,584
Undistributed earnings attributable to participating securities	(789)	(3,555)	(7,584)
Net income attributable to common stockholders	$ 671,527	$ 21,750	$ 0
Net income per share attributable to common stockholders:
Basic (in dollars per share)	$ 2.37	$ 0.09	$ 0.00
Diluted (in dollars per share)	$ 2.25	$ 0.09	$ 0.00
Weighted-average shares used in computing net income per share attributable to common stockholders:
Basic (in shares)	283,853,654	233,641,336	84,483,094
Diluted (in shares)	298,127,669	254,298,014	116,005,681

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 672,316	$ 25,305	$ 7,584
Other comprehensive income:
Unrealized gain on available-for-sale marketable securities, net of tax	30	944	396
Comprehensive income	$ 672,346	$ 26,249	$ 7,980

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive (Loss) Income	(Accumulated Deficit) Retained Earnings
Beginning balance (in shares) at Jan. 31, 2018	152,665,804
Beginning balance at Jan. 31, 2018	$ 159,552
Ending balance (in shares) at Jan. 31, 2019	152,665,804
Ending balance at Jan. 31, 2019	$ 159,552
Beginning balance (in shares) at Jan. 31, 2018		82,609,638
Beginning balance at Jan. 31, 2018	(26,671)	$ 80	$ 6,517	$ (531)	$ (32,737)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		7,717,797
Issuance of common stock upon exercise of stock options	2,311	$ 9	2,302
Stock-based compensation expense	8,941		8,941
Other comprehensive income	396			396
Net income	7,584				7,584
Ending balance (in shares) at Jan. 31, 2019		90,327,435
Ending balance at Jan. 31, 2019	(7,439)	$ 89	17,760	(135)	(25,153)
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of convertible preferred stock to common stock upon initial public offering	$ (159,552)
Ending balance (in shares) at Jan. 31, 2020	0
Ending balance at Jan. 31, 2020	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of convertible preferred stock to common stock upon initial public offering (in shares)		152,665,804
Conversion of convertible preferred stock to common stock upon initial public offering	159,552	$ 153	159,399
Conversion of convertible promissory notes and accrued interest to common stock upon initial public offering (in shares)		426,223
Conversion of convertible promissory notes and accrued interest to common stock upon initial public offering	15,344
Issuance of common stock, net of underwriting discounts and commissions and other offering costs (in shares)		15,819,646
Issuance of common stock, net of underwriting discounts and commissions and other offering costs	541,499	$ 16	541,483
Issuance of common stock upon exercise of stock options, net of repurchases and release of restricted stock units (in shares)		18,501,767
Issuance of common stock upon exercise of stock options, net of repurchases and release of restricted stock units	$ 9,771	$ 19	9,752
Issuance of common stock reserved for charitable donation (in shares)	500,000
Issuance of common stock for employee stock purchase plan (in shares)		490,268
Issuance of common stock for employee stock purchase plan	$ 15,482		15,482
Stock-based compensation expense	73,485		73,485
Other comprehensive income	944			944
Net income	25,305				25,305
Ending balance (in shares) at Jan. 31, 2020		278,731,143
Ending balance at Jan. 31, 2020	$ 833,943	$ 277	832,705	809	152
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of convertible preferred stock to common stock upon initial public offering (in shares)	(152,665,804)
Ending balance (in shares) at Jan. 31, 2021	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)	7,378,477	7,378,477
Issuance of common stock upon exercise of stock options	$ 29,107	$ 7	29,100
Issuance of common stock, net of underwriting discounts and commissions and other offering costs (in shares)		5,882,353
Issuance of common stock, net of underwriting discounts and commissions and other offering costs	1,979,544	$ 6	1,979,538
Issuance of common stock upon release of restricted stock units (in shares)		633,697
Issuance of common stock upon release of restricted stock units	1	$ 1
Issuance of common stock reserved for charitable donations	23,312		23,312
Issuance of common stock for employee stock purchase plan (in shares)		923,553
Issuance of common stock for employee stock purchase plan	38,433	$ 1	38,432
Stock-based compensation expense	284,081		284,081
Other comprehensive income	30			30
Net income	672,316				672,316
Ending balance (in shares) at Jan. 31, 2021		293,549,223
Ending balance at Jan. 31, 2021	$ 3,860,767	$ 292	$ 3,187,168	$ 839	$ 672,468

CONSOLIDATED STATEMENTS OF CASH FLOW - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Cash flows from operating activities:
Net income	$ 672,316	$ 25,305	$ 7,584
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	275,818	73,109	8,941
Amortization of deferred contract acquisition costs	104,306	37,101	20,839
Provision for accounts receivable allowances	32,007	6,370	1,953
Depreciation and amortization	28,857	16,449	7,008
Charitable donation of common stock	23,312		0
Non-cash operating lease cost	10,887	6,885	0
Other	3,822	(1,068)	37
Changes in operating assets and liabilities:
Accounts receivable	(219,039)	(64,715)	(41,040)
Prepaid expenses and other assets	(68,521)	(24,805)	(7,971)
Deferred contract acquisition costs	(307,068)	(72,714)	(45,769)
Accounts payable	3,481	(2,030)	832
Accrued expenses and other liabilities	251,654	51,179	27,407
Deferred revenue	665,724	106,286	71,511
Operating lease liabilities, net	(6,379)	(5,460)	0
Net cash provided by operating activities	1,471,177	151,892	51,332
Cash flows from investing activities:
Purchases of marketable securities	(2,056,470)	(800,228)	(78,016)
Maturities of marketable securities	580,795	343,554	68,747
Sales of marketable securities	36,897	0	0
Purchases of property and equipment	(79,972)	(38,084)	(28,432)
Cash paid for acquisition, net of cash acquired	(26,486)	0	0
Purchase of equity investment	(8,000)	(3,000)	0
Purchases of intangible assets	(5,843)	(141)	(2,018)
Purchase of convertible promissory note	(5,000)	0	0
Other	1,659	(1,569)	0
Net cash used in investing activities	(1,562,420)	(499,468)	(39,719)
Cash flows from financing activities:
Proceeds from follow-on public offering, net of underwriting discounts and commissions and other offering costs	1,979,206	0	0
Proceeds from issuance of common stock for employee stock purchase plan	38,433	15,482	0
Proceeds from exercise of stock options, net of repurchases	28,550	9,169	3,565
Proceeds from employee equity transactions to be remitted to employees and tax authorities, net	4,088	48,547	0
Proceeds from initial public offering and private placement, net of underwriting discounts and commissions and other offering costs	0	542,492	(939)
Proceeds from issuance of convertible promissory notes and derivatives	0	0	15,000
Principal payments on capital lease obligations	0	0
Principal payments on capital lease obligations			(92)
Net cash provided by financing activities	2,050,277	615,690	17,534
Net increase in cash, cash equivalents, and restricted cash	1,959,034	268,114	29,147
Cash, cash equivalents, and restricted cash—beginning of year	334,082	65,968	36,821
Cash, cash equivalents, and restricted cash—end of year	2,293,116	334,082	65,968
Supplemental disclosures of cash flow information
Cash paid for income taxes, net	3,181	1,070	214
Supplemental disclosures of non-cash investing and financing information
Purchase of equipment during the period included in accounts payable and accrued expenses	34,514	1,422	3,284
Vesting of early exercised stock options and restricted stock awards	558	725	277
Deferred offering costs, accrued but not paid	0	0	1,490
Reconciliation of cash, cash equivalents, and restricted cash within the consolidated balance sheets to the amounts shown in the consolidated statements of cash flows above:
Cash and cash equivalents	2,240,303	283,134	63,624
Total cash, cash equivalents, and restricted cash	2,293,116	65,968	36,821
Class B Common Stock
Cash flows from operating activities:
Net income	239,348	19,855	7,584
Supplemental disclosures of non-cash investing and financing information
Conversion of convertible preferred stock to Class B common stock upon initial public offering	0	159,552	0
Class A Common Stock
Cash flows from operating activities:
Net income	432,968	5,450	0
Supplemental disclosures of non-cash investing and financing information
Conversion of debt to Class A common stock	$ 0	$ 15,344	$ 0

Summary of Business and Significant Accounting Policies

12 Months Ended

Jan. 31, 2021

Accounting Policies [Abstract]

Summary of Business and Significant Accounting Policies

Description of Business

Zoom Video Communications, Inc. and its subsidiaries (collectively, “Zoom,” the “Company,” “we,” “us,” or “our”) provide a video-first unified communications platform that delivers happiness and fundamentally changes how people interact. We connect people through frictionless and secure video, phone, chat, and content sharing and enable face-to-face video experiences for thousands of people in a single meeting across disparate devices and locations. We were incorporated in the state of Delaware in April 2011, and are headquartered in San Jose, California.

Fiscal Year

Our fiscal year ends on January 31. References to fiscal year 2021, for example, refer to the fiscal year ended January 31, 2021.

Basis of Presentation

The accompanying consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and include the accounts of Zoom Video Communications, Inc., its subsidiaries, and a variable interest entity for which we are the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Significant items subject to such estimates and assumptions include, but are not limited to, the estimated expected benefit period for deferred contract acquisition costs, the allowance for credit losses, the useful lives of long-lived assets, the incremental borrowing rate for operating leases, stock-based compensation expense, sales and other tax liabilities, the fair value of marketable securities, equity investment, convertible promissory note, acquired intangible assets and goodwill, and the valuation of deferred income tax assets and uncertain tax positions. Actual results could differ from those estimates.

The COVID-19 pandemic has created, and may continue to create, significant uncertainty in macroeconomic conditions, and the extent of its impact on our operational and financial performance will depend on certain developments, including the duration and spread of the outbreak and the impact on our customers and our sales cycles. During the fiscal years ended January 31, 2021 and 2020, our estimates and assumptions required increased judgment and carried a higher degree of variability and volatility. As events continue to evolve and additional information becomes available, our estimates may change materially in future periods.

Concentration of Risks

Our financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, restricted cash, and accounts receivable. We maintain our cash, cash equivalents, marketable securities, and restricted cash with high-quality financial institutions with investment-grade ratings. A majority of the cash balances are with U.S. banks and are insured to the extent defined by the Federal Deposit Insurance Corporation.

No single customer accounted for more than 10% of accounts receivable at January 31, 2021 or 2020. No single customer accounted for 10% or more of total revenue during the fiscal years ended January 31, 2021, 2020, or 2019.

Cash, Cash Equivalents, and Restricted Cash

Cash and cash equivalents consist of cash in banks and highly liquid investments, primarily money market funds, purchased with an original maturity of three months or less.

Restricted cash consists of certificates of deposit collateralizing our operating leases, corporate credit cards, and cash from proceeds from international employees’ sales of our common stock, and is included in prepaid expenses and other current assets and other assets, noncurrent in the consolidated balance sheets.

As of January 31, 2021 and 2020, we had $50.5 million and $48.5 million, respectively, of cash from proceeds from international employees’ sales of our common stock. The amount is held in our bank account until it is remitted to the

employees and the tax authorities. Due to the restrictions on the use of the funds in the bank account, we have classified the amount as restricted cash included in prepaid expenses and other current assets, and a corresponding amount is included in accrued expenses and other current liabilities in the consolidated balance sheets.

Allowance for Credit Losses

We are exposed to credit losses primarily through our accounts receivable and investments in available-for-sale debt securities. See Note 3 for additional information related to our available-for-sale debt securities.

Accounts receivable, net

Accounts receivable are recorded for invoiced amounts and amounts for which revenue has been recognized, but not invoiced, net of allowances. Our short-term accounts receivable consist of the following:



	As of January 31, 2021

	(in thousands)
Accounts receivable, gross	$	331,547
Less: Allowance for credit losses	(20,500)
Less: Allowance for returns	(16,344)
Accounts receivable, net	$	294,703

We maintain an allowance for credit losses for expected uncollectible accounts receivable, which is recorded as an offset to accounts receivable, and changes in such are classified as general and administrative expense in the consolidated statements of operations. The allowance for credit losses is based on management’s estimate for expected credit losses for outstanding accounts receivable. We determine expected credit losses based on historical write-off experience, an analysis of the aging of outstanding receivables, customer payment patterns, the establishment of specific reserves for customers in an adverse financial condition, and adjust based upon our expectations of changes in macroeconomic conditions that may impact the collectibility of outstanding receivables, including noncurrent accounts receivable. We also consider current market conditions and reasonable and supportable forecasts of future economic conditions to inform adjustments to historical loss data. We reassess the adequacy of the allowance for credit losses each reporting period. Furthermore, the allowance for sales returns is recorded as an offset to accounts receivable, and changes to the allowance are classified as a reduction in revenue in the consolidated statements of operations. We estimate returns from sales to customers based on historical chargebacks and return rates.

For the fiscal year ended January 31, 2021, our assessment considered business and market disruptions caused by COVID-19 and estimates of credit and collectibility trends. The continued volatility in market conditions and evolving shifts in credit trends are difficult to predict, causing variability and volatility that may have a material impact on our allowance for credit losses in future periods. Below is a rollforward of our allowance for credit losses for the fiscal year ended January 31, 2021.




	(in thousands)
Balance as of January 31, 2020	$	5,150
Provision for credit losses	25,651
Write-offs	(10,301)
Balance as of January 31, 2021	$	20,500

Available-for-sale Investments

Available-for-sale investments consist primarily of high-grade commercial paper, agency bonds, corporate bonds, corporate and other debt securities, U.S. government agency securities, and treasury bills. We classify our marketable securities as available-for-sale at the time of purchase and reevaluate such classification at each balance sheet date. We may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, we classify our securities, including those with maturities beyond 12 months, as current assets in the consolidated balance sheets. We carry these securities at fair value and record unrealized gains and losses in accumulated other comprehensive income, which is reflected as a component of stockholders’ equity. We evaluate our securities with unrealized loss positions as to whether the declines in fair value were due to credit losses, and record the portion of impairment relating to the credit losses through allowance for credit losses limited to the amount that fair value was less than the amortized cost basis. Realized gains and losses from the sale of marketable securities are determined based on the specific identification method. Realized gains and losses are reported in interest income and other, net in the consolidated statements of operations.

Fair Value Measurements

Fair value is defined as the exchange price that would be received from the sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We measure financial assets and liabilities at fair value at each reporting period using a fair value hierarchy, which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value:

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Financial instruments consist of cash equivalents, restricted cash, marketable securities, accounts receivable, and accounts payable. Cash equivalents, restricted cash, and marketable securities are stated at fair value on a recurring basis. Accounts receivable and accounts payable are stated at their carrying value, which approximates fair value due to the short time to the expected receipt or payment date.

Property and Equipment, Net

Property and equipment, net, are stated at cost, less accumulated depreciation and amortization. Depreciation and amortization are calculated using the straight-line method over the estimated useful lives of the respective assets, determined to be three to five years. Leasehold improvements are amortized over the shorter of the remaining lease term or the estimated useful life of five years. Expenditures for maintenance and repairs are expensed as incurred. Significant improvements and betterments that substantially enhance the life of an asset are capitalized.

Software Development Costs

We capitalize certain development costs related to our unified communications platform during the application development stage as long as it is probable the project will be completed, and the software will be used to perform the function intended. Capitalized software development costs are recorded as part of property and equipment, net. Costs related to preliminary project activities and post-implementation activities are expensed as incurred. Capitalized software development costs are amortized on a straight-line basis over the software’s estimated useful life, which is generally three years, and are recorded in cost of revenue in the consolidated statements of operations. We evaluate the useful lives of these assets on an annual basis and test for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. We have capitalized $19.4 million, $3.1 million, and $2.5 million of software development costs during the fiscal years ended January 31, 2021, 2020, and 2019, respectively.

Leases

We adopted Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842) and applicable updates as of February 1, 2019, using the modified retrospective method of applying the new standard at the adoption date. Prior year comparative financial information was not recast under the new standard and continues to be presented under Accounting Standards Codification (“ASC”) 840.

All lease arrangements are generally recognized at lease commencement. Operating lease right-of-use (“ROU”) assets and operating lease liabilities are recognized at commencement. For short-term leases (an initial term of 12 months or less), an ROU asset and corresponding lease liability are not recorded and we record rent expense in our consolidated statements of operations on a straight-line basis over the lease term and record variable lease payments as incurred. ROU assets represent our right to use an underlying asset during the reasonably certain lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Operating lease ROU assets and liabilities are recognized at the commencement date based on the present value of fixed payments not yet paid over the lease term. We use our incremental borrowing rate based on the information available at the commencement date in determining the lease liabilities as our leases generally do not provide an implicit rate. Our incremental borrowing rate is estimated to approximate the interest rate on a collateralized basis with similar terms and payments, in an economic environment where the leased asset is located. ROU assets also include any initial direct costs incurred and any lease payments made at or before the lease commencement date, less lease

incentives received. We reassess the lease term if and when a significant event or change in circumstances occurs within our control. We currently do not have any finance leases.

Impairment of Long-Lived Assets

We evaluate long-lived assets or asset groups for impairment whenever events indicate that the carrying value of an asset or asset group may not be recoverable based on expected future cash flows attributable to that asset or asset group. Recoverability of assets held and used is measured by comparing the carrying amount of an asset or an asset group to estimated undiscounted future net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset or asset group exceeds estimated undiscounted future cash flows, then an impairment charge would be recognized based on the excess of the carrying amount of the asset or asset group over its fair value. Assets to be disposed of are reported at the lower of their carrying amount or fair value, less costs to sell. There were no impairment charges recognized related to long-lived assets during the fiscal years ended January 31, 2021, 2020, or 2019.

Business Combinations

We account for our business combinations using the acquisition method of accounting, which requires, among other things, allocation of the fair value of purchase consideration to the tangible and intangible assets acquired and liabilities assumed at their estimated fair values on the acquisition date. The excess of the fair value of purchase consideration over the values of these identifiable assets and liabilities is recorded as goodwill. When determining the fair value of assets acquired and liabilities assumed, we make estimates and assumptions, especially with respect to intangible assets. Our estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates. During the measurement period, not to exceed one year from the date of acquisition, we may record adjustments to the assets acquired and liabilities assumed, with a corresponding offset to goodwill if new information is obtained related to facts and circumstances that existed as of the acquisition date. After the measurement period, any subsequent adjustments are reflected in the consolidated statements of operations. Acquisition costs, such as legal and consulting fees, are expensed as incurred.

Uncertain tax positions and tax-related valuation allowances are initially established in connection with a business combination as of the acquisition date. We continue to collect information and reevaluate these estimates and assumptions quarterly. We will record any adjustments to our preliminary estimates to goodwill, provided that it is within the one-year measurement period.

Goodwill and Intangible Assets

Goodwill amounts are not amortized, but rather tested for impairment at least annually or more often if circumstances indicate that the carrying value may not be recoverable. Goodwill is considered impaired if the carrying value of the reporting unit exceeds its fair value. We have one reporting unit and as a result, goodwill has been assigned to the single reporting unit. We conducted our annual impairment test of goodwill in the fourth quarter of fiscal year 2021 and determined that no adjustment to the carrying value of goodwill was required.

Intangible assets consist of acquired identifiable intangible assets resulting from business combinations, as well as other intangible assets purchased outside of a business combination, such as domains and intellectual property addresses. Finite-lived intangible assets are initially recorded at fair value and are amortized on a straight-line basis over their estimated useful lives. Amortization expense of developed technology is recorded within cost of revenue in the consolidated statements of operations. We routinely evaluate the estimated remaining useful lives of our finite-lived intangible assets and whether events or changes in circumstances warrant a revision to the remaining period of amortization. Indefinite-lived intangible assets are recorded at fair value and are not amortized. We review the useful lives of indefinite-lived intangible assets each reporting period to determine whether events and circumstances continue to support the indefinite useful life classification. If we determine that the life of an intangible asset is no longer indefinite, that asset would be tested for impairment and amortized prospectively over its estimated remaining useful life. There were no impairment charges to acquired intangible assets during the fiscal year ended January 31, 2021.

Revenue Recognition

We derive our revenue primarily from subscription agreements with customers for access to our unified communications platform and services. We also provide other services, which include professional services, consulting services, and online event hosting, which were immaterial to our consolidated financial statements. Revenue is recognized when a customer obtains control of promised services. The amount of revenue recognized reflects the consideration that we expect to receive in exchange for these services. We determine revenue recognition through the following steps:

1.Identification of the contract, or contracts, with the customer

We determine a contract with a customer to exist when the contract is approved, each party’s rights regarding the services to be transferred can be identified, the payment terms for the services can be identified, the customer has the ability and intent to pay, and the contract has commercial substance. At contract inception, we will evaluate whether two or more contracts should be combined and accounted for as a single contract and whether the combined or single contract includes more than one performance obligation. We apply judgment in determining the customer’s ability and intent to pay, which is based on a variety of factors, including the customer’s historical payment experience or, in the case of a new customer, credit and financial information pertaining to the customer.

2.Identification of the performance obligations in the contract

Performance obligations committed in a contract are identified based on the services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the service either on its own or together with other resources that are readily available from third parties or from us, and are distinct in the context of the contract, whereby the transfer of the services or products is separately identifiable from other promises in the contract. Promised services or products under which both of these two criteria are not met are recognized as a combined, single performance obligation. Our performance obligations primarily relate to access to our unified communications platform, which consists of one or more software-based services. Our customers do not have the ability to take possession of our software, and through access to our platform, we provide a series of distinct software-based services that are satisfied over the term of the subscription.

3.Determination of the transaction price

The transaction price is determined based on the consideration to which we expect to be entitled in exchange for transferring services to the customer. Variable consideration is included in the transaction price if, in our judgment, it is probable that a significant future reversal of cumulative revenue recognized under the contract will not occur. None of our contracts contain a significant financing component. Revenue is recognized net of any taxes collected from customers, which are subsequently remitted to governmental entities (e.g., sales and other indirect taxes).

Our unified communications platform and related services are typically warranted to perform in a professional manner that will comply with the terms of the subscription agreements. In addition, we include service-level commitments to our customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that we fail to meet those service levels. These credits represent a form of variable consideration. We have not provided any material refunds related to these agreements in the consolidated financial statements during the periods presented.

4.Allocation of the transaction price to the performance obligations in the contract

Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on each performance obligation’s relative standalone selling price. Our contracts with multiple performance obligations are generally sold over the same subscription term and have the same pattern of transfer to the customer, and so they are accounted for as one combined performance obligation in the context of the contract. Accordingly, the transaction price is allocated to this single performance obligation.

5.Recognition of the revenue when, or as, a performance obligation is satisfied

Revenue is recognized at the time the related performance obligation is satisfied by transferring the control of the promised service to a customer. Revenue is recognized in an amount that reflects the consideration that we expect to receive in exchange for those services. Fees for access to our unified communications platform and related services are subscription revenue and are considered one performance obligation, and the related revenue is recognized ratably over the subscription period as we satisfy the performance obligation.

Professional services are time-based arrangements and revenue is recognized as these services are performed. Fees for services represent less than 2% of total revenue during the periods presented.

Cost of Revenue

Cost of revenue primarily consists of costs related to hosting our unified communications platform and providing general operating support services to our customers. These costs are composed of co-located data center costs, third-party cloud hosting costs, integrated third-party PSTN services, personnel-related expenses, amortization of capitalized software development costs and acquired intangible assets, royalty payments, and allocated overhead costs. Indirect overhead costs associated with corporate facilities and related depreciation is allocated to cost of revenue and operating expenses based on applicable headcount.

Research and Development

Research and development costs include personnel-related expenses associated with our engineering personnel and consultants responsible for the design, development, and testing of our unified communications platform, depreciation of equipment used in research and development, and allocated overhead costs. Research and development costs are expensed as incurred.

Advertising Costs

Advertising costs are expensed as incurred in sales and marketing expense and amounted to $34.8 million, $42.0 million, and $36.1 million for the fiscal years ended January 31, 2021, 2020, and 2019, respectively.

Stock-Based Compensation

Stock-based compensation expense related to stock awards (including stock options, restricted stock awards (“RSAs”), RSUs, and ESPP) is measured based on the fair value of the awards granted and recognized as an expense on a straight-line basis over the requisite service period.

The fair value of each option and ESPP award is estimated on the grant date using the Black-Scholes option pricing model. The Black-Scholes option pricing model requires the input of highly subjective assumptions, including the fair value of the underlying common stock, the expected term of the award, the expected volatility of the price of our common stock, risk-free interest rates, and the expected dividend yield of our common stock.

The fair value of each RSA and RSU award is based on the fair value of the underlying common stock as of the grant date.

The assumptions used to determine the fair value of the stock awards represent management’s best estimates. These estimates involve inherent uncertainties and the application of management’s judgment. We account for forfeitures as they occur instead of estimating the number of awards expected to be forfeited.

Foreign Currency

The functional currency of our foreign subsidiaries is the U.S. dollar. Accordingly, monetary assets and liabilities of our foreign subsidiaries are remeasured into U.S. dollars at the exchange rates in effect at the reporting date, non-monetary assets and liabilities are remeasured at historical rates, and revenue and expenses are remeasured at average exchange rates in effect during each reporting period. Foreign currency related gains and losses have been immaterial during the periods presented.

Income Taxes

We use the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial reporting and the tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse.

Deferred tax assets are evaluated for future realization and reduced by a valuation allowance to the extent we believe it is more likely than not that they will not be realized. We consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, carryback potential if permitted under the tax law, and results of recent operations.

We record uncertain tax positions in accordance with ASC 740, Income Taxes on the basis of a two-step process in which (1) we determine whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority. We consider many factors when evaluating our uncertain tax positions, which involve significant judgment and may require periodic adjustments. The resolution of these uncertain tax positions in a manner inconsistent with management's expectations could have a material impact on our consolidated financial statements. We recognize interest and penalties related to uncertain tax positions as a component of our provision for income taxes. Accrued interest and penalties are included with the related tax liability.

Net Income Per Share Attributable to Common Stockholders

We calculate our net income per share attributable to Class A and Class B common stock using the two-class method required for companies with participating securities. We consider our convertible preferred stock and unvested common stock,

which includes early exercised stock options and RSAs, to be participating securities as holders of such securities have non-forfeitable dividend rights in the event of our declaration of a dividend for shares of common stock.

Distributed and undistributed earnings allocated to participating securities are subtracted from net income in determining net income attributable to common stockholders. Basic net income per share is computed by dividing net income attributable to common stockholders by the weighted-average number of shares of our Class A and Class B common stock outstanding.

The diluted net income per share attributable to common stockholders is computed by giving effect to all dilutive securities. Diluted net income per share attributable to common stockholders is computed by dividing the resulting net income attributable to common stockholders by the weighted-average number of fully diluted common shares outstanding.

Segment Information

We operate in one operating segment. Operating segments are defined as components of an enterprise about which separate financial information is evaluated regularly by the chief operating decision maker, who is our Chief Executive Officer (“CEO”), in deciding how to allocate resources and assessing performance. Our chief operating decision maker allocates resources and assesses performance based upon consolidated financial information.

Revenue by geographical region can be found in the revenue recognition disclosures in Note 2 below. The following table presents our property and equipment, net of depreciation and amortization, by geographic region:


	As of January 31,
	2021		2020

	(in thousands)
Americas	$	138,093	$	48,519
APAC	10,033		7,464
EMEA	1,798		1,155
Total property and equipment, net	$	149,924	$	57,138

Recently Adopted Accounting Pronouncements

In June 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which was subsequently amended by ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, in November 2018. Subsequently, the FASB issued ASU No. 2019-04, ASU No. 2019-05, ASU No. 2019-10, and ASU No. 2019-11 to provide additional guidance on the credit losses standard. ASU No. 2016-13 and the related updates replace the existing incurred loss impairment model with an expected credit loss model, and requires a financial asset measured at amortized cost to be presented at the net amount expected to be collected. We adopted the standard as of February 1, 2020, using the modified retrospective method of applying the new standard at the adoption date. Our adoption did not result in any cumulative effect adjustment in our consolidated financial statements upon adoption as of February 1, 2020.

In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. The amendment aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). We adopted ASU No. 2018-15, prospectively, as of February 1, 2020, and our adoption did not have a material impact on the consolidated financial statements.

Revenue Recognition

12 Months Ended

Jan. 31, 2021

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Disaggregation of Revenue

The following table summarizes revenue by region based on the billing address of customers:


	Year Ended January 31,
		2021		2020				2019
				Amount		Percentage of Revenue		Amount		Percentage of Revenue		Amount		Percentage of Revenue

			(in thousands, except percentages)
Americas				$	1,831,694	69	%	$	500,622	81	%	$	270,132	82	%
APAC				332,844		13		51,152		8		27,720		8
EMEA				486,830		18		70,884		11		32,665		10
Total				$	2,651,368	100	%	$	622,658	100	%	$	330,517	100	%

Contract Balances

We receive payments from customers based on a billing schedule as established in our customer contracts. Accounts receivable are recorded when we contractually have the right to consideration. In some arrangements, a right to consideration for our performance under the customer contract may occur before invoicing to the customer, resulting in an unbilled accounts receivable. The amount of unbilled accounts receivable included within accounts receivable, net of allowances in the consolidated balance sheets was $24.6 million and $12.5 million as of January 31, 2021 and 2020, respectively.

Contract liabilities consist of deferred revenue. Revenue is deferred when we have the right to invoice in advance of performance under a customer contract. The current portion of deferred revenue balances is recognized over the next 12 months. The amount of revenue recognized during the fiscal years ended January 31, 2021, 2020, and 2019 that was included in deferred revenue at the beginning of each period was $222.0 million, $119.1 million, and $50.3 million, respectively.

Remaining Performance Obligation

The terms of our subscription agreements are monthly, annual, and multiyear and we may bill for the full term in advance or on an annual, quarterly, or monthly basis, depending on the billing terms with customers. As of January 31, 2021, the aggregate amount of the transaction price allocated to our remaining performance obligations was $1,750.9 million, which consists of both billed consideration in the amount of $883.5 million and unbilled consideration in the amount of $867.4 million that we expect to recognize as revenue. We expect to recognize 70% of our remaining performance obligations as revenue over the next 12 months and the remainder thereafter.

Cost to Obtain a Contract

We primarily capitalize sales commissions and associated payroll taxes paid to internal sales personnel that are incremental costs from the acquisition of customer contracts. These costs are recorded as deferred contract acquisition costs in the consolidated balance sheets. We determine whether costs should be deferred based on our sales compensation plans and if the commissions are incremental and would not have occurred absent the customer contract.

Sales commissions paid upon the initial acquisition of a customer contract are amortized over an estimated period of benefit of three years, which is typically greater than the contractual terms of the customer contracts. We do not pay sales commissions upon contract renewal. Amortization is recognized on a straight-line basis commensurate with the pattern of revenue recognition. We determine the period of benefit for commissions paid for the acquisition of the initial customer contract by taking into consideration the initial estimated customer life and the technological life of our unified communications platform and related significant features. Amortization of deferred contract acquisition costs is included in sales and marketing expense in the consolidated statements of operations.

We periodically review these deferred contract acquisition costs to determine whether events or changes in circumstances have occurred that could impact the period of benefit. There were no impairment losses recorded during the periods presented.

The following table represents a rollforward of deferred contract acquisition costs:


	Year Ended January 31,
	2021		2020

	(in thousands)
Beginning balance	$	91,130	$	55,516
Additions to deferred contract acquisition costs	307,068		72,715
Amortization of deferred contract acquisition costs	(104,306)		(37,101)
Ending balance	$	293,892	$	91,130
Deferred contract acquisition costs, current (to be amortized in next 12 months)	$	136,630	$	44,885
Deferred contract acquisition costs, noncurrent	157,262		46,245
Total deferred contract acquisition costs	$	293,892	$	91,130

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

+ Details

Marketable Securities

12 Months Ended

Jan. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

As of January 31, 2021 and 2020, our marketable securities consisted of the following:


	As of January 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

	(in thousands)





Commercial paper	$	26,222	$	—	$	—	$	26,222
Agency bonds	461,335		79		(49)		461,365
Corporate and other debt securities	465,207		1,113		(64)		466,256
U.S. government agency securities	834,894		28		(257)		834,665
Treasury bills	215,902		6		(6)		215,902
Marketable securities	$	2,003,560	$	1,226	$	(376)	$	2,004,410


	As of January 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

	(in thousands)


Commercial paper	$	37,894	$	—	$	—	$	37,894
Agency bonds	141,157		49		(43)		141,163
Corporate and other debt securities	320,407		775		(16)		321,166
U.S. government agency securities	71,794		45		(2)		71,837

Marketable securities	$	571,252	$	869	$	(61)	$	572,060

We review the individual securities that have unrealized losses on a regular basis to evaluate whether or not any security has experienced, or is expected to experience, credit losses resulting in the decline in fair value. We evaluate, among other factors, whether we have the intention to sell any of these marketable securities and whether it is more likely than not that we will be required to sell any of them before recovery of the amortized cost basis. We have not recorded an allowance for credit losses, as we believe any such losses would be immaterial based on the high-grade credit rating for each of our marketable securities as of the end of each fiscal year. There were no material realized gains or losses from available-for-sale securities that were reclassified out of accumulated other comprehensive income for the fiscal years ended January 31, 2021, 2020, and 2019.

The following table presents the contractual maturities of our marketable securities as of January 31, 2021 and 2020:


	As of January 31,
	2021		2020

	(in thousands)
Less than one year	$	1,017,048	$	315,900
Due in one to five years	987,362		256,160
Total	$	2,004,410	$	572,060

Fair Value Measurements

12 Months Ended

Jan. 31, 2021

Fair Value Disclosures [Abstract]

Fair Value Measurements

The following tables present information about our financial instruments that are measured at fair value on a recurring basis and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value:


	As of January 31, 2021
	Fair Value		Level 1		Level 2		Level 3

	(in thousands)
Financial Assets:
Money market funds	$	958,357	$	958,357	$	—	$	—
Treasury bills	618,498		—		618,498		—


Cash equivalents	1,576,855		958,357		618,498		—
Commercial paper	26,222		—		26,222		—
Agency bonds	461,365		—		461,365		—
Corporate and other debt securities	466,256		—		466,256		—
U.S. government agency securities	834,665		—		834,665		—
Treasury bills	215,902		—		215,902		—
Marketable securities	2,004,410		—		2,004,410		—
Certificate of deposit included in prepaid expenses and other current assets	100		—		100		—

Certificates of deposit included in other assets, noncurrent	2,238		—		2,238		—

Convertible note included in other assets, noncurrent	5,130		—		—		5,130
Total financial assets	$	3,588,733	$	958,357	$	2,625,246	$	5,130


	As of January 31, 2020
	Fair Value		Level 1		Level 2		Level 3

	(in thousands)
Financial Assets:
Money market funds	$	96,486	$	96,486	$	—	$	—
Commercial paper	4,994		—		4,994		—

Agency bonds	9,999		—		9,999		—
Cash equivalents	111,479		96,486		14,993		—
Commercial paper	37,894		—		37,894		—
Agency bonds	141,163		—		141,163		—
Corporate and other debt securities	321,166		—		321,166		—
U.S. government agency securities	71,837		—		71,837		—

Marketable securities	572,060		—		572,060		—
Certificate of deposit included in prepaid expenses and other current assets	100		—		100		—

Certificates of deposit included in other assets, noncurrent	2,301		—		2,301		—

Total financial assets	$	685,940	$	96,486	$	589,454	$	—

We classify our highly liquid money market funds within Level 1 of the fair value hierarchy because they are valued based on quoted market prices in active markets. We classify our commercial paper, agency bonds, corporate and other debt securities, U.S. government agency securities, treasury bills, and certificates of deposit within Level 2 because they are valued using inputs other than quoted prices that are directly or indirectly observable in the market, including readily available pricing sources for the identical underlying security, which may not be actively traded. We classify the convertible note as Level 3 due to the lack of relevant observable market data over fair value inputs, such as the probability weighting of the various scenarios that can impact settlement of the arrangement.

We hold a non-marketable equity investment in a private company in the business of designing and developing video communications hardware. We do not have a controlling financial interest in the investee nor the ability to exercise significant influence over the operating and financial policies of the investee. We have elected to measure this investment, which does not have a readily determinable fair value, at its cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer (i.e., using the measurement alternative). As of January 31, 2021 and 2020, the carrying amount of the equity investment was $13.5 million and $3.0 million, respectively. We classify the equity investment as Level 3 within the fair value hierarchy only if an impairment or observable adjustment is recognized during the period, as it is based on an observable transaction price at the transaction date and other unobservable inputs, such as volatility.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Business Combinations	12 Months Ended
Business Combinations	Jan. 31, 2021
Business Combinations [Abstract]
Business Combinations	Business Combinations On May 7, 2020, we acquired 100% of the issued and outstanding share capital of Keybase, Inc. (“Keybase”), a secure messaging and file-sharing company, for purchase consideration of $42.9 million in cash. The acquisition helps us strengthen the security of our video communications platform by providing end-to-end encryption expertise. The acquisition has been accounted for as a business combination. In allocating the purchase consideration, $24.3 million was attributed to goodwill, $3.3 million to intangible assets, and $15.3 million to other net assets acquired primarily consisting of cash and cash equivalents of $16.4 million. The goodwill amount represents synergies related to our existing products expected to be realized from the acquisition and assembled workforce. The associated goodwill is not deductible for tax purposes. Acquired intangible assets consisted of developed technology with an estimated useful life of five years. The developed technology had a remaining useful life of 4.3 years as of January 31, 2021, and is amortized using the straight-line method over its estimated useful life. Not included in the purchase consideration, we also entered into holdback agreements with certain employees for $20.0 million in cash payments, which are subject to such employees’ continued service with us. The holdback amount of $20.0 million will be treated as compensation for research and development over the required service period ranging from one to three years. Transaction costs incurred in connection with the acquisition were immaterial. The results of operations of Keybase have been included in our consolidated financial statements from the date of the acquisition. Pro forma and historical results of operations of Keybase have not been presented, as the results do not have a material effect on any of the periods presented in our consolidated statements of operations.

Balance Sheet Components

12 Months Ended

Jan. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Balance Sheet Components

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Prepaid expenses	60,702		22,320
Restricted cash from international employee stock sales	50,475		48,547
Other	5,642		4,141
Prepaid expenses and other current assets	$	116,819	$	75,008

Property and Equipment, Net

Property and equipment consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Computer and office equipment	$	137,445	$	51,375
Software	36,216		10,855
Leasehold improvements	23,593		18,215
Furniture and fixtures	4,625		3,949
Property and equipment, gross	201,879		84,394
Less: accumulated depreciation and amortization	(51,955)		(27,256)
Property and equipment, net	$	149,924	$	57,138

Depreciation and amortization expense was $28.4 million, $16.4 million, and $7.0 million for the fiscal years ended January 31, 2021, 2020, and 2019, respectively.

Other Assets, Noncurrent

Other assets, noncurrent consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Accounts receivable, noncurrent	$	28,008	$	9,011
Equity investment	13,538		3,000
Prepaid expense, noncurrent	12,386		2,945
Indefinite-lived intangible assets	8,002		2,159

Convertible note	5,130		—
Intangible assets subject to amortization, net	2,814		—
Other	6,075		5,217
Other assets, noncurrent	$	75,953	$	22,332

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Accrued expenses	$	157,167	$	17,475

Accrued compensation and benefits	118,640		36,732
Proceeds from employee equity transactions to be remitted to employees and tax authorities	54,174		49,287
Sales and other tax liabilities	27,453		3,774
Customer deposit liabilities	13,050		3,414
Operating lease liabilities, current	15,601		7,675

Other	6,933		4,335
Accrued expenses and other current liabilities	$	393,018	$	122,692

Other Liabilities, Noncurrent

Other liabilities, noncurrent consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Sales and other tax liabilities	$	58,133	$	33,957



Other	3,501		2,329
Other liabilities, noncurrent	$	61,634	$	36,286

Operating Leases

12 Months Ended

Jan. 31, 2021

Leases [Abstract]

Operating Leases

Operating LeasesWe have entered into various operating lease agreements for office space, with remaining contractual periods of up to 9 years. We also enter into equipment operating lease agreements related to our HaaS offering. As a practical expedient, we account for HaaS with customers as a combined performance obligation with the right to access our unified communications platform under ASC 606, Revenue from Contracts with Customers. HaaS was immaterial to our consolidated financial statements. Many of our leases contain one or more options to extend. As leases approach maturity, we consider various factors such as market conditions and the terms of any renewal options that may exist to determine whether we are reasonably certain to exercise the options to extend the lease. Operating lease expense for the fiscal years ended January 31, 2021 and 2020 was $14.5 million and $9.7 million, respectively, excluding short-term lease costs, variable lease costs, and sublease income, each of which was immaterial for the fiscal years ended January 31, 2021 and 2020. Rent expense was $7.2 million for the fiscal year ended January 31, 2019, under Topic 840.

Supplemental balance sheet information related to operating leases was as follows:


	As of January 31,
	2021			2020
	(in thousands)
Reported as:
Assets:
Operating lease right-of-use assets	$	97,649		$	68,608
Liabilities:
Accrued expenses and other current liabilities	$	15,601		$	7,675
Operating lease liabilities, noncurrent	90,415			64,792
Total operating lease liabilities	$	106,016		$	72,467

Weighted average remaining lease term	6.1 years			7.5 years
Weighted average discount rate	4.5		%	5.1		%

Supplemental cash flow and other information related to operating leases was as follows:


	Year Ended January 31,
	2021		2020
	(in thousands)
Cash payments included in the measurement of our operating lease liabilities	$	13,717	$	9,774
Operating lease right-of-use assets recognized in exchange for new operating lease obligations	$	39,918	$	34,993

As of January 31, 2021, the future minimum lease payments included in the measurement of our operating lease liabilities are as follows:


	As of January 31, 2021
	(in thousands)
Year Ending January 31,
2022	$	19,949
2023	21,313
2024	20,310
2025	20,216
2026	15,384
Thereafter	24,808
Total operating lease payments	$	121,980
Less: imputed interest	(15,964)
Total operating lease liabilities	$	106,016

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Jan. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Non-cancelable Purchase Obligations In the normal course of business, we enter into non-cancelable purchase commitments with various parties to purchase primarily software-based services. As of January 31, 2021, we had outstanding non-cancelable purchase obligations with a term of 12 months or longer of $498.6 million. License Agreement In May 2020, we entered into a license agreement with MPEGLA to obtain the rights for future use of licensed intellectual property in exchange for periodic royalty payments. In connection with the license agreement, we made an initial royalty payment of $9.8 million to use the technology until December 31, 2020 and we made an additional payment of $9.8 million in the fourth quarter of fiscal year 2021 to use the technology until December 31, 2021. Both payments were amortized in cost of revenue on a straight-line basis in our consolidated statements of operations. For the fiscal year ended January 31, 2021, we recorded $10.6 million of such costs. In addition, we made a one-time payment of $9.8 million for past use, which was recorded in general and administrative expenses in our consolidated statements of operations for the fiscal year ended January 31, 2021. Indemnifications and Contingency Our agreements with certain larger customers include certain provisions for indemnifying customers against liabilities if our services infringe a third party’s intellectual property rights. It is not possible to determine the maximum potential amount under these indemnification obligations due to the limited history of prior indemnification claims and the unique facts and circumstances that may be involved in each particular agreement. To date, we have not incurred any material costs as a result of such provisions and have not accrued any liabilities related to such obligations in our consolidated financial statements. In addition, we have indemnification agreements with our directors and our executive officers that require us, among other things, to indemnify our directors and executive officers for costs associated with any fees, expenses, judgments, fines, and settlement amounts incurred by any of those persons in any action or proceeding to which any of those persons is, or is threatened to be, made a party by reason of the person’s service as a director or officer, including any action by us, arising out of that person’s services as our director or officer or that person’s services provided to any other company or enterprise at our request. We maintain director and officer insurance coverage that may enable us to recover a portion of any future indemnification amounts paid. To date, there have been no claims under any of our directors’ and executive officers’ indemnification provisions. Sales and Other Tax Liabilities We conduct operations in many tax jurisdictions. In many jurisdictions, non-income-based taxes, such as sales and use tax and other indirect taxes, are assessed on our operations. Although we are diligent in collecting and remitting such taxes, there is uncertainty as to what constitutes sufficient presence for a jurisdiction to levy taxes, fees, and surcharges for sales made over the Internet. As of January 31, 2021 and 2020, we recorded sales and other tax liabilities of $85.6 million and $37.7 million, respectively, of which $27.5 million and $3.7 million are included in accrued expenses and other current liabilities, respectively, and $58.1 million and $34.0 million are included in other liabilities, noncurrent, respectively, in our consolidated balance sheets, based on our best estimate of the probable liability for the loss contingency incurred as of those dates. Our estimate of a probable outcome under the loss contingency is based on analysis of our sales and marketing activities, revenue subject to sales tax, and applicable regulations in applicable jurisdictions in each period. No significant adjustments to the sales and other tax liabilities have been recognized in the accompanying consolidated financial statements for changes to the assumptions underlying the estimate; however, changes in our assumptions may occur in the future as we obtain new information, which can result in adjustments to the recorded liability. Other Contingencies Our platform and associated products are subject to various restrictions under U.S. export control and sanctions laws and regulations, including the U.S. Department of Commerce’s EAR and various economic and trade sanctions regulations administered by the U.S. Treasury Department’s Office of Foreign Assets Controls (“OFAC”). The U.S. export control laws and U.S. economic sanctions laws include restrictions or prohibitions on the sale or supply of certain products and services to U.S. embargoed or sanctioned countries, governments, persons, and entities, and also require authorization for the export of certain encryption items. In addition, various countries regulate the import of certain encryption technology, including through import permitting and licensing requirements and have enacted or could enact laws that could limit our ability to distribute our platform or could limit our hosts’ ability to implement our platform in those countries. Although we take precautions to prevent our platform and associated products from being accessed or used in violation of such laws, we have inadvertently allowed our platform and associated products to be accessed or used by some customers in apparent violation of U.S. economic sanction laws. In addition, we may have inadvertently made our software products available to some customers, including users in embargoed or sanctioned countries, in apparent violation of the EAR. As a result, we have submitted initial and final voluntary self-disclosures concerning potential violations of U.S. sanctions and export control laws and regulations to the OFAC and the U.S. Department of Commerce’s BIS. In June 2019, OFAC and BIS issued us warning letters as their final enforcement responses to these potential violations, but no fines or penalties were assessed. If we are found to be in violation of U.S. economic sanctions or export control laws in the future, it could result in fines and penalties. In June 2020 we received a grand jury subpoena from the Department of Justice’s U.S. Attorney’s Office for Eastern District of New York “EDNY”), which requested information regarding our interactions with foreign governments and foreign political parties, including the Chinese government, as well as information regarding storage of and access to user data, the development and implementation of Zoom’s privacy policies, and the actions we took relating to the Tiananmen commemorations on Zoom. In July 2020, we received subpoenas from the Department of Justice’s U.S. Attorney’s Office for the Northern District of California (“NDCA”) and the SEC. Both subpoenas seek documents and information relating to various security, data protection and privacy matters, including our encryption, and our statements relating thereto, as well as calculation of usage metrics and related public statements. In addition, the NDCA subpoena seeks information relating to any contacts between our employees and representatives of the Chinese government, and any attempted or successful influence by any foreign government in our policies, procedures, practices, and actions as they relate to users in the United States. We have since received additional subpoenas from EDNY and NDCA seeking related information. We are fully cooperating with all of these investigations and have been conducting our own thorough internal investigation. These investigations are ongoing, and we do not know when they will be completed, which facts we will ultimately discover as a result of the investigations, or what actions the government may or may not take. We cannot predict the outcome of these investigations, and a negative outcome in any or all of these matters could cause us to incur substantial fines, penalties, or other financial exposure. Legal Proceedings Beginning on March 30, 2020, multiple putative class actions have been filed against us in various U.S. federal district courts and state courts relating to our alleged privacy and security practices, including alleged data sharing with third parties (the “U.S. Privacy Class Actions”). We have also been sued under the DC private attorney general statute on behalf of members of the general public. The plaintiffs claim violations of a variety of state consumer protection and privacy laws, and also assert state constitutional and common law claims such as negligence and unjust enrichment. The U.S. Privacy Class Actions seek to certify both nationwide and state-specific classes of individuals using our services in certain time periods. The plaintiffs seek various forms of injunctive and monetary relief, including restitution, statutory and actual damages, punitive damages, and attorneys’ fees. The federal cases have been transferred to and consolidated in the Northern District of California with our consent; lead plaintiffs’ counsel have been appointed; and plaintiffs filed their first amended consolidated class action complaint on October 28, 2020. We filed a motion to dismiss the first amended consolidated class action complaint on December 2, 2020, which is pending ruling by the court, and the parties are presently engaged in discovery, with plaintiffs’ motion for class certification due on June 25, 2021. On April 7, 2020, and April 8, 2020, securities class action complaints were filed against us and two of our officers in the United States District Court for the Northern District of California. The plaintiffs are purported stockholders of the Company. The complaints allege, among other things, that we violated Sections 10(b) and 20(a) of the Securities Exchange Act of 1934, and Rule 10b-5 by making false and misleading statements and omissions of material fact about our data privacy and security measures. The complaints seek unspecified damages, interest, fees, and costs. On May 18, 2020, the actions were consolidated. On November 4, 2020, the court appointed a lead plaintiff. On December 23, 2020, the lead plaintiff filed a consolidated complaint. The response to the complaint is currently stayed while the court considers a motion for reconsideration regarding its lead plaintiff appointment. On June 11, 2020 and July 30, 2020, purported shareholder derivative complaints were filed in the United States District Court for the District of Delaware. The first complaint names as defendants nine of our officers and directors and the second complaint names eight of our officers and directors. The lawsuits assert state and federal claims and are based on the same alleged misstatements as the shareholder class action complaint. The lawsuits accuse our board of directors of failing to exercise reasonable and prudent supervision over our management, policies, practices, and internal controls. The plaintiffs seek unspecified monetary damages on behalf of us as well as governance reforms. On September 25, 2020, the derivative cases were consolidated. The consolidated case is stayed pending resolution of a forthcoming motion to dismiss the securities class action. We believe these lawsuits are without merit, and we are vigorously defending ourselves against them. Given the uncertainty of litigation, the preliminary stage of the cases, and the legal standards that must be met for, among other things, class certification and success on the merits, we cannot estimate the reasonably possible loss or range of loss that may result from these actions. In September 2019, the FTC issued a CID to us requiring us to produce certain documents and materials and to answer certain interrogatories relating to our privacy and security representations and practices. Since then, we have fully cooperated with the investigation. In October 2020, we reached a proposed settlement agreement with the FTC staff, which would resolve the FTC’s allegations that certain of our statements and practices about our security constituted deceptive and unfair acts or practices in violation of the FTC Act. On November 10, 2020, the FTC Commissioners voted to approve the settlement and, on November 13, 2020, the FTC published the settlement in the Federal Register for a 30-day public comment period, which ended on December 13, 2020. On January 19, 2021, the FTC voted to finalize the settlement. Under the terms of the settlement, we neither admit nor deny the FTC’s allegations, and the FTC does not impose any fine or penalty upon us. We are required to implement certain injunctive provisions, including, among other things, refraining from making any misrepresentations regarding the privacy and security of our services or how we collect, maintain, use, delete, disclose, allow access to, and protect user information. It also requires us to implement a detailed information security program and obtain third-party security assessments periodically. We do not expect the settlement to have a material impact on our financial results. We will cooperate with the FTC’s requirements and work to ensure compliance. Any failure to comply with the settlement may increase the possibility of additional adverse consequences, including litigation, additional regulatory actions, injunctions, or monetary penalties, or require further changes to our business practices, significant management time, or the diversion of significant operational resources, all of which could result in a material loss or otherwise harm our business. In addition, from time to time, we are involved in various other legal proceedings arising from the normal course of business activities. We are not presently a party to any other such litigation the outcome of which, we believe, if determined adversely to us, would individually, or taken together, have a material adverse effect on our business, operating results, cash flows, or financial condition. Defending such proceedings is costly and can impose a significant burden on management and employees. We may receive unfavorable preliminary or interim rulings in the course of litigation, and there can be no assurances that favorable final outcomes will be obtained.

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan

12 Months Ended

Jan. 31, 2021

Equity [Abstract]

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan

Convertible Preferred Stock, Stockholders’ Equity (Deficit), and Equity Incentive Plans

Convertible Preferred Stock

Upon completion of the IPO in April 2019, all shares of convertible preferred stock outstanding, totaling 152,665,804 shares, were automatically converted into an equivalent number of shares of Class B common stock on a one-to-one basis and their carrying value of $159.6 million was reclassified into stockholders’ equity. As of January 31, 2021 and 2020, there were no shares of convertible preferred stock issued and outstanding.

In connection with the IPO, our amended and restated certificate of incorporation became effective, which authorized the issuance of 200,000,000 shares of undesignated preferred stock with a par value of $0.001 with rights and preferences, including voting rights, designated from time to time by our board of directors.

Dual-Class Common Stock Structure

In November 2018, we implemented a dual class common stock structure pursuant to which all the then-outstanding shares of our common stock were reclassified as Class B common stock and a new class of Class A common stock was authorized. The Class A common stock is entitled to one vote per share and the Class B common stock is entitled to 10 votes per share. The Class A and Class B common stock have the same dividend and liquidation rights. Each share of Class B common stock will automatically convert into one share of Class A common stock upon (a) any transfer of such share, except for certain permitted transfers described in our amended and restated certificate of incorporation and (b) the death of the holder of such share. In addition, each share of Class B common stock will be automatically converted into one share of Class A common stock upon the earliest of (a) the date that is six months following the death or incapacity of Eric S. Yuan (our CEO), (b) the date that is six months following the date that Mr. Yuan is no longer providing services to us or his employment is terminated for cause, (c) the date specified by the holders of a majority of the then-outstanding shares of convertible preferred stock, voting together on an as-converted basis, and the holders of a majority of the then-outstanding shares of Class B common stock, voting as a separate class, and (d) the 15-year anniversary of the closing of our IPO. In connection with the implementation of the dual-class common stock structure, each then-outstanding share of our convertible preferred stock became convertible into one share of Class B common stock, and all outstanding options to purchase shares of common stock became options to purchase an equivalent number of shares of Class B common stock.

Upon the effectiveness of the amended and restated certificate of incorporation in November 2018, the number of shares of common stock that is authorized to be issued consisted of 320,000,000 shares of Class A common stock, $0.001 par value per share and 300,000,000 shares of Class B common stock, $0.001 par value per share. Class A and Class B common stock are collectively referred to as “common stock” throughout the notes to the consolidated financial statements, unless otherwise noted.

Equity Financing

On April 23, 2019, we completed our IPO, in which we issued and sold 9,911,434 shares of our Class A common stock at $36.00 per share. On April 18, 2019, the underwriters exercised their option to purchase an additional 3,130,435 shares of our Class A common stock at $36.00 per share. We received aggregate proceeds of $447.9 million, net of underwriters’ discounts and commissions. In connection with the IPO:

•all of the shares of convertible preferred stock outstanding automatically converted into an aggregate of 152,665,804 shares of Class B common stock;

•outstanding convertible promissory notes and accrued interest automatically converted into 426,223 shares of Class A common stock based on the IPO price of $36.00 per share; and

•Salesforce Ventures LLC purchased 2,777,777 shares of Class A common stock from us at $36.00 per share in a concurrent private placement. We received aggregate proceeds of $100.0 million and did not pay any underwriting discounts or commissions with respect to the shares of Class A common stock that were sold in this private placement.

Deferred offering costs consist primarily of accounting, legal, and other fees related to our IPO. Prior to the IPO, all deferred offering costs were capitalized in other assets, noncurrent in the consolidated balance sheets. After the IPO, $6.4 million of deferred offering costs were reclassified into stockholders’ equity (deficit) as a reduction of the IPO proceeds in the consolidated balance sheets. We capitalized $2.4 million of deferred offering costs within other assets, noncurrent in the consolidated balance sheet as of January 31, 2019, which were reclassified into additional paid-in capital upon the completion of the IPO.

On January 15, 2021, we completed our follow-on public offering, in which we issued and sold 5,882,353 shares of our Class A common stock, including 735,294 shares pursuant to the full exercise of the underwriter's option to purchase additional shares, at $340.00 per share. We received aggregate proceeds of $1,980.0 million, net of underwriters’ discounts and commissions. The other related offering costs were immaterial.

Common Stock

Upon the completion of the IPO in April 2019, our amended and restated certificate of incorporation became effective, which also authorized the issuance of 2,000,000,000 shares of Class A common stock, $0.001 par value per share and 300,000,000 shares of Class B common stock, $0.001 par value per share.

We have the following shares of Class A common stock reserved for future issuance:


	As of January 31,
	2021	2020
Stock options outstanding	9,239,504	16,833,009
RSUs outstanding	4,510,730	1,964,668
ESPP purchase rights outstanding	724,883	1,323,662
Remaining shares available for future issuance under the 2011 and 2019 plan	44,584,783	33,604,587
Remaining shares available for future issuance under the ESPP	9,648,574	7,186,070
Total shares of Class A common stock reserved	68,708,474	60,911,996

Equity Incentive Plans

In 2011, we adopted the 2011 Global Share Plan (“2011 Plan”), under which officers, employees, and consultants were granted various forms of equity incentive compensation at the discretion of the board of directors, including stock options and restricted stock awards. In connection with the IPO, the shares of Class B common stock remaining available for issuance under the 2011 Plan became available for issuance for a corresponding number of shares of our Class A common stock under the 2019 Equity Incentive Plan (“2019 Plan”), which is a successor to and continuation of our 2011 Plan.

In April 2019, we adopted the 2019 Plan, which became effective in connection with our IPO. Our 2019 Plan provides for the grant of stock options, stock appreciation rights, RSAs, RSU awards, performance awards, and other forms of awards. The maximum number of shares of our Class A common stock that may be issued under our 2019 Plan will not exceed 58,300,889 shares of our Class A common stock, which is the sum of (1) 34,000,000 new shares, plus (2) an additional number of shares not to exceed 24,300,889, consisting of (A) shares that remain available for the issuance of awards under our 2011 Plan as of immediately prior to the time our 2019 Plan becomes effective and (B) shares of Class B common stock subject to outstanding stock options or other stock awards granted under our 2011 Plan that, on or after the 2019 Plan became effective, terminate, or expire prior to exercise or settlement; are not issued because the award is settled in cash; are forfeited because of the failure to vest; or are reacquired or withheld (or not issued) to satisfy a tax withholding obligation or the purchase or exercise price, if any, as such shares become available from time to time. In addition, the number of shares of our Class A common stock reserved for issuance under our 2019 Plan automatically increases on February 1 of each calendar year, starting on February 1, 2020 through February 1, 2029, in an amount equal to (i) 5% of the total number of shares of our common stock (both Class A and Class B) outstanding on January 31 of the fiscal year before the date of each automatic increase or (ii) a lesser number of shares determined by our board of directors prior to the applicable February 1.

Stock Options

A summary of stock option activity under our equity incentive plan and related information is as follows:


	Stock Options
	Outstanding Stock Options	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value

	(in thousands, except share, life and per share data)
Balance as of January 31, 2020	16,833,009	$	5.73	7.6	$	1,191,881
Granted	—	$	—
Exercised	(7,378,477)	$	3.87		$	1,786,657
Canceled/forfeited/expired	(215,028)	$	8.05
Balance as of January 31, 2021	9,239,504	$	7.17	7.0	$	3,371,457
Vested and exercisable as of January 31, 2021	4,641,908	$	3.98	6.6	$	1,708,663

There were no options granted for the fiscal year ended January 31, 2021. The weighted-average grant date fair value of options granted to employees during the fiscal years ended January 31, 2020 and 2019 was $25.17 and $6.28, respectively. The intrinsic value of the options exercised, which represents the difference between the fair market value of our common stock on the date of exercise and the exercise price of each option, was $1,786.7 million, $767.3 million, and $60.8 million during the fiscal years ended January 31, 2021, 2020, and 2019, respectively. As of January 31, 2021, unrecognized stock-based compensation expense related to outstanding unvested stock options was $46.7 million, which is expected to be recognized over a weighted-average period of 1.4 years.

The Black-Scholes assumptions used to value the employee options at the grant dates are as follows:


	Year ended January 31,
		2020	2019
Expected term (years)		5.0 - 6.1	5.0 - 6.2
Expected volatility		49.9% - 53.2%	44.6% - 48.2%
Risk-free interest rate		1.6% - 2.5%	2.6% - 3.1%
Expected dividend yield		—	—

These assumptions and estimates were determined as follows:

•Fair Value of Common Stock. Prior to our IPO, the fair value was determined by our board of directors, with input from management and valuation reports prepared by third-party valuation specialists. Stock-based compensation for financial reporting purposes is measured based on updated estimates of fair value when appropriate, such as when additional relevant information related to the estimate becomes available in a valuation report issued as of a subsequent date. After our initial public offering, the fair value of each share of underlying common stock was based on the closing price of our Class A common stock as reported on the date of the grant.

•Risk-Free Interest Rate. The risk-free interest rate for the expected term of the options was based on the U.S. Treasury yield curve in effect at the time of the grant.

•Expected Term. The expected term of options represents the period of time that options are expected to be outstanding. Our historical stock option exercise experience does not provide a reasonable basis upon which to estimate an expected term due to a lack of sufficient data. For stock options granted to employees, we estimate the expected term by using the simplified method. The simplified method calculates the expected term as the average of the time-to-vesting and the contractual life of the stock options. For stock options granted to nonemployees, the expected term equals the contractual term of the stock option.

•Expected Volatility. As we have a short trading history for our common stock, the expected volatility was estimated by taking the average historic price volatility for industry peers, consisting of several public companies in our industry that are similar in size, stage of life cycle, or financial leverage, over a period equivalent to the expected term of the awards.

•Expected Dividend Yield. We have never declared or paid any cash dividends and do not presently plan to pay cash dividends in the foreseeable future. As a result, an expected dividend yield of zero percent was used.

Restricted Stock Units

A summary of RSU activity under our equity incentive plan and related information is as follows:


	RSUs
	Unvested RSUs	Weighted-Average Grant Date Fair Value Per Share
Unvested as of January 31, 2020	1,964,668	$	79.11
Granted	3,351,979	$	241.32

Vested	(625,163)	$	86.29
Canceled/forfeited	(180,754)	$	181.18
Unvested as of January 31, 2021	4,510,730	$	194.57

As of January 31, 2021, unrecognized stock-based compensation expense related to outstanding unvested RSUs was $734.6 million, which is expected to be recognized over a weighted-average period of 2.7 years.

2019 Employee Stock Purchase Plan

In April 2019, we adopted the 2019 ESPP, which became effective in connection with the IPO. A total of 9,000,000 shares of our Class A common stock were initially reserved for issuance under the ESPP. The number of shares of our Class A common stock reserved for issuance automatically increases on February 1 of each calendar year, beginning on February 1, 2020 through February 1, 2029, by the lesser of (1) 1% of the total number of shares of our common stock (both Class A and Class B) outstanding on the last day of the fiscal year before the date of the automatic increase, and (2) 7,500,000 shares; provided that before the date of any such increase, our board of directors may determine that such increase will be less than the amount set forth in clauses (1) and (2).

Under our current ESPP, Class A common stock will be purchased for the accounts of employees participating in the ESPP at a price per share equal to the lesser of (1) 85% of the fair market value of a share of our Class A common stock on the first date of an offering or (2) 85% of the fair market value of a share of our Class A common stock on the date of purchase. No employee may purchase shares under the ESPP at a rate in excess of $25,000 worth of our Class A common stock based on the fair market value per share of our Class A common stock at the beginning of an offering for each calendar year such purchase right is outstanding or 3,000 shares. The 2019 ESPP provides for, at maximum, 27 months offering periods with four offering dates, generally in June and December of each year. The first offering period began on April 18, 2019. During the fiscal years ended January 31, 2021 and 2020, 923,553 and 490,268 shares, respectively, of our Class A common stock were purchased under the ESPP.

As of January 31, 2021, unrecognized stock-based compensation expense related to the ESPP was $31.9 million, which is expected to be recognized over a weighted-average period of 0.4 years.

We estimated the fair value of ESPP purchase rights using a Black-Scholes option-pricing model with the following assumptions:


	Year ended January 31,
	2021	2020
Expected term (years)	0.5 - 2.1	0.5 - 2.1
Expected volatility	40.3% - 75.0%	40.3% - 56.2%
Risk-free interest rate	0.1% - 2.5%	1.5% - 2.5%
Expected dividend yield	—	—

Shares Reserved for Charitable Donations

During fiscal year 2020, our board of directors approved the issuance of 500,000 shares of Class A common stock for the sole purpose of being transferred to nonprofit organizations. As of January 31, 2021, 94,844 shares of Class A common stock have been transferred to a donor advised fund through an unaffiliated nonprofit organization. We recorded a non-cash charge of

$23.3 million for the fair value of the donated shares, which was recorded in general and administrative expense in the consolidated statements of operations for the fiscal year ended January 31, 2021.

Stock-Based Compensation

The stock-based compensation expense by line item in the accompanying consolidated statements of operations is summarized as follows:


	Year Ended January 31,
		2021		2020		2019

		(in thousands)
Cost of revenue		$	34,960	$	7,860	$	1,119
Research and development		50,161		11,645		1,369
Sales and marketing		146,377		41,465		3,540
General and administrative		44,320		12,139		2,913
Total stock-based compensation expense		$	275,818	$	73,109	$	8,941

Income Taxes

12 Months Ended

Jan. 31, 2021

Income Tax Disclosure [Abstract]

Income Taxes

The components of the net income before the provision for income taxes were as follows:


	Year Ended January 31,
	2021		2020		2019

	(in thousands)
Domestic	$	663,909	$	16,268	$	(204)
Foreign	14,125		10,094		8,553
Total	$	678,034	$	26,362	$	8,349

The provision for income taxes was as follows:


	Year Ended January 31,
	2021		2020		2019

	(in thousands)
Current:
Federal	$	—	$	—	$	—
State	1,023		14		80
Foreign	3,933		2,226		685
Total current income tax expense	4,956		2,240		765
Deferred:
Federal	689		—		—
State	248		—		—
Foreign	(175)		(1,183)		—
Total deferred income tax expense	762		(1,183)		—
Total provision for income taxes	$	5,718	$	1,057	$	765

The provision for income taxes differs from the amount computed by applying the statutory federal tax rate as follows:


	Year Ended January 31,
	2021			2020			2019

	(in thousands)
Tax at federal statutory rate	$	142,387		$	5,536		$	1,764
State taxes	636			14			67
Foreign rate differential	89			(2,096)			(1,627)
Stock-based compensation	(302,362)			(32,070)			1,662
Permanent items	2,228			1,009			809
Research and development credits	(3,170)			(2,808)			(289)
Tax uncertainties	(607)			1,019			515
Change in valuation allowance	165,869			30,932			(1,438)

Other	648			(479)			(698)
Total	$	5,718		$	1,057		$	765
Effective tax rate	0.8		%	4.0		%	9.2		%

Deferred income taxes result from differences in the recognition of amounts for tax and financial reporting purposes, as well as operating loss and tax credit carryforwards. Significant components of our deferred income tax assets as of January 31, 2021 and 2020 are as follows:


	As of January 31,
	2021		2020

	(in thousands)
Deferred tax assets:
Net operating loss carryforwards	$	341,487	$	37,507
Research and development credit carryforwards	12,191		5,701
Stock-based compensation	37,255		4,145
Accruals and reserves	29,195		11,586
Deferred revenue	6,565		5,234
Operating lease liabilities	27,842		17,716
Total deferred tax assets	454,535		81,889
Valuation allowance	(335,051)		(36,353)
Total deferred tax assets net of valuation allowance	119,484		45,536

Deferred tax liabilities:
Property and equipment and intangible assets	(17,229)		(6,744)
Deferred contract acquisition costs	(76,593)		(21,156)
Operating right-of-use assets	(25,550)		(16,453)
Total deferred tax liabilities	(119,372)		(44,353)

Net deferred tax assets	$	112	$	1,183

We recognize deferred tax assets to the extent that we believe that these assets are more likely than not to be realized. In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies, carryback potential if permitted under the tax law, and results of recent operations. If we determine that we would be able to realize our deferred tax assets in the future in excess of their net recorded amount, we would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes. Management believes it is more likely than not that some deferred tax assets will not be realized. Accordingly, a valuation allowance has been recorded on U.S. and U.K. deferred tax assets as of January 31, 2021 and 2020. The valuation allowance increased $298.7 million and $35.5 million during the fiscal years ended January 31, 2021 and 2020, respectively, and was primarily attributable to net operating losses generated as a result of stock-based compensation windfall benefits. The valuation allowance decreased $2.3 million during the fiscal year ended January 31, 2019 and was primarily attributable to deferred tax liabilities generated from the capitalization of commissions for GAAP purposes.

We intend to continue maintaining a full valuation allowance on our deferred tax assets in the U.S. and U.K. until there is sufficient evidence to support the reversal of all or some portion of these allowances. In our valuation allowance evaluation, we give more weight to evidence that can be objectively verified than to evidence that cannot be objectively verified. Our consideration of the evidence requires management to make a number of significant judgments, estimates, and assumptions about highly complex and inherently uncertain matters. Given our current earnings and anticipated future earnings, we believe that there is a reasonable possibility that in the foreseeable future, sufficient positive evidence may become available that results in a conclusion that a portion of the valuation allowance will no longer be needed. Release of the valuation allowance would result in the recognition of certain deferred tax assets and a decrease to income tax expense for the period the release is recorded. However, the exact timing and amount of the valuation allowance release are subject to change on the basis of the level of profitability (pretax income adjusted for permanent differences) that we are able to actually achieve.

As of January 31, 2021, we had net operating loss carryforwards of approximately $1,264.3 million for federal income tax purposes, a small portion of which will begin to expire in 2032 if unused. We had net operating loss carryforwards of approximately $797.0 million for state income tax purposes, which will begin to expire in the year 2027 if unused. We also had certain foreign net operating loss carryforwards of $34.1 million, which have an indefinite life.

As of January 31, 2021, we also had research and development credit carryforwards of approximately $13.6 million for federal income tax and $11.4 million for state income tax purposes. The federal research and development tax credit will begin to expire in 2036 if unused. State research and development tax credits carry forward indefinitely.

The federal and state net operating loss carryforwards may be subject to significant limitations under Section 382 and Section 383 of the Internal Revenue Code of 1986 and similar provisions under state law. The Tax Reform Act of 1986 contains provisions that limit the federal net operating loss carryforwards that may be used in any given year in the event of special occurrences, including significant ownership changes. We have completed a Section 382 review and determined that none of our operating losses will expire solely due to Section 382 limitation(s).

We indefinitely reinvest earnings from our foreign subsidiaries and therefore no deferred tax liability has been recognized on the basis difference created by such earnings. We have not provided foreign withholding taxes for any undistributed earnings of our foreign subsidiaries.

A reconciliation of the beginning and ending balance of total unrecognized tax benefits is as follows:


	Unrecognized Tax Benefits
	(in thousands)

Balance - January 31, 2018	$	1,976
Increases related to current year’s tax positions	802

Balance - January 31, 2019	2,778
Increases related to current year’s tax positions	5,328

Balance - January 31, 2020	8,106
Increases related to current year’s tax positions	6,001
Increases related to prior year’s tax positions	314
Current year acquisitions	885
Lapse of statute of limitations	(422)

Balance - January 31, 2021	$	14,884

Included in the balance of unrecognized tax benefits as of January 31, 2021, 2020, and 2019, are $2.0 million, $2.0 million, and $1.0 million, respectively, of tax benefits that, if recognized, would affect the effective tax rate.

We recognize interest and penalties related to unrecognized tax benefits as income tax expense. During the fiscal year ended January 31, 2021, we recognized interest and penalties of $0.1 million, and had a cumulative liability of $0.2 million as of January 31, 2021. During the fiscal year ended January 31, 2020, we recognized interest and penalties of $0.3 million, and had a cumulative liability of $0.3 million as of January 31, 2020. During the fiscal year ended January 31, 2019, we recognized no interest and penalties.

We file income tax returns in the U.S. federal jurisdiction, various state jurisdictions, and various foreign jurisdictions. As of January 31, 2021, all of the years remain open to examination by the federal and state tax authorities, for three or four years from the tax year in which net operating losses or tax credits are utilized. We believe that an adequate provision has been made for any adjustments that may result from tax examinations. Although the timing of the resolution, settlement, and closure of audits is not certain, we do not believe it is reasonably possible that our unrecognized tax benefits will materially change in the next 12 months.

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act was passed into law. On December 27, 2020, the Consolidated Appropriations Act (2021) was passed into law. Both amended portions of relevant tax law and did not have a significant impact on the provision for income taxes for the fiscal year ended January 31, 2021. We will continue to monitor future guidance regarding these acts and other similar stimulus measures to determine any future impacts.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Net Income Per Share Attributable to Common Stockholders

12 Months Ended

Jan. 31, 2021

Earnings Per Share [Abstract]

Net Income Per Share Attributable to Common Stockholders

The following table sets forth the computation of basic and diluted net income per share attributable to common stockholders for the periods presented:


	Year Ended January 31,
		2021		2020				2019
				Class A		Class B		Class A		Class B		Class A		Class B

Numerator:			(in thousands, except share and per share data)
Net income				$	432,968	$	239,348	$	5,450	$	19,855	$	—	$	7,584

Less: undistributed earnings attributable to participating securities				—		(789)		—		(3,555)		—		(7,584)
Net income attributable to common stockholders, basic				$	432,968	$	238,559	$	5,450	$	16,300	$	—	$	0
Reallocation of net income attributable to common stockholders				(14,321)		14,321		(439)		439		—		0
Net income attributable to common stockholders, diluted				$	418,647	$	252,880	$	5,011	$	16,739	$	—	$	0
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic				183,015,245		100,838,409		58,541,269		175,100,067		—		84,483,094
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted				185,860,412		112,267,257		58,583,874		195,714,140		—		116,005,681
Net income per share attributable to common stockholders, basic				$	2.37	$	2.37	$	0.09	$	0.09	$	—	$	0.00
Net income per share attributable to common stockholders, diluted				$	2.25	$	2.25	$	0.09	$	0.09	$	—	$	0.00

The potential shares of common stock that were excluded from the computation of diluted net income per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive are as follows:


	Year Ended January 31,
		2021	2020		2019
			Class A	Class B	Class A	Class B	Class A	Class B

Outstanding stock options			51,444	—	141,782	—	—	3,541,878
Unvested RSUs			98,941	—	606,971	—	—	—
Purchase rights committed under the ESPP			14,951	—	1,180,664	—	—	—

Total			165,336	—	1,929,417	—	—	3,541,878

The table above does not include 405,156 and 500,000 shares of issued Class A common stock held by us as of January 31, 2021 and 2020, respectively, that are reserved for the sole purpose of being transferred to nonprofit organizations.

In October 2018, we entered into a strategic partnership with Dropbox, Inc. (“Dropbox”), a global collaboration platform company, which involves the development of technology enabling integrated workflows for users between our platform and the Dropbox platform, as well as a strategic partnership with Atlassian, Inc. (“Atlassian”), a collaboration software company, which involves the development of technology enabling integrated workflows for users between our platform and Atlassian’s Jira Ops and Jira Service Desk products. As of January 31, 2019, we had issued unsecured three-year convertible promissory notes in the principal amounts of $5.0 million and $10.0 million to Dropbox and Atlassian, respectively, which accrued simple interest at 2.75% and 5.0% per annum, respectively. The convertible promissory notes are contingently convertible (convertible upon completion of an IPO or a qualified financing event), and the conditions for the convertible feature were not satisfied as of January 31, 2019. For fiscal year ended January 31, 2019, we have excluded these potential dilutive shares from the calculation of diluted net income per share attributable to common stockholders.

Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Jan. 31, 2021

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (Unaudited)

Selected summarized quarterly financial information for the fiscal years 2021 and 2020 is as follows:


	Three Months Ended
	January 31, 2021		October 31, 2020		July 31, 2020		April 30, 2020		January 31, 2020		October 31, 2019		July 31, 2019		April 30, 2019

	(in thousands)
Revenue	$	882,485	$	777,196	$	663,520	$	328,167	$	188,251	$	166,593	$	145,826	$	121,988
Gross profit	$	615,201	$	518,469	$	471,249	$	224,460	$	155,704	$	135,748	$	117,926	$	97,884
Income (loss) from operations	$	256,117	$	192,242	$	188,104	$	23,385	$	10,553	$	(1,679)	$	2,265	$	1,557
Net income attributable to common stockholders	$	260,393	$	198,440	$	185,742	$	27,036	$	15,313	$	2,207	$	5,521	$	198
Net income per share attributable to common stockholders:
Basic	$	0.91	$	0.70	$	0.66	$	0.10	$	0.06	$	0.01	$	0.02	$	0.00
Diluted	$	0.87	$	0.66	$	0.63	$	0.09	$	0.05	$	0.01	$	0.02	$	0.00

Schedule II: Valuation and Qualifying Accounts

12 Months Ended

Jan. 31, 2021

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II: Valuation and Qualifying Accounts

The table below details the activity of the accounts receivable allowances and deferred tax asset valuation allowance for the fiscal years ended January 31, 2021, 2020, and 2019:


	Balance at Beginning of Year		Additions		Write-offs or Deductions		Balance at End of Year

	(in thousands)
Year ended January 31, 2021
Accounts receivable allowances	$	7,634	$	47,405	$	(18,195)	$	36,844
Deferred tax asset valuation allowance	$	36,353	$	298,698	$	—	$	335,051
Year ended January 31, 2020
Accounts receivable allowances	$	2,071	$	8,583	$	(3,020)	$	7,634
Deferred tax asset valuation allowance	$	877	$	35,476	$	—	$	36,353
Year ended January 31, 2019
Accounts receivable allowances	$	560	$	3,763	$	(2,252)	$	2,071
Deferred tax asset valuation allowance	$	3,154	$	—	$	(2,277)	$	877

All other financial statement schedules have been omitted, since the required information is not applicable or is not present in amounts sufficient to require submission of the schedule, or because the information required is included in the consolidated financial statements and notes thereto included in this Form 10-K.

Summary of Business and Significant Accounting Policies (Policies)	12 Months Ended
	Jan. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) and include the accounts of Zoom Video Communications, Inc., its subsidiaries, and a variable interest entity for which we are the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amounts of revenue and expenses during the reporting period. Significant items subject to such estimates and assumptions include, but are not limited to, the estimated expected benefit period for deferred contract acquisition costs, the allowance for credit losses, the useful lives of long-lived assets, the incremental borrowing rate for operating leases, stock-based compensation expense, sales and other tax liabilities, the fair value of marketable securities, equity investment, convertible promissory note, acquired intangible assets and goodwill, and the valuation of deferred income tax assets and uncertain tax positions. Actual results could differ from those estimates. The COVID-19 pandemic has created, and may continue to create, significant uncertainty in macroeconomic conditions, and the extent of its impact on our operational and financial performance will depend on certain developments, including the duration and spread of the outbreak and the impact on our customers and our sales cycles. During the fiscal years ended January 31, 2021 and 2020, our estimates and assumptions required increased judgment and carried a higher degree of variability and volatility. As events continue to evolve and additional information becomes available, our estimates may change materially in future periods.
Concentration of Risks	Concentration of Risks Our financial instruments that are exposed to concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, restricted cash, and accounts receivable. We maintain our cash, cash equivalents, marketable securities, and restricted cash with high-quality financial institutions with investment-grade ratings. A majority of the cash balances are with U.S. banks and are insured to the extent defined by the Federal Deposit Insurance Corporation.
Cash and Cash Equivalents and Restricted Cash	Cash, Cash Equivalents, and Restricted Cash Cash and cash equivalents consist of cash in banks and highly liquid investments, primarily money market funds, purchased with an original maturity of three months or less. Restricted cash consists of certificates of deposit collateralizing our operating leases, corporate credit cards, and cash from proceeds from international employees’ sales of our common stock, and is included in prepaid expenses and other current assets and other assets, noncurrent in the consolidated balance sheets. As of January 31, 2021 and 2020, we had $50.5 million and $48.5 million, respectively, of cash from proceeds from international employees’ sales of our common stock. The amount is held in our bank account until it is remitted to the employees and the tax authorities. Due to the restrictions on the use of the funds in the bank account, we have classified the amount as restricted cash included in prepaid expenses and other current assets, and a corresponding amount is included in accrued expenses and other current liabilities in the consolidated balance sheets.
Allowance for Credit Losses	Allowance for Credit Losses We are exposed to credit losses primarily through our accounts receivable and investments in available-for-sale debt securities. See Note 3 for additional information related to our available-for-sale debt securities. We maintain an allowance for credit losses for expected uncollectible accounts receivable, which is recorded as an offset to accounts receivable, and changes in such are classified as general and administrative expense in the consolidated statements of operations. The allowance for credit losses is based on management’s estimate for expected credit losses for outstanding accounts receivable. We determine expected credit losses based on historical write-off experience, an analysis of the aging of outstanding receivables, customer payment patterns, the establishment of specific reserves for customers in an adverse financial condition, and adjust based upon our expectations of changes in macroeconomic conditions that may impact the collectibility of outstanding receivables, including noncurrent accounts receivable. We also consider current market conditions and reasonable and supportable forecasts of future economic conditions to inform adjustments to historical loss data. We reassess the adequacy of the allowance for credit losses each reporting period. Furthermore, the allowance for sales returns is recorded as an offset to accounts receivable, and changes to the allowance are classified as a reduction in revenue in the consolidated statements of operations. We estimate returns from sales to customers based on historical chargebacks and return rates.For the fiscal year ended January 31, 2021, our assessment considered business and market disruptions caused by COVID-19 and estimates of credit and collectibility trends. The continued volatility in market conditions and evolving shifts in credit trends are difficult to predict, causing variability and volatility that may have a material impact on our allowance for credit losses in future periods.
Available-for-sale Investments	Available-for-sale Investments Available-for-sale investments consist primarily of high-grade commercial paper, agency bonds, corporate bonds, corporate and other debt securities, U.S. government agency securities, and treasury bills. We classify our marketable securities as available-for-sale at the time of purchase and reevaluate such classification at each balance sheet date. We may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, we classify our securities, including those with maturities beyond 12 months, as current assets in the consolidated balance sheets. We carry these securities at fair value and record unrealized gains and losses in accumulated other comprehensive income, which is reflected as a component of stockholders’ equity. We evaluate our securities with unrealized loss positions as to whether the declines in fair value were due to credit losses, and record the portion of impairment relating to the credit losses through allowance for credit losses limited to the amount that fair value was less than the amortized cost basis. Realized gains and losses from the sale of marketable securities are determined based on the specific identification method. Realized gains and losses are reported in interest income and other, net in the consolidated statements of operations.
Fair Value Measurements	Fair Value Measurements Fair value is defined as the exchange price that would be received from the sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We measure financial assets and liabilities at fair value at each reporting period using a fair value hierarchy, which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value: Level 1—Quoted prices in active markets for identical assets or liabilities. Level 2—Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Financial instruments consist of cash equivalents, restricted cash, marketable securities, accounts receivable, and accounts payable. Cash equivalents, restricted cash, and marketable securities are stated at fair value on a recurring basis. Accounts receivable and accounts payable are stated at their carrying value, which approximates fair value due to the short time to the expected receipt or payment date.
Property and Equipment, Net	Property and Equipment, Net Property and equipment, net, are stated at cost, less accumulated depreciation and amortization. Depreciation and amortization are calculated using the straight-line method over the estimated useful lives of the respective assets, determined to be three to five years. Leasehold improvements are amortized over the shorter of the remaining lease term or the estimated useful life of five years. Expenditures for maintenance and repairs are expensed as incurred. Significant improvements and betterments that substantially enhance the life of an asset are capitalized.
Software Development Costs	Software Development Costs We capitalize certain development costs related to our unified communications platform during the application development stage as long as it is probable the project will be completed, and the software will be used to perform the function intended. Capitalized software development costs are recorded as part of property and equipment, net. Costs related to preliminary project activities and post-implementation activities are expensed as incurred. Capitalized software development costs are amortized on a straight-line basis over the software’s estimated useful life, which is generally three years, and are recorded in cost of revenue in the consolidated statements of operations. We evaluate the useful lives of these assets on an annual basis and test for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. We have capitalized $19.4 million, $3.1 million, and $2.5 million of software development costs during the fiscal years ended January 31, 2021, 2020, and 2019, respectively.
Leases	Leases We adopted Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842) and applicable updates as of February 1, 2019, using the modified retrospective method of applying the new standard at the adoption date. Prior year comparative financial information was not recast under the new standard and continues to be presented under Accounting Standards Codification (“ASC”) 840. All lease arrangements are generally recognized at lease commencement. Operating lease right-of-use (“ROU”) assets and operating lease liabilities are recognized at commencement. For short-term leases (an initial term of 12 months or less), an ROU asset and corresponding lease liability are not recorded and we record rent expense in our consolidated statements of operations on a straight-line basis over the lease term and record variable lease payments as incurred. ROU assets represent our right to use an underlying asset during the reasonably certain lease term, and lease liabilities represent our obligation to make lease payments arising from the lease. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Operating lease ROU assets and liabilities are recognized at the commencement date based on the present value of fixed payments not yet paid over the lease term. We use our incremental borrowing rate based on the information available at the commencement date in determining the lease liabilities as our leases generally do not provide an implicit rate. Our incremental borrowing rate is estimated to approximate the interest rate on a collateralized basis with similar terms and payments, in an economic environment where the leased asset is located. ROU assets also include any initial direct costs incurred and any lease payments made at or before the lease commencement date, less lease incentives received. We reassess the lease term if and when a significant event or change in circumstances occurs within our control. We currently do not have any finance leases.
Impairment of Long-Lived Assets	Impairment of Long-Lived AssetsWe evaluate long-lived assets or asset groups for impairment whenever events indicate that the carrying value of an asset or asset group may not be recoverable based on expected future cash flows attributable to that asset or asset group. Recoverability of assets held and used is measured by comparing the carrying amount of an asset or an asset group to estimated undiscounted future net cash flows expected to be generated by the asset or asset group. If the carrying amount of an asset or asset group exceeds estimated undiscounted future cash flows, then an impairment charge would be recognized based on the excess of the carrying amount of the asset or asset group over its fair value. Assets to be disposed of are reported at the lower of their carrying amount or fair value, less costs to sell.
Business Combinations	Business Combinations We account for our business combinations using the acquisition method of accounting, which requires, among other things, allocation of the fair value of purchase consideration to the tangible and intangible assets acquired and liabilities assumed at their estimated fair values on the acquisition date. The excess of the fair value of purchase consideration over the values of these identifiable assets and liabilities is recorded as goodwill. When determining the fair value of assets acquired and liabilities assumed, we make estimates and assumptions, especially with respect to intangible assets. Our estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates. During the measurement period, not to exceed one year from the date of acquisition, we may record adjustments to the assets acquired and liabilities assumed, with a corresponding offset to goodwill if new information is obtained related to facts and circumstances that existed as of the acquisition date. After the measurement period, any subsequent adjustments are reflected in the consolidated statements of operations. Acquisition costs, such as legal and consulting fees, are expensed as incurred. Uncertain tax positions and tax-related valuation allowances are initially established in connection with a business combination as of the acquisition date. We continue to collect information and reevaluate these estimates and assumptions quarterly. We will record any adjustments to our preliminary estimates to goodwill, provided that it is within the one-year measurement period.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill amounts are not amortized, but rather tested for impairment at least annually or more often if circumstances indicate that the carrying value may not be recoverable. Goodwill is considered impaired if the carrying value of the reporting unit exceeds its fair value. We have one reporting unit and as a result, goodwill has been assigned to the single reporting unit. We conducted our annual impairment test of goodwill in the fourth quarter of fiscal year 2021 and determined that no adjustment to the carrying value of goodwill was required. Intangible assets consist of acquired identifiable intangible assets resulting from business combinations, as well as other intangible assets purchased outside of a business combination, such as domains and intellectual property addresses. Finite-lived intangible assets are initially recorded at fair value and are amortized on a straight-line basis over their estimated useful lives. Amortization expense of developed technology is recorded within cost of revenue in the consolidated statements of operations. We routinely evaluate the estimated remaining useful lives of our finite-lived intangible assets and whether events or changes in circumstances warrant a revision to the remaining period of amortization. Indefinite-lived intangible assets are recorded at fair value and are not amortized. We review the useful lives of indefinite-lived intangible assets each reporting period to determine whether events and circumstances continue to support the indefinite useful life classification. If we determine that the life of an intangible asset is no longer indefinite, that asset would be tested for impairment and amortized prospectively over its estimated remaining useful life. There were no impairment charges to acquired intangible assets during the fiscal year ended January 31, 2021.
Revenue Recognition	Revenue Recognition We derive our revenue primarily from subscription agreements with customers for access to our unified communications platform and services. We also provide other services, which include professional services, consulting services, and online event hosting, which were immaterial to our consolidated financial statements. Revenue is recognized when a customer obtains control of promised services. The amount of revenue recognized reflects the consideration that we expect to receive in exchange for these services. We determine revenue recognition through the following steps: 1.Identification of the contract, or contracts, with the customer We determine a contract with a customer to exist when the contract is approved, each party’s rights regarding the services to be transferred can be identified, the payment terms for the services can be identified, the customer has the ability and intent to pay, and the contract has commercial substance. At contract inception, we will evaluate whether two or more contracts should be combined and accounted for as a single contract and whether the combined or single contract includes more than one performance obligation. We apply judgment in determining the customer’s ability and intent to pay, which is based on a variety of factors, including the customer’s historical payment experience or, in the case of a new customer, credit and financial information pertaining to the customer. 2.Identification of the performance obligations in the contract Performance obligations committed in a contract are identified based on the services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the service either on its own or together with other resources that are readily available from third parties or from us, and are distinct in the context of the contract, whereby the transfer of the services or products is separately identifiable from other promises in the contract. Promised services or products under which both of these two criteria are not met are recognized as a combined, single performance obligation. Our performance obligations primarily relate to access to our unified communications platform, which consists of one or more software-based services. Our customers do not have the ability to take possession of our software, and through access to our platform, we provide a series of distinct software-based services that are satisfied over the term of the subscription. 3.Determination of the transaction price The transaction price is determined based on the consideration to which we expect to be entitled in exchange for transferring services to the customer. Variable consideration is included in the transaction price if, in our judgment, it is probable that a significant future reversal of cumulative revenue recognized under the contract will not occur. None of our contracts contain a significant financing component. Revenue is recognized net of any taxes collected from customers, which are subsequently remitted to governmental entities (e.g., sales and other indirect taxes). Our unified communications platform and related services are typically warranted to perform in a professional manner that will comply with the terms of the subscription agreements. In addition, we include service-level commitments to our customers warranting certain levels of uptime reliability and performance and permitting those customers to receive credits in the event that we fail to meet those service levels. These credits represent a form of variable consideration. We have not provided any material refunds related to these agreements in the consolidated financial statements during the periods presented. 4.Allocation of the transaction price to the performance obligations in the contract Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation based on each performance obligation’s relative standalone selling price. Our contracts with multiple performance obligations are generally sold over the same subscription term and have the same pattern of transfer to the customer, and so they are accounted for as one combined performance obligation in the context of the contract. Accordingly, the transaction price is allocated to this single performance obligation. 5.Recognition of the revenue when, or as, a performance obligation is satisfied Revenue is recognized at the time the related performance obligation is satisfied by transferring the control of the promised service to a customer. Revenue is recognized in an amount that reflects the consideration that we expect to receive in exchange for those services. Fees for access to our unified communications platform and related services are subscription revenue and are considered one performance obligation, and the related revenue is recognized ratably over the subscription period as we satisfy the performance obligation. Professional services are time-based arrangements and revenue is recognized as these services are performed. Fees for services represent less than 2% of total revenue during the periods presented.
Cost of Revenue	Cost of Revenue Cost of revenue primarily consists of costs related to hosting our unified communications platform and providing general operating support services to our customers. These costs are composed of co-located data center costs, third-party cloud hosting costs, integrated third-party PSTN services, personnel-related expenses, amortization of capitalized software development costs and acquired intangible assets, royalty payments, and allocated overhead costs. Indirect overhead costs associated with corporate facilities and related depreciation is allocated to cost of revenue and operating expenses based on applicable headcount.
Research and Development	Research and Development Research and development costs include personnel-related expenses associated with our engineering personnel and consultants responsible for the design, development, and testing of our unified communications platform, depreciation of equipment used in research and development, and allocated overhead costs. Research and development costs are expensed as incurred.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred in sales and marketing expense and amounted to $34.8 million, $42.0 million, and $36.1 million for the fiscal years ended January 31, 2021, 2020, and 2019, respectively.
Share-Based Compensation	Stock-Based Compensation Stock-based compensation expense related to stock awards (including stock options, restricted stock awards (“RSAs”), RSUs, and ESPP) is measured based on the fair value of the awards granted and recognized as an expense on a straight-line basis over the requisite service period. The fair value of each option and ESPP award is estimated on the grant date using the Black-Scholes option pricing model. The Black-Scholes option pricing model requires the input of highly subjective assumptions, including the fair value of the underlying common stock, the expected term of the award, the expected volatility of the price of our common stock, risk-free interest rates, and the expected dividend yield of our common stock. The fair value of each RSA and RSU award is based on the fair value of the underlying common stock as of the grant date. The assumptions used to determine the fair value of the stock awards represent management’s best estimates. These estimates involve inherent uncertainties and the application of management’s judgment. We account for forfeitures as they occur instead of estimating the number of awards expected to be forfeited.
Foreign Currency	Foreign Currency The functional currency of our foreign subsidiaries is the U.S. dollar. Accordingly, monetary assets and liabilities of our foreign subsidiaries are remeasured into U.S. dollars at the exchange rates in effect at the reporting date, non-monetary assets and liabilities are remeasured at historical rates, and revenue and expenses are remeasured at average exchange rates in effect during each reporting period. Foreign currency related gains and losses have been immaterial during the periods presented.
Income Taxes	Income Taxes We use the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial reporting and the tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. Deferred tax assets are evaluated for future realization and reduced by a valuation allowance to the extent we believe it is more likely than not that they will not be realized. We consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies, carryback potential if permitted under the tax law, and results of recent operations. We record uncertain tax positions in accordance with ASC 740, Income Taxes on the basis of a two-step process in which (1) we determine whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority. We consider many factors when evaluating our uncertain tax positions, which involve significant judgment and may require periodic adjustments. The resolution of these uncertain tax positions in a manner inconsistent with management's expectations could have a material impact on our consolidated financial statements. We recognize interest and penalties related to uncertain tax positions as a component of our provision for income taxes. Accrued interest and penalties are included with the related tax liability.
Net Income Per Share Attributable to Common Stockholders	Net Income Per Share Attributable to Common Stockholders We calculate our net income per share attributable to Class A and Class B common stock using the two-class method required for companies with participating securities. We consider our convertible preferred stock and unvested common stock, which includes early exercised stock options and RSAs, to be participating securities as holders of such securities have non-forfeitable dividend rights in the event of our declaration of a dividend for shares of common stock. Distributed and undistributed earnings allocated to participating securities are subtracted from net income in determining net income attributable to common stockholders. Basic net income per share is computed by dividing net income attributable to common stockholders by the weighted-average number of shares of our Class A and Class B common stock outstanding. The diluted net income per share attributable to common stockholders is computed by giving effect to all dilutive securities. Diluted net income per share attributable to common stockholders is computed by dividing the resulting net income attributable to common stockholders by the weighted-average number of fully diluted common shares outstanding.
Segment Information	Segment Information We operate in one operating segment. Operating segments are defined as components of an enterprise about which separate financial information is evaluated regularly by the chief operating decision maker, who is our Chief Executive Officer (“CEO”), in deciding how to allocate resources and assessing performance. Our chief operating decision maker allocates resources and assesses performance based upon consolidated financial information.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which was subsequently amended by ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, in November 2018. Subsequently, the FASB issued ASU No. 2019-04, ASU No. 2019-05, ASU No. 2019-10, and ASU No. 2019-11 to provide additional guidance on the credit losses standard. ASU No. 2016-13 and the related updates replace the existing incurred loss impairment model with an expected credit loss model, and requires a financial asset measured at amortized cost to be presented at the net amount expected to be collected. We adopted the standard as of February 1, 2020, using the modified retrospective method of applying the new standard at the adoption date. Our adoption did not result in any cumulative effect adjustment in our consolidated financial statements upon adoption as of February 1, 2020. In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. The amendment aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). We adopted ASU No. 2018-15, prospectively, as of February 1, 2020, and our adoption did not have a material impact on the consolidated financial statements.

Summary of Business and Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2021

Accounting Policies [Abstract]

Accounts Receivable, Allowance for Credit Loss



	As of January 31, 2021

	(in thousands)
Accounts receivable, gross	$	331,547
Less: Allowance for credit losses	(20,500)
Less: Allowance for returns	(16,344)
Accounts receivable, net	$	294,703

Below is a rollforward of our allowance for credit losses for the fiscal year ended January 31, 2021.




	(in thousands)
Balance as of January 31, 2020	$	5,150
Provision for credit losses	25,651
Write-offs	(10,301)
Balance as of January 31, 2021	$	20,500

Long-lived Assets by Geographic Areas

The following table presents our property and equipment, net of depreciation and amortization, by geographic region:


	As of January 31,
	2021		2020

	(in thousands)
Americas	$	138,093	$	48,519
APAC	10,033		7,464
EMEA	1,798		1,155
Total property and equipment, net	$	149,924	$	57,138

Revenue Recognition (Tables)

12 Months Ended

Jan. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue by Region

The following table summarizes revenue by region based on the billing address of customers:


	Year Ended January 31,
		2021		2020				2019
				Amount		Percentage of Revenue		Amount		Percentage of Revenue		Amount		Percentage of Revenue

			(in thousands, except percentages)
Americas				$	1,831,694	69	%	$	500,622	81	%	$	270,132	82	%
APAC				332,844		13		51,152		8		27,720		8
EMEA				486,830		18		70,884		11		32,665		10
Total				$	2,651,368	100	%	$	622,658	100	%	$	330,517	100	%

Deferred Contract Acquisition Costs

The following table represents a rollforward of deferred contract acquisition costs:


	Year Ended January 31,
	2021		2020

	(in thousands)
Beginning balance	$	91,130	$	55,516
Additions to deferred contract acquisition costs	307,068		72,715
Amortization of deferred contract acquisition costs	(104,306)		(37,101)
Ending balance	$	293,892	$	91,130
Deferred contract acquisition costs, current (to be amortized in next 12 months)	$	136,630	$	44,885
Deferred contract acquisition costs, noncurrent	157,262		46,245
Total deferred contract acquisition costs	$	293,892	$	91,130

Marketable Securities (Tables)

12 Months Ended

Jan. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Summary of Marketable Securities

As of January 31, 2021 and 2020, our marketable securities consisted of the following:


	As of January 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

	(in thousands)





Commercial paper	$	26,222	$	—	$	—	$	26,222
Agency bonds	461,335		79		(49)		461,365
Corporate and other debt securities	465,207		1,113		(64)		466,256
U.S. government agency securities	834,894		28		(257)		834,665
Treasury bills	215,902		6		(6)		215,902
Marketable securities	$	2,003,560	$	1,226	$	(376)	$	2,004,410


	As of January 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

	(in thousands)


Commercial paper	$	37,894	$	—	$	—	$	37,894
Agency bonds	141,157		49		(43)		141,163
Corporate and other debt securities	320,407		775		(16)		321,166
U.S. government agency securities	71,794		45		(2)		71,837

Marketable securities	$	571,252	$	869	$	(61)	$	572,060

Summary of Contractual Maturities of Marketable Securities

The following table presents the contractual maturities of our marketable securities as of January 31, 2021 and 2020:


	As of January 31,
	2021		2020

	(in thousands)
Less than one year	$	1,017,048	$	315,900
Due in one to five years	987,362		256,160
Total	$	2,004,410	$	572,060

Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments Measured at Fair Value on Recurring Basis


	As of January 31, 2021
	Fair Value		Level 1		Level 2		Level 3

	(in thousands)
Financial Assets:
Money market funds	$	958,357	$	958,357	$	—	$	—
Treasury bills	618,498		—		618,498		—


Cash equivalents	1,576,855		958,357		618,498		—
Commercial paper	26,222		—		26,222		—
Agency bonds	461,365		—		461,365		—
Corporate and other debt securities	466,256		—		466,256		—
U.S. government agency securities	834,665		—		834,665		—
Treasury bills	215,902		—		215,902		—
Marketable securities	2,004,410		—		2,004,410		—
Certificate of deposit included in prepaid expenses and other current assets	100		—		100		—

Certificates of deposit included in other assets, noncurrent	2,238		—		2,238		—

Convertible note included in other assets, noncurrent	5,130		—		—		5,130
Total financial assets	$	3,588,733	$	958,357	$	2,625,246	$	5,130


	As of January 31, 2020
	Fair Value		Level 1		Level 2		Level 3

	(in thousands)
Financial Assets:
Money market funds	$	96,486	$	96,486	$	—	$	—
Commercial paper	4,994		—		4,994		—

Agency bonds	9,999		—		9,999		—
Cash equivalents	111,479		96,486		14,993		—
Commercial paper	37,894		—		37,894		—
Agency bonds	141,163		—		141,163		—
Corporate and other debt securities	321,166		—		321,166		—
U.S. government agency securities	71,837		—		71,837		—

Marketable securities	572,060		—		572,060		—
Certificate of deposit included in prepaid expenses and other current assets	100		—		100		—

Certificates of deposit included in other assets, noncurrent	2,301		—		2,301		—

Total financial assets	$	685,940	$	96,486	$	589,454	$	—

Balance Sheet Components (Tables)

12 Months Ended

Jan. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure

Prepaid expenses and other current assets consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Prepaid expenses	60,702		22,320
Restricted cash from international employee stock sales	50,475		48,547
Other	5,642		4,141
Prepaid expenses and other current assets	$	116,819	$	75,008

Schedule of Property and Equipment

Property and equipment consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Computer and office equipment	$	137,445	$	51,375
Software	36,216		10,855
Leasehold improvements	23,593		18,215
Furniture and fixtures	4,625		3,949
Property and equipment, gross	201,879		84,394
Less: accumulated depreciation and amortization	(51,955)		(27,256)
Property and equipment, net	$	149,924	$	57,138

Schedule of Other Assets, Noncurrent

Other assets, noncurrent consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Accounts receivable, noncurrent	$	28,008	$	9,011
Equity investment	13,538		3,000
Prepaid expense, noncurrent	12,386		2,945
Indefinite-lived intangible assets	8,002		2,159

Convertible note	5,130		—
Intangible assets subject to amortization, net	2,814		—
Other	6,075		5,217
Other assets, noncurrent	$	75,953	$	22,332

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Accrued expenses	$	157,167	$	17,475

Accrued compensation and benefits	118,640		36,732
Proceeds from employee equity transactions to be remitted to employees and tax authorities	54,174		49,287
Sales and other tax liabilities	27,453		3,774
Customer deposit liabilities	13,050		3,414
Operating lease liabilities, current	15,601		7,675

Other	6,933		4,335
Accrued expenses and other current liabilities	$	393,018	$	122,692

Schedule of Other Liabilities, Noncurrent

Other liabilities, noncurrent consisted of the following:


	As of January 31,
	2021		2020

	(in thousands)
Sales and other tax liabilities	$	58,133	$	33,957



Other	3,501		2,329
Other liabilities, noncurrent	$	61,634	$	36,286

Operating Leases (Tables)

12 Months Ended

Jan. 31, 2021

Leases [Abstract]

Schedule of Supplemental Balance Sheet Information

Supplemental balance sheet information related to operating leases was as follows:


	As of January 31,
	2021			2020
	(in thousands)
Reported as:
Assets:
Operating lease right-of-use assets	$	97,649		$	68,608
Liabilities:
Accrued expenses and other current liabilities	$	15,601		$	7,675
Operating lease liabilities, noncurrent	90,415			64,792
Total operating lease liabilities	$	106,016		$	72,467

Weighted average remaining lease term	6.1 years			7.5 years
Weighted average discount rate	4.5		%	5.1		%

Supplemental Cash Flow and Other Information

Supplemental cash flow and other information related to operating leases was as follows:


	Year Ended January 31,
	2021		2020
	(in thousands)
Cash payments included in the measurement of our operating lease liabilities	$	13,717	$	9,774
Operating lease right-of-use assets recognized in exchange for new operating lease obligations	$	39,918	$	34,993

Schedule of Future Minimum Lease Payments included in Measurement of Operating Lease Liabilities

As of January 31, 2021, the future minimum lease payments included in the measurement of our operating lease liabilities are as follows:


	As of January 31, 2021
	(in thousands)
Year Ending January 31,
2022	$	19,949
2023	21,313
2024	20,310
2025	20,216
2026	15,384
Thereafter	24,808
Total operating lease payments	$	121,980
Less: imputed interest	(15,964)
Total operating lease liabilities	$	106,016

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan (Tables)

12 Months Ended

Jan. 31, 2021

Equity [Abstract]

Schedule of Stock by Class Reserved for Future Issuance

We have the following shares of Class A common stock reserved for future issuance:


	As of January 31,
	2021	2020
Stock options outstanding	9,239,504	16,833,009
RSUs outstanding	4,510,730	1,964,668
ESPP purchase rights outstanding	724,883	1,323,662
Remaining shares available for future issuance under the 2011 and 2019 plan	44,584,783	33,604,587
Remaining shares available for future issuance under the ESPP	9,648,574	7,186,070
Total shares of Class A common stock reserved	68,708,474	60,911,996

Summary of Stock Option Activity Under Equity Incentive Plan

A summary of stock option activity under our equity incentive plan and related information is as follows:


	Stock Options
	Outstanding Stock Options	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value

	(in thousands, except share, life and per share data)
Balance as of January 31, 2020	16,833,009	$	5.73	7.6	$	1,191,881
Granted	—	$	—
Exercised	(7,378,477)	$	3.87		$	1,786,657
Canceled/forfeited/expired	(215,028)	$	8.05
Balance as of January 31, 2021	9,239,504	$	7.17	7.0	$	3,371,457
Vested and exercisable as of January 31, 2021	4,641,908	$	3.98	6.6	$	1,708,663

There were no options granted for the fiscal year ended January 31, 2021.

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The Black-Scholes assumptions used to value the employee options at the grant dates are as follows:


	Year ended January 31,
		2020	2019
Expected term (years)		5.0 - 6.1	5.0 - 6.2
Expected volatility		49.9% - 53.2%	44.6% - 48.2%
Risk-free interest rate		1.6% - 2.5%	2.6% - 3.1%
Expected dividend yield		—	—

Summary of Restricted Stock Units (RSUs) Activity Under Equity Incentive Plan

A summary of RSU activity under our equity incentive plan and related information is as follows:


	RSUs
	Unvested RSUs	Weighted-Average Grant Date Fair Value Per Share
Unvested as of January 31, 2020	1,964,668	$	79.11
Granted	3,351,979	$	241.32

Vested	(625,163)	$	86.29
Canceled/forfeited	(180,754)	$	181.18
Unvested as of January 31, 2021	4,510,730	$	194.57

Summary of Assumptions for Estimating Fair Value of ESPP Purchase Rights

We estimated the fair value of ESPP purchase rights using a Black-Scholes option-pricing model with the following assumptions:


	Year ended January 31,
	2021	2020
Expected term (years)	0.5 - 2.1	0.5 - 2.1
Expected volatility	40.3% - 75.0%	40.3% - 56.2%
Risk-free interest rate	0.1% - 2.5%	1.5% - 2.5%
Expected dividend yield	—	—

Summary of Stock-based Compensation Expense by Line Item

The stock-based compensation expense by line item in the accompanying consolidated statements of operations is summarized as follows:


	Year Ended January 31,
		2021		2020		2019

		(in thousands)
Cost of revenue		$	34,960	$	7,860	$	1,119
Research and development		50,161		11,645		1,369
Sales and marketing		146,377		41,465		3,540
General and administrative		44,320		12,139		2,913
Total stock-based compensation expense		$	275,818	$	73,109	$	8,941

Income Taxes (Tables)

12 Months Ended

Jan. 31, 2021

Income Tax Disclosure [Abstract]

Components of the Net Income (Loss) before Provision of Income Taxes

The components of the net income before the provision for income taxes were as follows:


	Year Ended January 31,
	2021		2020		2019

	(in thousands)
Domestic	$	663,909	$	16,268	$	(204)
Foreign	14,125		10,094		8,553
Total	$	678,034	$	26,362	$	8,349

Provision of Income Taxes

The provision for income taxes was as follows:


	Year Ended January 31,
	2021		2020		2019

	(in thousands)
Current:
Federal	$	—	$	—	$	—
State	1,023		14		80
Foreign	3,933		2,226		685
Total current income tax expense	4,956		2,240		765
Deferred:
Federal	689		—		—
State	248		—		—
Foreign	(175)		(1,183)		—
Total deferred income tax expense	762		(1,183)		—
Total provision for income taxes	$	5,718	$	1,057	$	765

Provision for Income Taxes

The provision for income taxes differs from the amount computed by applying the statutory federal tax rate as follows:


	Year Ended January 31,
	2021			2020			2019

	(in thousands)
Tax at federal statutory rate	$	142,387		$	5,536		$	1,764
State taxes	636			14			67
Foreign rate differential	89			(2,096)			(1,627)
Stock-based compensation	(302,362)			(32,070)			1,662
Permanent items	2,228			1,009			809
Research and development credits	(3,170)			(2,808)			(289)
Tax uncertainties	(607)			1,019			515
Change in valuation allowance	165,869			30,932			(1,438)

Other	648			(479)			(698)
Total	$	5,718		$	1,057		$	765
Effective tax rate	0.8		%	4.0		%	9.2		%

Significant Components of Deferred Income Tax Assets

Significant components of our deferred income tax assets as of January 31, 2021 and 2020 are as follows:


	As of January 31,
	2021		2020

	(in thousands)
Deferred tax assets:
Net operating loss carryforwards	$	341,487	$	37,507
Research and development credit carryforwards	12,191		5,701
Stock-based compensation	37,255		4,145
Accruals and reserves	29,195		11,586
Deferred revenue	6,565		5,234
Operating lease liabilities	27,842		17,716
Total deferred tax assets	454,535		81,889
Valuation allowance	(335,051)		(36,353)
Total deferred tax assets net of valuation allowance	119,484		45,536

Deferred tax liabilities:
Property and equipment and intangible assets	(17,229)		(6,744)
Deferred contract acquisition costs	(76,593)		(21,156)
Operating right-of-use assets	(25,550)		(16,453)
Total deferred tax liabilities	(119,372)		(44,353)

Net deferred tax assets	$	112	$	1,183

Reconciliation of Unrecognized Tax Position

A reconciliation of the beginning and ending balance of total unrecognized tax benefits is as follows:


	Unrecognized Tax Benefits
	(in thousands)

Balance - January 31, 2018	$	1,976
Increases related to current year’s tax positions	802

Balance - January 31, 2019	2,778
Increases related to current year’s tax positions	5,328

Balance - January 31, 2020	8,106
Increases related to current year’s tax positions	6,001
Increases related to prior year’s tax positions	314
Current year acquisitions	885
Lapse of statute of limitations	(422)

Balance - January 31, 2021	$	14,884

Net Income Per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Jan. 31, 2021

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share

The following table sets forth the computation of basic and diluted net income per share attributable to common stockholders for the periods presented:


	Year Ended January 31,
		2021		2020				2019
				Class A		Class B		Class A		Class B		Class A		Class B

Numerator:			(in thousands, except share and per share data)
Net income				$	432,968	$	239,348	$	5,450	$	19,855	$	—	$	7,584

Less: undistributed earnings attributable to participating securities				—		(789)		—		(3,555)		—		(7,584)
Net income attributable to common stockholders, basic				$	432,968	$	238,559	$	5,450	$	16,300	$	—	$	0
Reallocation of net income attributable to common stockholders				(14,321)		14,321		(439)		439		—		0
Net income attributable to common stockholders, diluted				$	418,647	$	252,880	$	5,011	$	16,739	$	—	$	0
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders, basic				183,015,245		100,838,409		58,541,269		175,100,067		—		84,483,094
Weighted-average shares used in computing net income per share attributable to common stockholders, diluted				185,860,412		112,267,257		58,583,874		195,714,140		—		116,005,681
Net income per share attributable to common stockholders, basic				$	2.37	$	2.37	$	0.09	$	0.09	$	—	$	0.00
Net income per share attributable to common stockholders, diluted				$	2.25	$	2.25	$	0.09	$	0.09	$	—	$	0.00

Summary of Potential Shares of Common Stock Excluded from Computation of Diluted Net Income Per Share Attributable to Common Stockholders


	Year Ended January 31,
		2021	2020		2019
			Class A	Class B	Class A	Class B	Class A	Class B

Outstanding stock options			51,444	—	141,782	—	—	3,541,878
Unvested RSUs			98,941	—	606,971	—	—	—
Purchase rights committed under the ESPP			14,951	—	1,180,664	—	—	—

Total			165,336	—	1,929,417	—	—	3,541,878

Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Jan. 31, 2021

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information

Selected summarized quarterly financial information for the fiscal years 2021 and 2020 is as follows:


	Three Months Ended
	January 31, 2021		October 31, 2020		July 31, 2020		April 30, 2020		January 31, 2020		October 31, 2019		July 31, 2019		April 30, 2019

	(in thousands)
Revenue	$	882,485	$	777,196	$	663,520	$	328,167	$	188,251	$	166,593	$	145,826	$	121,988
Gross profit	$	615,201	$	518,469	$	471,249	$	224,460	$	155,704	$	135,748	$	117,926	$	97,884
Income (loss) from operations	$	256,117	$	192,242	$	188,104	$	23,385	$	10,553	$	(1,679)	$	2,265	$	1,557
Net income attributable to common stockholders	$	260,393	$	198,440	$	185,742	$	27,036	$	15,313	$	2,207	$	5,521	$	198
Net income per share attributable to common stockholders:
Basic	$	0.91	$	0.70	$	0.66	$	0.10	$	0.06	$	0.01	$	0.02	$	0.00
Diluted	$	0.87	$	0.66	$	0.63	$	0.09	$	0.05	$	0.01	$	0.02	$	0.00

Summary of Business and Significant Accounting Policies - Additional Information (Details) $ in Thousands	12 Months Ended
	Jan. 31, 2021 USD ($) vote	Jan. 31, 2020 USD ($)	Jan. 31, 2019 USD ($)
Summary Of Business And Significant Accounting Policies [Line Items]
Restricted cash from international employee stock sales	$ 50,475	$ 48,547
Capitalized software development costs	19,400	3,100	$ 2,500
Advertising expense	$ 34,800	$ 42,000	$ 36,100
Number of operating segments \| vote	1
Revenue from Contract with Customer \| Professional Services Fees Concentration Risk
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of revenue	2.00%
Minimum
Summary Of Business And Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years
Maximum
Summary Of Business And Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	5 years
Leasehold Improvements \| Maximum
Summary Of Business And Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	5 years
Software
Summary Of Business And Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years

Summary of Business and Significant Accounting Policies - Accounts Receivable, Allowance for Credit Loss (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts receivable, gross	$ 331,547
Less: Allowance for credit losses	(20,500)	$ (5,150)
Less: Allowance for returns	(16,344)
Accounts receivable, net	$ 294,703

Summary of Business and Significant Accounting Policies - Accounts Receivable Allowance For Credit Loss Rollforward (Details) $ in Thousands	12 Months Ended
	Jan. 31, 2021 USD ($)
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts Receivable, Beginning Balance	$ 5,150
Provision for credit losses	25,651
Write-offs	(10,301)
Allowance for Doubtful Accounts Receivable, Ending Balance	$ 20,500

Summary of Business and Significant Accounting Policies - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, net	$ 149,924	$ 57,138
Americas
Property, Plant and Equipment [Line Items]
Property and equipment, net	138,093	48,519
APAC
Property, Plant and Equipment [Line Items]
Property and equipment, net	10,033	7,464
EMEA
Property, Plant and Equipment [Line Items]
Property and equipment, net	$ 1,798	$ 1,155

Revenue Recognition - Summary Disaggregation of Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 882,485	$ 777,196	$ 663,520	$ 328,167	$ 188,251	$ 166,593	$ 145,826	$ 121,988	$ 2,651,368	$ 622,658	$ 330,517
Revenue from Contract with Customer \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue									100.00%	100.00%	100.00%
Americas
Disaggregation of Revenue [Line Items]
Revenue									$ 1,831,694	$ 500,622	$ 270,132
Americas \| Revenue from Contract with Customer \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue									69.00%	81.00%	82.00%
APAC
Disaggregation of Revenue [Line Items]
Revenue									$ 332,844	$ 51,152	$ 27,720
APAC \| Revenue from Contract with Customer \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue									13.00%	8.00%	8.00%
EMEA
Disaggregation of Revenue [Line Items]
Revenue									$ 486,830	$ 70,884	$ 32,665
EMEA \| Revenue from Contract with Customer \| Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of Revenue									18.00%	11.00%	10.00%

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Revenue from Contract with Customer [Abstract]
Unbilled accounts receivable	$ 24.6	$ 12.5
Revenue recognized included in deferred revenue	$ 222.0	$ 119.1	$ 50.3
Capitalized contract cost, amortization period	3 years

Revenue Recognition - Remaining Performance Obligation (Details) $ in Millions	Jan. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 1,750.9
Billed consideration
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	883.5
Unbilled consideration
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 867.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-02-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation percentage	70.00%
Revenue remaining performance obligation, expected timing of satisfaction period	12 months

Revenue Recognition - Deferred Contract Acquisition Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2021	Jan. 31, 2020
Capitalized Contract Cost, Net
Beginning balance	$ 91,130	$ 55,516
Additions to deferred contract acquisition costs	307,068	72,715
Amortization of deferred contract acquisition costs	(104,306)	(37,101)	$ (20,839)
Ending balance	293,892	91,130	55,516
Deferred contract acquisition costs, current				$ 136,630	$ 44,885
Deferred contract acquisition costs, noncurrent				157,262	46,245
Total deferred contract acquisition costs	$ 293,892	$ 55,516	$ 55,516	$ 293,892	$ 91,130

Marketable Securities - Summary Marketable Securities (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Marketable Securities [Line Items]
Amortized Cost	$ 2,003,560	$ 571,252
Gross Unrealized Gains	1,226	869
Gross Unrealized Losses	(376)	(61)
Estimated Fair Value	2,004,410	572,060
Commercial paper
Marketable Securities [Line Items]
Amortized Cost	26,222	37,894
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	26,222	37,894
Agency bonds
Marketable Securities [Line Items]
Amortized Cost	461,335	141,157
Gross Unrealized Gains	79	49
Gross Unrealized Losses	(49)	(43)
Estimated Fair Value	461,365	141,163
Corporate and other debt securities
Marketable Securities [Line Items]
Amortized Cost	465,207	320,407
Gross Unrealized Gains	1,113	775
Gross Unrealized Losses	(64)	(16)
Estimated Fair Value	466,256	321,166
U.S. government agency securities
Marketable Securities [Line Items]
Amortized Cost	834,894	71,794
Gross Unrealized Gains	28	45
Gross Unrealized Losses	(257)	(2)
Estimated Fair Value	834,665	$ 71,837
Treasury bills
Marketable Securities [Line Items]
Amortized Cost	215,902
Gross Unrealized Gains	6
Gross Unrealized Losses	(6)
Estimated Fair Value	$ 215,902

Marketable Securities - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Available-for-sale, realized gain (loss)	$ 0	$ 0	$ 0

Marketable Securities - Summary of Contractual Maturities of Marketable Securities (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Less than one year	$ 1,017,048	$ 315,900
Due in one to five years	987,362	256,160
Total	$ 2,004,410	$ 572,060

Fair Value Measurements - Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Financial Assets:
Marketable securities	$ 2,004,410	$ 572,060
Commercial paper
Financial Assets:
Marketable securities	26,222	37,894
Agency bonds
Financial Assets:
Marketable securities	461,365	141,163
Corporate and other debt securities
Financial Assets:
Marketable securities	466,256	321,166
U.S. government agency securities
Financial Assets:
Marketable securities	834,665	71,837
Treasury bills
Financial Assets:
Marketable securities	215,902
Fair Value, Recurring Basis
Financial Assets:
Cash equivalents	1,576,855	111,479
Marketable securities	2,004,410	572,060
Total financial assets	3,588,733	685,940
Fair Value, Recurring Basis \| Commercial paper
Financial Assets:
Marketable securities	26,222	37,894
Fair Value, Recurring Basis \| Agency bonds
Financial Assets:
Marketable securities	461,365	141,163
Fair Value, Recurring Basis \| Corporate and other debt securities
Financial Assets:
Marketable securities	466,256	321,166
Fair Value, Recurring Basis \| U.S. government agency securities
Financial Assets:
Marketable securities	834,665	71,837
Fair Value, Recurring Basis \| Treasury bills
Financial Assets:
Marketable securities	215,902
Fair Value, Recurring Basis \| Certificates of deposit
Financial Assets:
Prepaid expenses and other current assets	100	100
Other assets, noncurrent	2,238	2,301
Fair Value, Recurring Basis \| Convertible note included in other assets, noncurrent
Financial Assets:
Other assets, noncurrent	5,130
Fair Value, Recurring Basis \| Money market funds
Financial Assets:
Cash equivalents	958,357	96,486
Fair Value, Recurring Basis \| Treasury bills
Financial Assets:
Cash equivalents	618,498
Fair Value, Recurring Basis \| Commercial paper
Financial Assets:
Cash equivalents		4,994
Fair Value, Recurring Basis \| Agency bonds
Financial Assets:
Cash equivalents		9,999
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1
Financial Assets:
Cash equivalents	958,357	96,486
Marketable securities	0	0
Total financial assets	958,357	96,486
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Commercial paper
Financial Assets:
Marketable securities	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Agency bonds
Financial Assets:
Marketable securities	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Corporate and other debt securities
Financial Assets:
Marketable securities	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| U.S. government agency securities
Financial Assets:
Marketable securities	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Treasury bills
Financial Assets:
Marketable securities	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Certificates of deposit
Financial Assets:
Prepaid expenses and other current assets	0	0
Other assets, noncurrent	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Convertible note included in other assets, noncurrent
Financial Assets:
Other assets, noncurrent	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Money market funds
Financial Assets:
Cash equivalents	958,357	96,486
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Treasury bills
Financial Assets:
Cash equivalents	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Commercial paper
Financial Assets:
Cash equivalents		0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 1 \| Agency bonds
Financial Assets:
Cash equivalents		0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2
Financial Assets:
Cash equivalents	618,498	14,993
Marketable securities	2,004,410	572,060
Total financial assets	2,625,246	589,454
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Commercial paper
Financial Assets:
Marketable securities	26,222	37,894
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Agency bonds
Financial Assets:
Marketable securities	461,365	141,163
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Corporate and other debt securities
Financial Assets:
Marketable securities	466,256	321,166
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| U.S. government agency securities
Financial Assets:
Marketable securities	834,665	71,837
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Treasury bills
Financial Assets:
Marketable securities	215,902
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Certificates of deposit
Financial Assets:
Prepaid expenses and other current assets	100	100
Other assets, noncurrent	2,238	2,301
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Convertible note included in other assets, noncurrent
Financial Assets:
Other assets, noncurrent	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Money market funds
Financial Assets:
Cash equivalents	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Treasury bills
Financial Assets:
Cash equivalents	618,498
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Commercial paper
Financial Assets:
Cash equivalents		4,994
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 2 \| Agency bonds
Financial Assets:
Cash equivalents		9,999
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3
Financial Assets:
Cash equivalents	0	0
Marketable securities	0	0
Total financial assets	5,130	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Commercial paper
Financial Assets:
Marketable securities	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Agency bonds
Financial Assets:
Marketable securities	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Corporate and other debt securities
Financial Assets:
Marketable securities	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| U.S. government agency securities
Financial Assets:
Marketable securities	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Treasury bills
Financial Assets:
Marketable securities	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Certificates of deposit
Financial Assets:
Prepaid expenses and other current assets	0	0
Other assets, noncurrent	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Convertible note included in other assets, noncurrent
Financial Assets:
Other assets, noncurrent	5,130
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Money market funds
Financial Assets:
Cash equivalents	0	0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Treasury bills
Financial Assets:
Cash equivalents	$ 0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Commercial paper
Financial Assets:
Cash equivalents		0
Fair Value, Recurring Basis \| Fair Value, Inputs, Level 3 \| Agency bonds
Financial Assets:
Cash equivalents		$ 0

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Fair Value Disclosures [Abstract]
Equity investment	$ 13,538	$ 3,000

Business Combinations (Details) - USD ($) $ in Thousands	Jan. 31, 2021	May 07, 2020	Jan. 31, 2020
Business Acquisition [Line Items]
Goodwill	$ 24,340		$ 0
Minimum
Business Acquisition [Line Items]
Holdback agreements, service period		1 year
Maximum
Business Acquisition [Line Items]
Holdback agreements, service period		3 years
Keybase
Business Acquisition [Line Items]
Business acquisition, percentage of voting interests acquired		100.00%
Payments to acquire businesses, gross		$ 42,900
Goodwill		24,300
Intangible assets, other than goodwill		3,300
Business combination, current assets, other		15,300
Business combination, cash and equivalents		$ 16,400
Acquired finite-lived intangible assets, weighted average useful life	4 years 3 months 18 days	5 years
Holdback agreements related to employees		$ 20,000

Balance Sheet Components - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid expenses	$ 60,702	$ 22,320
Restricted cash from international employee stock sales	50,475	48,547
Other	5,642	4,141
Prepaid expenses and other current assets	$ 116,819	$ 75,008

Balance Sheet Components - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 201,879	$ 84,394
Less: accumulated depreciation and amortization	(51,955)	(27,256)
Property and equipment, net	149,924	57,138
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	137,445	51,375
Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	36,216	10,855
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	23,593	18,215
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,625	$ 3,949

Balance Sheet Components - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Depreciation and amortization expense	$ 28.4	$ 16.4	$ 7.0

Balance Sheet Components - Other Assets, Noncurrent (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts receivable, noncurrent	$ 28,008	$ 9,011
Equity investment	13,538	3,000
Prepaid expense, noncurrent	12,386	2,945
Indefinite-lived intangible assets	8,002	2,159
Convertible note	5,130	0
Intangible assets subject to amortization, net	2,814	0
Other	6,075	5,217
Other assets, noncurrent	$ 75,953	$ 22,332

Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued expenses	$ 157,167	$ 17,475
Accrued compensation and benefits	118,640	36,732
Proceeds from employee equity transactions to be remitted to employees and tax authorities	54,174	49,287
Sales and other tax liabilities	27,453	3,774
Customer deposit liabilities	13,050	3,414
Operating lease liabilities, current	15,601	7,675
Other	6,933	4,335
Accrued expenses and other current liabilities	$ 393,018	$ 122,692

Balance Sheet Components - Schedule of Other Liabilities Non Current (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Sales and other tax liabilities	$ 58,133	$ 33,957
Other	3,501	2,329
Other liabilities, noncurrent	$ 61,634	$ 36,286

Operating Leases - Additional Information (Details) $ in Millions	12 Months Ended
	Jan. 31, 2021 USD ($) lease	Jan. 31, 2020 USD ($)	Jan. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Number of operating lease options \| lease	1
Operating lease expense	$ 14.5	$ 9.7
Rent expense			$ 7.2
Maximum
Lessee, Lease, Description [Line Items]
Lease contractual period	9 years

Operating Leases - Schedule of Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Assets
Operating lease right-of-use assets	$ 97,649	$ 68,608
Liabilities:
Accrued expenses and other current liabilities	15,601	7,675
Operating lease liabilities, noncurrent	90,415	64,792
Total operating lease liabilities	$ 106,016	$ 72,467
Weighted average remaining lease term	6 years 1 month 6 days	7 years 6 months
Weighted average discount rate	4.50%	5.10%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	zm:AccruedLiabilitiesAndOtherLiabilitiesCurrent	zm:AccruedLiabilitiesAndOtherLiabilitiesCurrent

Operating Leases - Schedule of Supplemental Cash flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Leases [Abstract]
Cash payments included in the measurement of our operating lease liabilities	$ 13,717	$ 9,774
Operating lease right-of-use assets recognized in exchange for new operating lease obligations	$ 39,918	$ 34,993

Operating Leases - Schedule of Future Minimum Lease Payments included in Measurement of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Operating Leases Future Minimum Lease Payments [Abstract]
2022	$ 19,949
2023	21,313
2024	20,310
2025	20,216
2026	15,384
Thereafter	24,808
Total operating lease payments	121,980
Less: imputed interest	(15,964)
Total operating lease liabilities	$ 106,016	$ 72,467

Commitments and Contingencies (Details) $ in Thousands				1 Months Ended	3 Months Ended	12 Months Ended
Commitments and Contingencies (Details) $ in Thousands	Jul. 30, 2020 officer	Jun. 11, 2020 officer	Apr. 08, 2020 officer	May 31, 2020 USD ($)	Jan. 31, 2021 USD ($)	Jan. 31, 2021 USD ($)	Jan. 31, 2020 USD ($)
Other Commitments [Line Items]
Purchase obligation					$ 498,600	$ 498,600
Payments for royalties				$ 9,800	9,800	10,600
Payments for legal settlements						9,800
Sales and other tax liabilities					85,600	85,600	$ 37,700
Sales and other tax liabilities					27,500	27,500	3,700
Sales and other tax liabilities					$ 58,133	$ 58,133	$ 33,957
Violation Of Securities Act Section 10(b), 20(a), and Rule 10b-5
Other Commitments [Line Items]
Loss contingency, number of defendants \| officer	8	9	2

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan - Additional Information (Details)					1 Months Ended	12 Months Ended
	Jan. 15, 2021 USD ($) $ / shares shares	Apr. 30, 2019 USD ($) shares	Apr. 23, 2019 USD ($) $ / shares shares	Apr. 18, 2019 shares	Apr. 30, 2019 USD ($) vote shares	Jan. 31, 2021 USD ($) $ / shares shares	Jan. 31, 2020 USD ($) $ / shares shares	Jan. 31, 2019 USD ($) $ / shares shares	Nov. 30, 2018 vote $ / shares shares	Jan. 31, 2018 USD ($) shares
Class of Stock [Line Items]
Convertible preferred stock, shares outstanding (in shares)						0	0	152,665,804		152,665,804
Conversion of convertible preferred stock to common stock upon initial public offering \| $							$ 0	$ 159,552,000		$ 159,552,000
Convertible preferred stock, shares issued (in shares)						0	0
Undesignated preferred stock shares authorized (in shares)						200,000,000	200,000,000
Undesignated referred stock par value (in dollars per share) \| $ / shares						$ 0.001	$ 0.001
Common stock, conversion features, term						6 months
Initial offering period						15 years
Common stock, par value (in dollars per share) \| $ / shares						$ 0.001	$ 0.001
Stock options outstanding (in shares)						9,239,504	16,833,009
Weighted average grant date fair value of options for employees (in dollars per share) \| $ / shares							$ 25.17	$ 6.28
Expected unrecognized stock-based compensation expenses related to outstanding unvested stock options \| $						$ 46,700,000
Number of shares available for future issuance (in shares)						68,708,474	60,911,996
Number of purchase periods \| vote					4
Fair value of donated shares \| $						$ 23,312,000
Other Assets, Non-current
Class of Stock [Line Items]
Capitalized deferred offering costs within other assets, non-current \| $								$ 2,400,000
RSUs
Class of Stock [Line Items]
Unrecognized stock-based compensation expenses \| $						$ 734,600,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period						2 years 8 months 12 days
Number of shares available for future issuance (in shares)						4,510,730	1,964,668
Purchase rights committed under the ESPP
Class of Stock [Line Items]
Unrecognized stock-based compensation expenses \| $						$ 31,900,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period						4 months 24 days
Number of shares available for future issuance (in shares)						724,883	1,323,662
Maximum number of shares per employee (in shares)					3,000
Consecutive offering period					27 months
Stock options
Class of Stock [Line Items]
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period						1 year 4 months 24 days
Number of shares available for future issuance (in shares)						9,239,504	16,833,009
2019 Plan
Class of Stock [Line Items]
Shares reserved for issuance, percentage		5.00%			5.00%
2019 Employee Stock Purchase Plan \| Purchase rights committed under the ESPP
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)						9,648,574	7,186,070
Percent of outstanding stock, maximum					1.00%
Number of additional shares allowable under the plan (in shares)					7,500,000
Initial public offering
Class of Stock [Line Items]
Convertible preferred stock, shares outstanding (in shares)			152,665,804
Conversion of convertible preferred stock to common stock upon initial public offering \| $			$ 159,600,000
Undesignated preferred stock shares authorized (in shares)			200,000,000
Undesignated referred stock par value (in dollars per share) \| $ / shares			$ 0.001
Over-Allotment Option
Class of Stock [Line Items]
Deferred offering costs, reclassified to stockholders' equity \| $		$ 6,400,000
Class A Common Stock
Class of Stock [Line Items]
Common stock number of votes per share \| vote									1
Common stock, shares authorized (in shares)						2,000,000,000	2,000,000,000		320,000,000
Common stock, par value (in dollars per share) \| $ / shares						$ 0.001			$ 0.001
Issuance of common stock reserved for charitable donation (in shares)						94,844	500,000
Class A Common Stock \| Held For Charitable Contributions
Class of Stock [Line Items]
Fair value of donated shares \| $						$ 23,300,000
Class A Common Stock \| Purchase rights committed under the ESPP
Class of Stock [Line Items]
Percentage of purchase price of common stock to fair market value of common stock on offering or purchase date					85.00%
ESPP excess rate purchase right, value \| $					$ 25,000
Shares issued of common stock (in shares)						923,553	490,268
Class A Common Stock \| 2011 Plan
Class of Stock [Line Items]
Other shares authorized (in shares)		24,300,889			24,300,889
Class A Common Stock \| 2019 Plan
Class of Stock [Line Items]
Number of shares authorized (in shares)		58,300,889			58,300,889
Number of additional shares authorized under the plan (in shares)		34,000,000			34,000,000
Class A Common Stock \| 2019 Employee Stock Purchase Plan \| Purchase rights committed under the ESPP
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)		9,000,000			9,000,000
Class A Common Stock \| Initial public offering
Class of Stock [Line Items]
Shares issued (in shares)			9,911,434
Conversion of convertible preferred stock to common stock upon initial public offering (in shares)			426,223
Class A Common Stock \| Over-Allotment Option
Class of Stock [Line Items]
Shares issued (in shares)	735,294			3,130,435
Shares issued, price per share (in dollars per share) \| $ / shares	$ 340.00		$ 36.00
Aggregate proceeds from shares issued \| $	$ 1,980,000,000.0		$ 447,900,000
Class A Common Stock \| Private Placement
Class of Stock [Line Items]
Shares issued (in shares)			2,777,777
Aggregate proceeds from shares issued \| $			$ 100,000,000.0
Class A Common Stock \| Follow-On Public Offering
Class of Stock [Line Items]
Shares issued (in shares)	5,882,353
Class B Common Stock
Class of Stock [Line Items]
Common stock number of votes per share \| vote									10
Common stock, shares authorized (in shares)						300,000,000	300,000,000		300,000,000
Common stock, par value (in dollars per share) \| $ / shares						$ 0.001			$ 0.001
Class B Common Stock \| Initial public offering
Class of Stock [Line Items]
Conversion of convertible preferred stock to common stock upon initial public offering (in shares)			152,665,804

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan - Schedule of Stock by Class Reserved for Future Issuance (Details) - shares	Jan. 31, 2021	Jan. 31, 2020
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)	68,708,474	60,911,996
Stock options
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)	9,239,504	16,833,009
RSUs
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)	4,510,730	1,964,668
ESPP
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)	724,883	1,323,662
2011 and 2019 Plan
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)	44,584,783	33,604,587
2019 Employee Stock Purchase Plan \| ESPP
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)	9,648,574	7,186,070

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan - Summary of Stock Option Activity Under Equity Incentive Plan (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Outstanding Stock Options
Beginning balance (in shares)	16,833,009
Granted (in shares)	0
Exercised (in shares)	(7,378,477)
Cancelled/forfeited/expired (in shares)	(215,028)
Ending balance (in shares)	9,239,504	16,833,009
Outstanding stock options, vested (in shares)	4,641,908
Weighted- Average Exercise Price
Beginning balance (in dollars per share)	$ 5.73
Granted (in dollars per share)	0
Exercised (in dollars per share)	3.87
Cancelled/forfeited/expired (in dollars per share)	8.05
Ending balance (in dollars per share)	7.17	$ 5.73
Weighted average exercise price, vested and exercisable (in shares)	$ 3.98
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted-average remaining contractual life (years)	7 years	7 years 7 months 6 days
Weighted-average remaining contractual life, vested and exercisable	6 years 7 months 6 days
Aggregate intrinsic value	$ 3,371,457	$ 1,191,881
Aggregate intrinsic value, exercised	1,786,657	$ 767,300	$ 60,800
Aggregate intrinsic value, vested and exercisable	$ 1,708,663

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan - Schedule of Assumptions for Employee Options at Grant Dates (Details) - Stock options	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility, minimum	49.90%	44.60%
Expected volatility, maximum	53.20%	48.20%
Risk-free interest rate, minimum	1.60%	2.60%
Risk-free interest rate, maximum	2.50%	3.10%
Expected dividend yield	0.00%	0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	5 years	5 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	6 years 1 month 6 days	6 years 2 months 12 days

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan - Summary of Restricted Stock Units Activity Under Equity Incentive Plan (Details) - RSUs	12 Months Ended
	Jan. 31, 2021 $ / shares shares
Unvested RSUs
Beginning balance (in units) \| shares	1,964,668
Granted (in units) \| shares	3,351,979
Vested (in units) \| shares	(625,163)
Cancelled/forfeited (in units) \| shares	(180,754)
Ending balance (in units) \| shares	4,510,730
Weighted-Average Grant Date Fair Value Per Share
Beginning balance (in dollars per unit) \| $ / shares	$ 79.11
Granted (in dollars per unit) \| $ / shares	241.32
Vested (in dollars per unit) \| $ / shares	86.29
Cancelled/forfeited (in dollars per unit) \| $ / shares	181.18
Ending balance (in dollars per unit) \| $ / shares	$ 194.57

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan - Fair Value of ESPP Purchase Rights Assumptions (Details) - Purchase rights committed under the ESPP	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility, minimum	40.30%	40.30%
Expected volatility, maximum	75.00%	56.20%
Risk-free interest rate, minimum	0.10%	1.50%
Risk-free interest rate, maximum	2.50%	2.50%
Expected dividend yield	0.00%	0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	6 months	6 months
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	2 years 1 month 6 days	2 years 1 month 6 days

Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan - Summary of Stock-based Compensation Expense by Line Item (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 275,818	$ 73,109	$ 8,941
Cost of revenue
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	34,960	7,860	1,119
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	50,161	11,645	1,369
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	146,377	41,465	3,540
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 44,320	$ 12,139	$ 2,913

Income Taxes - Components of the Net Income (Loss) before Provision of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Income Tax Disclosure [Abstract]
Domestic	$ 663,909	$ 16,268	$ (204)
Foreign	14,125	10,094	8,553
Total	$ 678,034	$ 26,362	$ 8,349

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
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-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
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Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

Income Taxes - Schedule of Current and Deferred Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Current:
Federal	$ 0	$ 0	$ 0
State	1,023	14	80
Foreign	3,933	2,226	685
Total current income tax expense	4,956	2,240	765
Deferred:
Federal	689	0	0
State	248	0	0
Foreign	(175)	(1,183)	0
Deferred income tax expense (benefit), total	762	(1,183)	0
Total provision for income taxes	$ 5,718	$ 1,057	$ 765

Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Income Tax Disclosure [Abstract]
Tax at federal statutory rate	$ 142,387	$ 5,536	$ 1,764
State taxes	636	14	67
Foreign rate differential	89	(2,096)	(1,627)
Stock-based compensation	(302,362)	(32,070)	1,662
Permanent items	2,228	1,009	809
Research and development credits	(3,170)	(2,808)	(289)
Tax uncertainties	(607)	1,019	515
Change in valuation allowance	165,869	30,932	(1,438)
Other	648	(479)	(698)
Total provision for income taxes	$ 5,718	$ 1,057	$ 765
Effective tax rate	0.80%	4.00%	9.20%

Income Taxes - Significant Components of Deferred Income Tax Assets (Details) - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Deferred Tax Assets, Net [Abstract]
Net operating loss carryforwards	$ 341,487	$ 37,507
Research and development credit carryforwards	12,191	5,701
Stock-based compensation	37,255	4,145
Accruals and reserves	29,195	11,586
Deferred revenue	6,565	5,234
Operating lease liabilities	27,842	17,716
Total deferred tax assets	454,535	81,889
Valuation allowance	(335,051)	(36,353)
Total deferred tax assets net of valuation allowance	119,484	45,536
Deferred Tax Liabilities, Net [Abstract]
Property and equipment and intangible assets	(17,229)	(6,744)
Deferred contract acquisition costs	(76,593)	(21,156)
Operating right-of-use assets	(25,550)	(16,453)
Total deferred tax liabilities	(119,372)	(44,353)
Net deferred tax assets	$ 112	$ 1,183

Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
Income Taxes - Narrative (Details) - USD ($)	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Tax Credit Carryforward [Line Items]
Increase (decrease) of valuation allowance	$ 298,700,000	$ 35,500,000	$ (2,300,000)
Unrecognized tax benefits, if recognized, would impact effective tax rate	2,000,000.0	2,000,000.0	1,000,000.0
Interest and penalties	100,000	300,000	$ 0
Interest and penalties, cumulative liability	200,000	$ 300,000
Federal Income Tax
Tax Credit Carryforward [Line Items]
Operating loss carryforward	1,264,300,000
Federal Income Tax \| Research and Development Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward	13,600,000
State Income Tax
Tax Credit Carryforward [Line Items]
Operating loss carryforward	797,000,000.0
State Income Tax \| Research and Development Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward	11,400,000
Foreign Tax
Tax Credit Carryforward [Line Items]
Operating loss carryforward	$ 34,100,000

Income Taxes - Reconciliation of Unrecognized Tax Position (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	$ 8,106	$ 2,778	$ 1,976
Increases related to current year’s tax positions	6,001	5,328	802
Increases related to prior year’s tax positions	314
Current year acquisitions	885
Lapse of statute of limitations	(422)
Ending Balance	$ 14,884	$ 8,106	$ 2,778

Net Income Per Share Attributable to Common Stockholders - Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Earnings Per Share, Basic [Abstract]
Net income									$ 672,316	$ 25,305	$ 7,584
Less: undistributed earnings attributable to participating securities									(789)	(3,555)	(7,584)
Net income attributable to common stockholders	$ 260,393	$ 198,440	$ 185,742	$ 27,036	$ 15,313	$ 2,207	$ 5,521	$ 198	$ 671,527	$ 21,750	$ 0
Earnings Per Share, Diluted [Abstract]
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic (in shares)									283,853,654	233,641,336	84,483,094
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted (in shares)									298,127,669	254,298,014	116,005,681
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)	$ 0.91	$ 0.70	$ 0.66	$ 0.10	$ 0.06	$ 0.01	$ 0.02	$ 0.00	$ 2.37	$ 0.09	$ 0.00
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ 0.87	$ 0.66	$ 0.63	$ 0.09	$ 0.05	$ 0.01	$ 0.02	$ 0.00	$ 2.25	$ 0.09	$ 0.00
Class A Common Stock
Earnings Per Share, Basic [Abstract]
Net income									$ 432,968	$ 5,450	$ 0
Less: undistributed earnings attributable to participating securities									0	0	0
Net income attributable to common stockholders									432,968	5,450	0
Reallocation of net income attributable to common stockholders									(14,321)	(439)	0
Net income attributable to common stockholders, diluted									$ 418,647	$ 5,011	$ 0
Earnings Per Share, Diluted [Abstract]
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic (in shares)									183,015,245	58,541,269	0
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted (in shares)									185,860,412	58,583,874	0
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)									$ 2.37	$ 0.09	$ 0
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)									$ 2.25	$ 0.09	$ 0
Class B Common Stock
Earnings Per Share, Basic [Abstract]
Net income									$ 239,348	$ 19,855	$ 7,584
Less: undistributed earnings attributable to participating securities									(789)	(3,555)	(7,584)
Net income attributable to common stockholders									238,559	16,300	0
Reallocation of net income attributable to common stockholders									14,321	439	0
Net income attributable to common stockholders, diluted									$ 252,880	$ 16,739	$ 0
Earnings Per Share, Diluted [Abstract]
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic (in shares)									100,838,409	175,100,067	84,483,094
Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted (in shares)									112,267,257	195,714,140	116,005,681
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)									$ 2.37	$ 0.09	$ 0.00
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)									$ 2.25	$ 0.09	$ 0.00

Net Income Per Share Attributable to Common Stockholders - Summary of Potential Shares of Common Stock Excluded from Computation of Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Details) - shares			12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Class A Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	405,156	500,000	165,336	1,929,417	0
Class A Common Stock \| Outstanding stock options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)			51,444	141,782	0
Class A Common Stock \| Unvested RSUs
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)			98,941	606,971	0
Class A Common Stock \| Purchase rights committed under the ESPP
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)			14,951	1,180,664	0
Class B Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)			0	0	3,541,878
Class B Common Stock \| Outstanding stock options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)			0	0	3,541,878
Class B Common Stock \| Unvested RSUs
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)				0	0
Class B Common Stock \| Purchase rights committed under the ESPP
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)				0	0

Net Income Per Share Attributable to Common Stockholders - Narrative (Details) - USD ($)			12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Class A Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Issuance of common stock reserved for charitable donation (in shares)	405,156	500,000	165,336	1,929,417	0
Convertible Promissory Notes
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Debt instrument term					3 years
Convertible Promissory Notes \| Dropbox
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Debt instrument face amount					$ 5,000,000.0
Interest rate percentage					2.75%
Convertible Promissory Notes \| Atlassian
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Debt instrument face amount					$ 10,000,000.0
Interest rate percentage					5.00%

Selected Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 882,485	$ 777,196	$ 663,520	$ 328,167	$ 188,251	$ 166,593	$ 145,826	$ 121,988	$ 2,651,368	$ 622,658	$ 330,517
Gross profit	615,201	518,469	471,249	224,460	155,704	135,748	117,926	97,884	1,829,379	507,262	269,516
Income (loss) from operations	256,117	192,242	188,104	23,385	10,553	(1,679)	2,265	1,557	659,848	12,696	6,167
Net income attributable to common stockholders	$ 260,393	$ 198,440	$ 185,742	$ 27,036	$ 15,313	$ 2,207	$ 5,521	$ 198	$ 671,527	$ 21,750	$ 0
Net income per share attributable to common stockholders:
Basic (in dollars per share)	$ 0.91	$ 0.70	$ 0.66	$ 0.10	$ 0.06	$ 0.01	$ 0.02	$ 0.00	$ 2.37	$ 0.09	$ 0.00
Diluted (in dollars per share)	$ 0.87	$ 0.66	$ 0.63	$ 0.09	$ 0.05	$ 0.01	$ 0.02	$ 0.00	$ 2.25	$ 0.09	$ 0.00

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Schedule II: Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Current Fiscal Year End Date	--01-31
Accounts receivable allowances
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 7,634	$ 2,071	$ 560
Additions	47,405	8,583	3,763
Write-offs or Deductions	(18,195)	(3,020)	(2,252)
Balance at End of Year	36,844	7,634	2,071
Deferred tax asset valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	36,353	877	3,154
Additions	298,698	35,476	0
Write-offs or Deductions	0	0	(2,277)
Balance at End of Year	$ 335,051	$ 36,353	$ 877

Label	Element	Value
Restricted Cash and Cash Equivalents, Noncurrent	us-gaap_RestrictedCashAndCashEquivalentsNoncurrent	$ 2,238,000
Restricted Cash and Cash Equivalents, Noncurrent	us-gaap_RestrictedCashAndCashEquivalentsNoncurrent	2,301,000
Restricted Cash and Cash Equivalents, Noncurrent	us-gaap_RestrictedCashAndCashEquivalentsNoncurrent	2,144,000
Restricted Cash and Cash Equivalents, Current	us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue	50,575,000
Restricted Cash and Cash Equivalents, Current	us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue	48,647,000
Restricted Cash and Cash Equivalents, Current	us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue	$ 200,000