CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Cash flows from operating activities:
Net income	$ 103,711	$ 1,375,639	$ 672,316
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	1,285,752	477,287	275,818
Deferred income taxes	(160,961)	(327,957)	0
Amortization of deferred contract acquisition costs	259,368	177,283	104,306
Losses (gains) on strategic investments, net	37,571
Losses (gains) on strategic investments, net		(43,761)	(2,538)
Depreciation and amortization	82,321	48,188	28,857
Provision for accounts receivable allowances	50,285	36,747	32,007
Non-cash operating lease cost	28,933	18,387	10,887
Charitable donation of common stock	0	0	23,312
Amortization of discount/premium on marketable securities	1,206	25,316	5,433
Other	14,913	4,591	927
Changes in operating assets and liabilities:
Accounts receivable	(231,845)	(159,183)	(219,039)
Prepaid expenses and other assets	(18,066)	(155,934)	(68,521)
Deferred contract acquisition costs	(298,629)	(247,371)	(307,068)
Accounts payable	11,611	(2,218)	3,481
Accrued expenses and other liabilities	20,530	101,369	251,654
Deferred revenue	127,401	293,887	665,724
Operating lease liabilities, net	(23,839)	(17,004)	(6,379)
Net cash provided by operating activities	1,290,262	1,605,266	1,471,177
Cash flows from investing activities:
Purchases of marketable securities	(2,849,121)	(4,434,749)	(2,056,470)
Maturities of marketable securities	2,835,196	1,733,043	580,795
Sales of marketable securities	0	296,867	36,897
Purchases of property and equipment	(103,826)	(132,590)	(79,972)
Purchases of strategic investments	(69,050)	(305,149)	(13,000)
Cash paid for acquisition, net of cash acquired	(120,553)	(3,501)	(26,486)
Purchases of intangible assets	(11,268)	(13,018)	(5,843)
Other	300	0	1,659
Net cash used in investing activities	(318,322)	(2,859,097)	(1,562,420)
Cash flows from financing activities:
Cash paid for repurchases of common stock	(1,000,003)	0	0
Proceeds from issuance of common stock for employee stock purchase plan	53,710	59,331	38,433
Proceeds from exercise of stock options	8,577	14,404	28,550
Proceeds from employee equity transactions to be remitted (remitted) to employees and tax authorities, net	774	(40,004)	4,088
Proceeds from follow-on public offering, net of underwriting discounts and commissions and other offering costs	0	0	1,979,206
Other	0	337	0
Net cash (used in) provided by financing activities	(936,942)	34,068	2,050,277
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(8,108)	0	0
Net increase (decrease) in cash, cash equivalents, and restricted cash	26,890	(1,219,763)	1,959,034
Cash, cash equivalents, and restricted cash—beginning of year	1,073,353	2,293,116	334,082
Cash, cash equivalents, and restricted cash—end of year	1,100,243	1,073,353	2,293,116
Supplemental disclosures of cash flow information
Cash paid for income taxes, net	309,084	38,979	3,181
Supplemental disclosures of non-cash investing and financing information
Purchase of equipment during the period included in accounts payable and accrued expenses	11,946	13,728	34,514
Vesting of early exercised stock options	238	407	558
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	1,086,830	1,062,820	2,240,303
Restricted cash, current included in prepaid expenses and other current assets	13,141	10,236	50,575
Restricted cash, noncurrent included in other assets, noncurrent	272	297	2,238
Total cash, cash equivalents, and restricted cash	1,100,243	1,073,353	2,293,116
Class B
Cash flows from operating activities:
Net income	16,465	270,271	239,348
Class A
Cash flows from operating activities:
Net income	$ 87,246	$ 1,105,368	$ 432,968