Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
CASH FLOW FROM OPERATING ACTIVITIES:
Net loss	$ (271,101)	$ (117,573)	$ (76,567)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	7,909	2,837	1,855
Amortization of deferred contract acquisition costs	21,670	11,518	5,749
Non-cash operating lease costs	2,862	3,085	0
Stock-based compensation expense	87,889	15,912	4,346
Other	(456)	(22)	(35)
Changes in operating assets and liabilities, net of effects of acquisition
Accounts receivable	(59,082)	(8,320)	(18,986)
Prepaid expenses and other current assets	(7,319)	(9,438)	(1,237)
Deferred contract acquisition costs	(53,565)	(26,934)	(14,606)
Accounts payable	(2,076)	7,429	2,854
Accrued liabilities	18,080	1,374	643
Accrued payroll and benefits	41,462	7,758	5,644
Operating lease liabilities	(3,139)	(3,261)	0
Deferred revenue	115,142	49,065	46,264
Other liabilities	6,136	0	(348)
Net cash used in operating activities	(95,588)	(66,570)	(44,424)
CASH FLOW FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(3,653)	(3,283)	(953)
Purchases of intangible assets	(802)	(224)	(200)
Capitalization of internal-use software	(5,839)	(2,758)	(1,700)
Purchases of strategic investments	(6,000)	0	(334)
Cash paid for acquisition, net of cash and restricted cash acquired	(3,449)	0	0
Net cash used in investing activities	(19,743)	(6,265)	(3,187)
CASH FLOW FROM FINANCING ACTIVITIES:
Proceeds from issuance of Series D redeemable convertible preferred stock, net of issuance costs	0	0	51,871
Proceeds from issuance of Series E redeemable convertible preferred stock, net of issuance costs	0	152,539	0
Proceeds from issuance of Series F redeemable convertible preferred stock, net of issuance costs	0	266,774	0
Payments of deferred offering costs	(7,416)	0	0
Proceeds from revolving line of credit	0	19,857	0
Repayment of debt	(20,000)	(20,000)	0
Proceeds from exercise of stock options	14,622	4,608	899
Proceeds from exercise of warrants	0	200	0
Proceeds from initial public offering and private placement, net of underwriting discounts and commissions	11,356	0	0
Proceeds from initial public offering and private placement, net of underwriting discounts and commissions	1,388,562	0	0
Net cash provided by financing activities	1,387,124	423,978	52,770
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	1,146	289	36
NET INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	1,272,939	351,432	5,195
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH–Beginning of period	399,112	47,680	42,485
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH–End of period	1,672,051	399,112	47,680
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest paid	409	1,379	1,844
Income taxes paid, net	583	298	363
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Stock-based compensation capitalized as internal-use software	4,779	46	13
Property and equipment purchased but not yet paid	913	78	152
Vesting of early exercised stock options	575	71	68
Deferred offering costs accrued but not yet paid	186	0	0
Issuance of common stock and assumed equity awards in connection with acquisition	120,319	0	0
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	$ 621,139	$ 0	$ 0