Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
CASH FLOW FROM OPERATING ACTIVITIES:
Net loss	$ (378,678)	$ (271,101)	$ (117,573)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	29,721	7,909	2,837
Amortization of deferred contract acquisition costs	36,417	21,670	11,518
Non-cash operating lease costs	3,559	2,862	3,085
Stock-based compensation expense	164,466	87,889	15,912
Loss on investments, accretion of discounts, and amortization of premiums on investments, net	(12,217)	0	0
Other	(1,187)	(456)	(22)
Changes in operating assets and liabilities, net of effects of acquisition
Accounts receivable	(44,442)	(59,082)	(8,320)
Prepaid expenses and other current assets	(14,499)	(7,319)	(9,438)
Deferred contract acquisition costs	(61,289)	(53,565)	(26,934)
Accounts payable	3,670	(2,076)	7,429
Accrued liabilities	4,976	18,080	1,374
Accrued payroll and benefits	(7,205)	41,462	7,758
Operating lease liabilities	(5,320)	(3,139)	(3,261)
Deferred revenue	92,496	115,142	49,065
Other liabilities	(3,755)	6,136	0
Net cash used in operating activities	(193,287)	(95,588)	(66,570)
CASH FLOW FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(4,953)	(3,653)	(3,283)
Purchases of intangible assets	(407)	(802)	(224)
Capitalization of internal-use software	(13,452)	(5,839)	(2,758)
Purchases of investments	(1,938,007)	(6,000)	0
Maturities of investments	925,185	0	0
Cash paid for acquisition, net of cash acquired	(281,032)	(3,449)	0
Net cash used in investing activities	(1,312,666)	(19,743)	(6,265)
CASH FLOW FROM FINANCING ACTIVITIES:
Proceeds from issuance of Series E redeemable convertible preferred stock, net of issuance costs	0	0	152,539
Proceeds from issuance of Series F redeemable convertible preferred stock, net of issuance costs	0	0	266,774
Payments of deferred offering costs	(186)	(7,416)	0
Proceeds from revolving line of credit	0	0	19,857
Repayment of debt	0	(20,000)	(20,000)
Proceeds from exercise of stock options	17,335	14,622	4,608
Proceeds from exercise of warrants	0	0	200
Proceeds from issuance of common stock under the employee stock purchase plan	19,159	11,356	0
Proceeds from initial public offering and private placement, net of underwriting discounts and commissions	0	1,388,562	0
Net cash provided by financing activities	36,308	1,387,124	423,978
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0	1,146	289
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	(1,469,645)	1,272,939	351,432
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH–Beginning of period	1,672,051	399,112	47,680
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH–End of period	202,406	1,672,051	399,112
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest paid	17	409	1,379
Income taxes paid, net	500	583	298
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Stock-based compensation capitalized as internal-use software	4,020	4,779	46
Property and equipment purchased but not yet paid	203	913	78
Vesting of early exercised stock options	103	575	71
Deferred offering costs accrued but not yet paid	0	186	0
Issuance of common stock and assumed equity awards in connection with acquisition	186,332	120,319	0
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	$ 0	$ 621,139	$ 0