Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
CASH FLOW FROM OPERATING ACTIVITIES:
Net loss	$ (199,392)	$ (79,732)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	5,862	2,026
Amortization of deferred contract acquisition costs	14,551	7,703
Non-cash operating lease costs	2,180	2,391
Stock-based compensation expense	62,193	9,834
Other	849	235
Changes in operating assets and liabilities, net of effects of acquisition
Accounts receivable	(26,322)	4,302
Prepaid expenses and other assets	(6,916)	(1,802)
Deferred contract acquisition costs	(28,436)	(13,710)
Accounts payable	(5,658)	2,743
Accrued liabilities	9,900	1,704
Accrued payroll and benefits	19,774	1,827
Operating lease liabilities	(2,288)	(2,713)
Deferred revenue	60,037	21,916
Other liabilities	3,663	0
Net cash used in operating activities	(90,003)	(43,276)
CASH FLOW FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(3,268)	(1,634)
Purchases of intangible assets	(520)	(182)
Capitalization of internal-use software	(4,733)	(2,130)
Cash paid for acquisition, net of cash and restricted cash acquired	(3,449)	0
Net cash used in investing activities	(11,970)	(3,946)
CASH FLOW FROM FINANCING ACTIVITIES:
Proceeds from issuance of Series E redeemable convertible preferred stock, net of issuance costs	0	152,539
Proceeds from issuance of Series F redeemable convertible preferred stock, net of issuance costs	0	266,774
Payments of deferred offering costs	(7,416)	0
Proceeds from revolving line of credit	0	19,857
Repayment of debt	(20,000)	(20,000)
Proceeds from exercise of stock options	8,630	2,996
Proceeds from initial public offering and private placement, net of underwriting discounts and commissions	1,388,562	0
Net cash provided by financing activities	1,369,776	422,166
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	1,146	(18)
NET INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	1,268,949	374,926
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH–Beginning of period	399,112	47,680
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH–End of period	1,668,061	422,606
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest paid	406	1,107
Income taxes paid, net	156	0
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Stock-based compensation capitalized as internal-use software	4,280	34
Property and equipment purchased but not yet paid	443	16
Vesting of early exercised options	566	52
Deferred offering costs accrued but not yet paid	186	0
Issuance of common stock and assumed equity awards in connection with acquisition	120,319	0
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	$ 621,139	$ 0