CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Redeemable Convertible Preferred Stock	Class A and Class B Common Stock	Additional Paid-in Capital	Accumulated Deficit
Redeemable convertible preferred stock, beginning balance (in shares) at Jan. 31, 2020		88,077,000
Redeemable convertible preferred stock, beginning balance at Jan. 31, 2020		$ 174,389
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of Series E redeemable convertible preferred stock, net of issuance costs of $276 (in shares)		6,051,000
Issuance of Series E redeemable convertible preferred stock, net of issuance costs of $276		$ 174,724
Redeemable convertible preferred stock, ending balance (in shares) at Jan. 31, 2021		94,128,000
Redeemable convertible preferred stock, ending balance at Jan. 31, 2021		$ 349,113
Beginning balance (in shares) at Jan. 31, 2020			61,447,000
Beginning balance at Jan. 31, 2020	$ (80,240)		$ 1	$ 52,208	$ (132,449)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)			4,131,000
Issuance of common stock upon exercise of stock options	2,629			2,629
Vesting of early exercised stock options	99			99
Stock-based compensation	39,223			39,223
Net loss	(83,515)				(83,515)
Ending balance (in shares) at Jan. 31, 2021			65,578,000
Ending balance at Jan. 31, 2021	(121,804)		$ 1	94,159	(215,964)
Redeemable convertible preferred stock, ending balance (in shares) at Jan. 31, 2022		0
Redeemable convertible preferred stock, ending balance at Jan. 31, 2022		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)		(94,128,000)	94,128,000
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	349,113	$ (349,113)	$ 1	349,112
Issuance of common stock upon initial public offering, net of underwriting discounts and issuance costs (in shares)			16,530,000
Issuance of common stock upon initial public offering, net of underwriting discounts and issuance costs	1,246,925		$ 1	1,246,924
Issuance of common stock for restricted stock awards (in shares)			11,000
Issuance of common stock upon exercise of stock options (in shares)			2,962,000
Issuance of common stock upon exercise of stock options	5,036			5,036
Vesting of early exercised stock options	18			18
Issuance of common stock upon settlement of restricted stock units (in shares)			4,355,000
Tax withholdings on settlement of restricted stock units (in shares)			(1,397,000)
Tax withholdings on settlement of restricted stock units	(110,989)			(110,989)
Stock-based compensation	204,130			204,130
Net loss	(290,138)				(290,138)
Ending balance (in shares) at Jan. 31, 2022			182,167,000
Ending balance at Jan. 31, 2022	1,282,291		$ 3	1,788,390	(506,102)
Redeemable convertible preferred stock, ending balance (in shares) at Jan. 31, 2023		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for restricted stock awards (in shares)			4,244,000
Issuance of common stock upon exercise of stock options (in shares)			2,856,000
Issuance of common stock upon exercise of stock options	5,034			5,034
Vesting of early exercised stock options	6			6
Tax withholdings on settlement of restricted stock units (in shares)			(13,000)
Tax withholdings on settlement of restricted stock units	(248)			(248)
Issuance of common stock under employee stock purchase plan (in shares)			714,000
Issuance of common stock under employee stock purchase plan	17,197			17,197
Stock-based compensation	175,368			175,368
Net loss	(274,298)				(274,298)
Ending balance (in shares) at Jan. 31, 2023			189,968,000
Ending balance at Jan. 31, 2023	$ 1,205,350		$ 3	$ 1,985,747	$ (780,400)