Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Class A and Class B Common Stock Class A and Class B Common Stock
Shares, beginning of period (in shares) at Jan. 31, 2021	167,058,113
Balance, beginning of period at Jan. 31, 2021	$ 621,139
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)	(167,058,113)
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	$ (621,139)
Shares, end of period (in shares) at Oct. 31, 2021	0
Balance, end of period at Oct. 31, 2021	$ 0
Shares, beginning of period (in shares) at Jan. 31, 2021					39,242,316
Balance, beginning of period at Jan. 31, 2021	(320,536)	$ 29,869	$ 165	$ (350,572)	$ 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)					169,787,200
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	621,139	621,129			$ 10
Issuance of common stock upon initial public offering and private placement, net of underwriting discounts and commissions (in shares)					41,678,568
Issuance of common stock upon initial public offering and private placement, net of underwriting discounts and commissions	1,380,960	1,380,956			$ 4
Issuance of common stock upon exercise of stock options (in shares)					6,352,005
Issuance of common stock upon exercise of options	8,630	8,630
Vesting of restricted stock units (in shares)					2,025
Vesting of early exercised stock options	566
Issuance of common stock upon exercise of warrants (in shares)					940,953
Vesting of early exercised stock options	563	563
Issuance of common stock and awards assumed in connection with acquisition (in shares)					7,277,214
Issuance of common stock assumed in connection with acquisition	120,319	120,318			$ 1
Issuance of restricted stock awards (in shares)					1,315,099
Stock-based compensation	66,473	66,473
Issuance of stock for services provided (in shares)					20,000
Issuance of restricted stock for services provided	500	500
Other comprehensive loss	0
Foreign currency translation adjustments	290		290
Net loss	(199,392)			(199,392)
Shares, end of period (in shares) at Oct. 31, 2021					266,615,380
Balance, end of period at Oct. 31, 2021	$ 1,678,946	2,228,438	455	(549,964)	$ 17
Shares, beginning of period (in shares) at Jul. 31, 2021	0
Balance, beginning of period at Jul. 31, 2021	$ 0
Shares, end of period (in shares) at Oct. 31, 2021	0
Balance, end of period at Oct. 31, 2021	$ 0
Shares, beginning of period (in shares) at Jul. 31, 2021					264,886,692
Balance, beginning of period at Jul. 31, 2021	1,715,968	2,196,865	455	(481,369)	$ 17
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)					1,726,663
Issuance of common stock upon exercise of options	2,803	2,803
Vesting of restricted stock units (in shares)					2,025
Vesting of early exercised stock options	9	9
Stock-based compensation	28,761	28,761
Other comprehensive loss	0
Foreign currency translation adjustments	0
Net loss	(68,595)			(68,595)
Shares, end of period (in shares) at Oct. 31, 2021					266,615,380
Balance, end of period at Oct. 31, 2021	$ 1,678,946	2,228,438	455	(549,964)	$ 17
Shares, beginning of period (in shares) at Jan. 31, 2022	0
Balance, beginning of period at Jan. 31, 2022	$ 0
Shares, end of period (in shares) at Oct. 31, 2022	0
Balance, end of period at Oct. 31, 2022	$ 0
Shares, beginning of period (in shares) at Jan. 31, 2022					270,451,615
Balance, beginning of period at Jan. 31, 2022	1,650,788	2,271,980	454	(621,673)	$ 27
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)					4,623,806
Issuance of common stock upon exercise of options	11,282	11,282
Vesting of restricted stock units (in shares)					705,572
Issuance of common stock under employee stock purchase plan (in shares)					405,534
Issuance of common stock under employee stock purchase plan	8,682	8,682
Cancellation of holdback shares (shares)					(9,551)
Vesting of early exercised stock options	18	18
Issuance of common stock and awards assumed in connection with acquisition (in shares)					6,032,231
Issuance of common stock assumed in connection with acquisition	186,332	186,331			$ 1
Stock-based compensation	120,986	120,986
Other comprehensive loss	(10,903)		(10,903)
Foreign currency translation adjustments	0
Net loss	(284,998)			(284,998)
Shares, end of period (in shares) at Oct. 31, 2022					282,209,207
Balance, end of period at Oct. 31, 2022	$ 1,682,187	2,599,279	(10,449)	(906,671)	$ 28
Shares, beginning of period (in shares) at Jul. 31, 2022	0
Balance, beginning of period at Jul. 31, 2022	$ 0
Shares, end of period (in shares) at Oct. 31, 2022	0
Balance, end of period at Oct. 31, 2022	$ 0
Shares, beginning of period (in shares) at Jul. 31, 2022					280,576,387
Balance, beginning of period at Jul. 31, 2022	1,739,816	2,549,614	(2,013)	(807,813)	$ 28
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)					1,254,653
Issuance of common stock upon exercise of options	2,900	2,900
Vesting of restricted stock units (in shares)					387,718
Cancellation of holdback shares (shares)					(9,551)
Stock-based compensation	46,765	46,765
Other comprehensive loss	(8,436)		(8,436)
Foreign currency translation adjustments	0
Net loss	(98,858)			(98,858)
Shares, end of period (in shares) at Oct. 31, 2022					282,209,207
Balance, end of period at Oct. 31, 2022	$ 1,682,187	$ 2,599,279	$ (10,449)	$ (906,671)	$ 28