Preferred Stock - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Jul. 31, 2021	Jan. 31, 2022	Jan. 31, 2021	Jul. 01, 2021	Jan. 31, 2020	Jan. 31, 2019
Temporary Equity [Line Items]
Redeemable convertible preferred stock, shares outstanding (in shares)		0	167,058,113		113,523,948	97,686,390
Preferred stock, shares authorized (in shares)		50,000,000	0
Preferred stock, par or stated value per share (in USD per share)		$ 0.0001	$ 0.0001
Preferred stock, shares outstanding (in shares)		0	0
Redeemable convertible preferred stock
Temporary Equity [Line Items]
Redeemable convertible preferred stock, shares outstanding (in shares)				167,058,113
Class B Common Stock
Temporary Equity [Line Items]
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, not on a one-for-one basis (in shares)	34,134,270
Series E
Temporary Equity [Line Items]
Redeemable convertible preferred stock, shares outstanding (in shares)			31,405,183	31,405,183
Issuance of Preferred Stock, net of issuance costs (in shares)		31,405,183	31,405,183
Original issuance price per share (in USD per share)		$ 4.8617	$ 4.8617
Proceeds from issuance of Series E redeemable convertible preferred stock, net of issuance costs		$ 152.5
Temporary equity, issuance costs		$ 0.1
Series F
Temporary Equity [Line Items]
Redeemable convertible preferred stock, shares outstanding (in shares)			22,128,982
Issuance of Preferred Stock, net of issuance costs (in shares)		22,128,982	22,128,982
Original issuance price per share (in USD per share)		$ 12.0614	$ 12.0614
Proceeds from issuance of Series E redeemable convertible preferred stock, net of issuance costs		$ 266.8
Temporary equity, issuance costs		$ 0.1