Common Stock (Details)	6 Months Ended
	Jul. 31, 2021 vote $ / shares shares	Jan. 31, 2021 $ / shares shares
Class of Stock [Line Items]
Common stock, convertibility, percentage of outstanding share holders	6666.67%
Common stock, convertibility, number of years from final prospectus	7 years
Common stock, convertibility, percentage of shares outstanding	25.00%
Common stock, convertibility, death or disability period	12 months
Conversion of redeemable convertible preferred stock (in shares)	0	168,951,059
Exercise of common stock warrants (in shares)	0	954,884
Stock options outstanding (in shares)	48,385,470	37,231,191
Stock options available for future grants (in shares)	38,570,306	5,642,142
Total shares of common stock reserved	87,302,259	212,779,276
RSUs
Class of Stock [Line Items]
RSUs outstanding (in shares)	346,483	0
Class A
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	1,500,000,000	0
Common stock, number of voting rights | vote	1
Common stock, par or stated value per share (in USD per share) | $ / shares	$ 0.0001	$ 0.0001
Class B Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	300,000,000	264,659,000
Common stock, number of voting rights | vote	20
Common stock, par or stated value per share (in USD per share) | $ / shares	$ 0.0001	$ 0.0001