Equity Incentive Plans and Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended			12 Months Ended
	Jul. 29, 2022	Apr. 23, 2021	Apr. 22, 2021	Sep. 30, 2020	Jul. 31, 2020	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021	Apr. 30, 2021	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested options expiration period after termination of employment						3 months
Weighted-average grant date fair value of stock options granted (in dollars per share)						$ 12.23	$ 45.78	$ 17.45
Intrinsic value of stock options exercised						$ 83,600	$ 557,500	$ 839,000
Stock-based compensation expense						369,840	515,583	86,167
Cost not yet recognized for unvested options					$ 700	122,900
Repurchase of unvested early exercised stock options						1,493	0	0
Restricted stock awards issued, value						1		373
Capitalized stock-based compensation expenses relating to software development cost						$ 0	$ 4,500	$ 300
Re:infer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average remaining period for cost recognition						2 years 6 months
Unrecognized compensation expense						$ 6,400
Stock issued at closing subject to clawback provisions (in shares)	400,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuances (in shares)			15,500,000
Period of shares automatically increase			10 years
Percentage of total number of shares			1.00%
Number of shares authorized (in shares)						15,900,000
Weighted-average remaining period for cost recognition						4 months 24 days
Unrecognized compensation expense						$ 2,900
Shares purchased (in shares)						1,200,000
Purchase price (in dollars per share)						$ 13.28
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						4 years
Award expiration period						10 years
Accelerated vesting shares (in shares)						300,000	200,000	300,000
Incremental expense					$ 1,600	$ 2,800	$ 2,900	$ 4,600
Awards modified (in shares)					4,600,000
Stock-based compensation expense					$ 900
Weighted-average remaining period for cost recognition						2 years 8 months 12 days
Early Exercised Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of unvested early exercised stock options						$ 1,500
Accrued proceeds from unvested early exercised stock options						$ 2,800	$ 2,800
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated vesting shares (in shares)						500,000	200,000
Incremental expense							$ 10,900
Weighted-average remaining period for cost recognition						2 years 9 months 18 days
Fair value of RSUs vested						$ 228,800	$ 1,400,000	$ 0
Expense acceleration						2,200
Unrecognized compensation expense						$ 703,300
Grant date fair value per share (in dollars per share)						$ 15.85
Share-Based Payment Arrangement, Plan Modification, Net Reduction In Award Fair Value						$ (7,400)
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				4 years
Weighted-average remaining period for cost recognition						1 year 7 months 6 days
Unrecognized compensation expense						$ 1,600
Restricted stock awards issued (in shares)				100,000
Grant date fair value per share (in dollars per share)				$ 33.22
Restricted stock awards issued, value				$ 4,000
Class A Common Stock | ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock, offering date, percent of market price			85.00%
Purchase price of common stock, purchase date, percent of market price			85.00%
Class A Common Stock | Early Exercised Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of unvested early exercised stock options (in shares)						400,000
2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of shares automatically increase			10 years
Percentage of total number of shares			5.00%
2021 Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period						4 years
2021 Plan | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuances (in shares)						145,900,000
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuances (in shares)										0
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future issuances (in shares)									0
2018 Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 233,000
Award service period						4 years