Balance Sheet Components - Summary of Property and Equipment Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Property Plant And Equipment [Line Items]
Total property and equipment	$ 19,670	$ 9,512
Less: accumulated depreciation and amortization	(3,773)	(1,277)
Property and equipment - net	15,897	8,235
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Total property and equipment	$ 1,266	1,224
Estimated Useful life	5 years
Computers Equipment and Software
Property Plant And Equipment [Line Items]
Total property and equipment	$ 532	389
Estimated Useful life	3 years
Capitalized Internal-use Software Development Costs
Property Plant And Equipment [Line Items]
Total property and equipment	$ 12,209	2,920
Estimated Useful life	5 years
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment	$ 5,008	$ 4,979
Estimated Useful life	Shorter of useful life or lease term
Construction in Progress
Property Plant And Equipment [Line Items]
Total property and equipment	$ 655