Stock-Based Compensation (Tables)

12 Months Ended

Jan. 31, 2022

Share-based Payment Arrangement [Abstract]

Nonvested Restricted Stock Shares Activity

A summary of our RSUs under the 2021 Plan is as follows:

	Number of Shares	Weighted-Average Grant Date Fair Value
Outstanding as of January 31, 2021	—	$	—
Granted	1,491,253	$	57.17
Released	(11,902)	$	62.60
Forfeited	(41,998)	$	54.29
Outstanding as of January 31, 2022	1,437,353	$	57.21

A summary of our RSUs under the 2013 Plan is as follows:

	Number of Shares	Weighted-Average Grant Date Fair Value
Outstanding as of January 31, 2021	—	$	—
Granted	346,483	$	32.39
Released	(3,316)	$	32.69
Forfeited	(10,216)	$	32.48
Outstanding as of January 31, 2022	332,951	$	32.38

Share-based Payment Arrangement, Option, Activity

A summary of our stock option plan activity under the 2013 Plan is as follows:

	Number of Options	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of January 31, 2021	37,231,191	$	1.68	8.34	$	442,515
Granted	14,048,623	$	9.66
Exercised	(8,406,950)	$	1.52
Forfeited	(1,131,723)	$	3.34
Outstanding as of January 31, 2022	41,741,141	$	4.34	7.95	$	1,686,738
Expected to vest as of January 31, 2022	41,741,141	$	4.34	7.95	$	1,686,738
Vested and exercisable as of January 31, 2022	17,467,223	$	2.47	7.16	$	738,584

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

	Year Ended January 31,
	2022		2021
Expected term (in years)	6.0		6.0
Expected volatility	62.3% - 66.0%		47.3% - 48.7%
Risk-free interest rate	0.8% - 1.1%		0.4% - 0.6%
Dividend yield	—	%	—	%

Schedule of Components of Stock-based Compensation Expense

The components of stock-based compensation expense recognized in the consolidated statements of operations consisted of the following (in thousands):

	Year Ended January 31,
	2022		2021
Cost of revenue	$	3,618	$	308
Research and development	35,358		6,590
Sales and marketing	15,460		3,835
General and administrative	33,453		5,179
Total	$	87,889	$	15,912

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

The following table summarizes assumptions used in estimating the fair value of employee stock purchase rights for the initial and second offering period under the 2021 ESPP using the Black-Scholes option pricing model:

	Year Ended  January 31, 2022
Expected term (in years)	0.5 - 2
Expected volatility	52.3% - 70.5%
Risk-free interest rate	0.1% - 0.3%
Dividend yield	—	%