Equity Incentive Plans and Stock-Based Compensation (Tables)

12 Months Ended

Jan. 31, 2022

Share-based Payment Arrangement [Abstract]

Summary of Option Activity Under Stock Plans

Stock option activity during fiscal year 2022 was as follows:

	Options Outstanding
	Stock Options (in thousands)	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value (in thousands)
Balance as of January 31, 2021	23,013	$	1.58	7.9	$	1,207,831
Granted	2,041	$	0.10
Exercised	(10,048)	$	1.16
Forfeited	(455)	$	2.55
Expired	(7)	$	2.40
Balance as of January 31, 2022	14,544	$	1.64	7.6	$	507,419
Vested and exercisable as of January 31, 2022	7,389	$	1.54	6.9	$	258,486

Schedule of Fair Value Assumptions for Stock Options

Fair value of each stock option grant was estimated on the date of grant using the Black-Scholes pricing model with the following assumptions:

	2022		2021	2020
	Weighted-Average	Range	Range	Range
Expected term (years)	6.1	5.6 – 6.1	5.0 – 6.1	5.0 – 6.1
Expected volatility	57.2%	55.4% – 60.0%	60.0% – 61.1%	40.0% – 68.0%
Risk-free interest rate	1.4%	0.9% – 1.7%	0.2% – 0.7%	1.3% – 2.9%
Expected dividend yield	0.0%	0.0%	0.0%	0.0%

Summary of RSU Activity

RSU activity during fiscal year 2022 was as follows:

	RSUs (in thousands)	Weighted-Average Grant Date Fair Value Per Share
Unvested as of January 31, 2021	34,753	$	10.80
Granted	19,695	$	45.09
Vested	(25,283)	$	9.98
Forfeited	(1,650)	$	24.82
Unvested as of January 31, 2022	27,515	$	35.35

Schedule of Fair Value Assumptions for ESPP Shares

The fair value of ESPP awards was estimated using the Black-Scholes option pricing model with the following weighted average assumptions:

	Year Ended January 31,
	2022
Expected term (years)	0.6
Expected volatility	55.7%
Risk-free interest rate	0.05%
Expected dividend yield	0.0%

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense is classified in the consolidated statements of operations as follows (in thousands):

	Year Ended January 31,
	2022		2021		2020
Cost of subscription services revenue	$	12,232	$	513	$	834
Cost of professional services and other revenue	29,849		1,860		1,979
Sales and marketing	237,975		16,356		26,754
Research and development	135,713		11,435		45,235
General and administrative	99,814		56,003		63,060
Total	$	515,583	$	86,167	$	137,862