Equity Incentive Plans and Stock-based Compensation - Stock-Based Compensation Expense in Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 515,583	$ 86,167	$ 137,862
Cost of revenue | Subscription services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	12,232	513	834
Cost of revenue | Professional services and other
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	29,849	1,860	1,979
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	237,975	16,356	26,754
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	135,713	11,435	45,235
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 99,814	$ 56,003	$ 63,060