Employee Stock Plans - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	$ 39,549	$ 29,822	$ 69,948	$ 58,100
Capitalized stock-based compensation expense	478	645	1,051	1,242
Total stock-based compensation expense	40,027	30,467	70,999	59,342
Cost of revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	1,348	1,078	2,425	2,042
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	12,138	9,892	22,149	19,337
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	14,091	11,448	25,427	22,280
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	$ 11,972	$ 7,404	$ 19,947	$ 14,441

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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