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Stock-Based Compensation - Summary of Components of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Oct. 31, 2025 | Oct. 31, 2024 | Oct. 31, 2025 | Oct. 31, 2024
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | $ 59,308 | $ 55,584 | $ 174,960 | $ 161,857
Cost of Revenue |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | 5,602 | 4,640 | 16,100 | 13,992
Research and Development |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | 20,316 | 19,925 | 60,502 | 57,420
Sales and Marketing |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | 20,095 | 19,635 | 57,641 | 56,591
General and Administrative |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Stock-based compensation expense | $ 13,295 | $ 11,384 | $ 40,717 | $ 33,854

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