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Redeemable Convertible Preferred Stock - Summary of Redeemable Convertible Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands | Jan. 31, 2026 | Dec. 14, 2025 | Jan. 31, 2025 | Jan. 31, 2024 | Jan. 31, 2023
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Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) | 0 |  | 85,490,483 |  |
Redeemable convertible preferred stock, shares issued (in shares) | 0 |  | 69,914,359 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) | 0 |  | 69,914,359 | 69,914,359 | 69,914,359
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value | $ 0 | $ 227,200 | $ 227,198 | $ 227,198 | $ 227,198
Redeemable convertible preferred stock, liquidation preference | $ 0 |  | $ 229,543 |  |
Series A Preferred Stock |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 1,350,000 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 1,350,000 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 1,350,000 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 0.11 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.0089 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 148 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 149 |  |
Series B Preferred Stock |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 7,658,874 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 7,658,868 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 7,658,868 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 0.39 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.0310 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 2,951 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 2,987 |  |
Series C Preferred Stock |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 6,169,302 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 5,952,858 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 5,952,858 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 1.27 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.1016 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 7,529 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 7,560 |  |
Series D Preferred Stock |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 14,431,860 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 14,431,844 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 14,431,844 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 1.36 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.1086 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 19,482 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 19,627 |  |
Series E Preferred Stock |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 8,780,133 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 8,780,133 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 8,780,133 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 3.99 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.3190 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 34,913 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 35,033 |  |
Series F Preferred Stock |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 7,938,238 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 7,816,435 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 7,816,435 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 8.21 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.6568 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 64,087 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 64,173 |  |
Series G Preferred Stock |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 19,516,000 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 18,889,279 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 18,889,279 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 3.97 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.3178 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 72,132 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 74,990 |  |
Redeemable Convertible Preferred Stock Series G-1 |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 5,034,942 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 5,034,942 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 5,034,942 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 4.97 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.3973 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 25,956 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 25,024 |  |
Redeemable Convertible Preferred Stock Series H-1 |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 7,305,567 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 0 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 0 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 9.54 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.7633 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 0 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 0 |  |
Redeemable Convertible Preferred Stock Series H-2 |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |
Redeemable convertible preferred stock, shares authorized (in shares) |  |  | 7,305,567 |  |
Redeemable convertible preferred stock, shares issued (in shares) |  |  | 0 |  |
Redeemable convertible preferred stock, shares outstanding (in shares) |  |  | 0 |  |
Redeemable convertible preferred stock, share issuance price (in dollars per share) |  |  | $ 9.54 |  |
Redeemable convertible preferred stock, dividend per share (in dollars per share) |  |  | $ 0.7633 |  |
Redeemable convertible preferred stock, liquidation preference, Net Carrying Value |  |  | $ 0 |  |
Redeemable convertible preferred stock, liquidation preference |  |  | $ 0 |  |

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