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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2025
Stockholders' Equity Note [Abstract] |
Schedule of the reconciliation of shares of common stock issued and outstanding | ​
​ | ​ | ​ | ​
​ | December 31, 2025 | ​ | December 31, 2024
Class A Shares Outstanding | 321,551,078 | ​ | 317,676,034
Class B Shares Outstanding | 43,881,251 | ​ | 43,881,251
Total shares of common stock legally issued and outstanding | 365,432,329 | ​ | 361,557,285
Less: Shares subject to future vesting: | ​ | ​ | ​
Escrowed Earn-Out Shares | (27,690,978) | ​ | (27,690,978)
Sponsor Earn-Out Shares | (5,520,000) | ​ | (5,520,000)
Earn-Out Restricted Shares | (742,280) | ​ | (765,990)
RSAs | — | ​ | (255,458)
Total shares issued and outstanding | 331,479,071 | ​ | 327,324,859
Schedule of the shares of common stock available for future issuance | ​
​ | ​ | ​ | ​
​ | ​ | ​ | ​
​ | December 31, 2025 | ​ ​ ​ | December 31, 2024
Shares reserved for issuance under the SES AI Corporation 2021 Plan | 38,518,171 | ​ | 37,263,345
Common stock options outstanding | 5,431,725 | ​ | 6,063,110
Public Warrants | 9,199,947 | ​ | 9,199,947
Private Warrants | 5,013,333 | ​ | 5,013,333
RSUs | 13,883,881 | ​ | 13,282,923
PSUs | 5,963,154 | ​ | 5,973,050
Total common stock available for future issuance | 78,010,211 | ​ | 76,795,708

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