Antithesis is an application security testing platform, headquartered in Vienna, United States, founded in 2018.
| Date | Round | Amount | Investors |
|---|---|---|---|
| 2025-12-03 | Series A | $105M | Jane Street Capital, Amplify Partners, Dwarkesh Patel, First In Ventures, Hyperion Capital Partners, Patrick Collison, Sholto Douglas, Spark Capital, Tamarack Global, Teamworthy Ventures |
| 2025-02-10 | Growth Stage | $30M | Amplify Partners, Spark Capital |
| 2024-02-13 | Seed | $47M | Amplify Partners, First In, Tamarack Global, Howard Lerman, Michael Walrath |
Data from The Signal by Return on Security — cybersecurity funding, M&A activity, and company intelligence.