# Antithesis funding rounds and investors

As of 14 Oct 2026, Antithesis has raised $105M across 1 verified round on record; latest: $105 million Series A led by Jane Street, announced 3 Dec 2025.

Antithesis is an autonomous software testing platform that finds the bugs others miss.

Website: https://antithesis.com  
Headquarters: Northern Virginia  
Page: https://fireround.dev/companies/antithesis.com

## Verified rounds

| Announced | Round | Amount | Lead investors | Other investors | Sources |
| --- | --- | --- | --- | --- | --- |
| 2025-12-03 | Series A | $105 million | Jane Street | Amplify Partners, Dwarkesh Patel, First In, Hyperion, Patrick Collison, Sholto Douglas, Spark Capital, Tamarack Global, Teamworthy Ventures | [prnewswire.com](https://www.prnewswire.com/news-releases/jane-street-leads-antithesiss-105m-series-a-to-make-deterministic-simulation-testing-the-new-standard-302631076.html) |

Source: Fireround (https://fireround.dev), an open-source funding feed. Each round is checked against the pages listed with it.