# Antithesis funding: rounds and investors > Antithesis has raised $135M across 2 rounds since 2025. Investors include Spark Capital, Jane Street and Amplify Partners. Every round with its source. Source: https://millionrounds.com/company/antithesis (Millionrounds; every figure on the page links to its filing or article) United States · [Series A startup](https://millionrounds.com/companies) # Who invested in *Antithesis* 2 rounds we have observed, with the 11 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. AI Developer Tools Software Raised 11 months ago Follow Antithesis and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fantithesis) Funding summary Updated 5 Nov 2026 **$135M** raised across 2 rounds since 2025, from 2 sources **$30M** Venture **$105M** Series A - **Latest round:** Series A, $105M Dec 2025 - **Led by:** Jane Street - **Step-up i:** 3.5× - **Investors:** 11 (1 led) See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2026 **$30M** Venture **$105M** Series A - **First round:** Venture, $30M - **Biggest round:** $105M - **Between rounds:** 10 months ## The rounds - **Dec 2025** Series A **$105M** *9 new* *1 returning* [Jane Street](https://millionrounds.com/fund/jane-street) Lead [Spark Capital](https://millionrounds.com/fund/spark-capital) [Patrick Collison](https://millionrounds.com/fund/patrick-collison) [Tamarack Global](https://millionrounds.com/fund/tamarack-global-2) [Teamworthy Ventures](https://millionrounds.com/fund/teamworthy-ventures) [First In Ventures](https://millionrounds.com/fund/first-in-ventures) [Sholto Douglas](https://millionrounds.com/fund/sholto-douglas) [Amplify Venture Partners](https://millionrounds.com/fund/amplify-venture-partners) [Dwarkesh Patel](https://millionrounds.com/fund/dwarkesh-patel) [Hyperion Capital](https://millionrounds.com/fund/hyperion-capital) Reported by Ventureburn - **Feb 2025** Venture **$30M** *2 new* [Spark Capital](https://millionrounds.com/fund/spark-capital) [Amplify Partners](https://millionrounds.com/fund/amplify-partners) Source recorded ## Founders and team From Antithesis's own website: 2 founders, 12 on the team. **Will Wilson** CEO & Co-Founder **Dave Scherer** Co-Founder - **Akshay Shah** Field CTO, North America - **Ben Collins** Chief Technology Officer - **Max Jacobson** Field CTO, EMEA - **Nick Lavezzo** Chief Operations Officer - **Randall Jackson** Chief Revenue Officer - **Hao Guan** VP of Sales - **Jeremy King** VP of Product - **McKenna Dullea** Controller & VP of Finance - **Armaan Mehta** Engineer - **Mia Shaker** Senior Software Engineer - **Winter M.** Senior Software Engineer - **Yusuf Van Gieson** Senior Software Engineer ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Venture** 2025 **Series A** 2025 [Spark Capital](https://millionrounds.com/fund/spark-capital) [Jane Street](https://millionrounds.com/fund/jane-street) L [Amplify Partners](https://millionrounds.com/fund/amplify-partners) [Patrick Collison](https://millionrounds.com/fund/patrick-collison) [Tamarack Global](https://millionrounds.com/fund/tamarack-global-2) [Teamworthy Ventures](https://millionrounds.com/fund/teamworthy-ventures) [First In Ventures](https://millionrounds.com/fund/first-in-ventures) [Sholto Douglas](https://millionrounds.com/fund/sholto-douglas) [Amplify Venture Partners](https://millionrounds.com/fund/amplify-venture-partners) [Dwarkesh Patel](https://millionrounds.com/fund/dwarkesh-patel) ## Everyone who backed them [Spark Capital](https://millionrounds.com/fund/spark-capital) VC firm **2** rounds [Jane Street](https://millionrounds.com/fund/jane-street) Growth equity **1** round, led 1 [Amplify Partners](https://millionrounds.com/fund/amplify-partners) VC firm **1** round [Patrick Collison](https://millionrounds.com/fund/patrick-collison) Angel **1** round [Tamarack Global](https://millionrounds.com/fund/tamarack-global-2) VC firm **1** round [Teamworthy Ventures](https://millionrounds.com/fund/teamworthy-ventures) VC firm **1** round [First In Ventures](https://millionrounds.com/fund/first-in-ventures) VC firm **1** round [Sholto Douglas](https://millionrounds.com/fund/sholto-douglas) VC firm **1** round [Amplify Venture Partners](https://millionrounds.com/fund/amplify-venture-partners) VC firm **1** round [Dwarkesh Patel](https://millionrounds.com/fund/dwarkesh-patel) VC firm **1** round [Hyperion Capital](https://millionrounds.com/fund/hyperion-capital) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=antithesis). ## Also claim to have backed them These 7 firms list Antithesis as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above. [Frontline Ventures](https://millionrounds.com/fund/frontline-ventures) VC firm Per its own site [WorldQuant Ventures LLC](https://millionrounds.com/fund/worldquant-ventures-llc) VC firm Per its own site [First In](https://millionrounds.com/fund/first-in) VC firm Per its own site [BlueWing Ventures](https://millionrounds.com/fund/bluewing-ventures) VC firm Per its own site [Olima Ventures](https://millionrounds.com/fund/olima-ventures) VC firm Per its own site [The JHA Capital](https://millionrounds.com/fund/the-jha-capital) VC firm Per its own site [Wasson Enterprise](https://millionrounds.com/fund/wasson-enterprise) VC firm Per its own site ## Quick answers about Antithesis ### Who invested in Antithesis? Antithesis's investors include Spark Capital, Jane Street, Amplify Partners, Patrick Collison and Tamarack Global, and 6 more on record. Jane Street led its latest round. ### How much has Antithesis raised? Antithesis has raised $135M across 2 rounds since 2025. ### When did Antithesis last raise? Antithesis's most recent round was a Series A of $105M in Dec 2025, led by Jane Street. ### What was Antithesis's biggest round? Its most recent round, $105M in Dec 2025, is also its largest on record. ### Who backed Antithesis first? Antithesis's first round on record, in Feb 2025, was backed by Spark Capital and Amplify Partners. ### What stage is Antithesis at? Antithesis's latest named round is a Series A, in Dec 2025. ### Where is Antithesis based? Antithesis is based in the United States. ### Who led Antithesis's rounds? Jane Street led the Series A in 2025. ## Companies like Antithesis In the same sector, and raised in the last eighteen months. 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