Antithesis Secures $105M Series A Led by Jane Street to Fortify Ethereum Stress-Testing Simulations

COINOTAG News reported on December 3, citing CoinDesk, that Antithesis has closed a Series A round totaling $105 million, led by Jane Street, with support from Amplify Venture Partners, Spark Capital, Tamarack Global, and notable angel investors.

Antithesis delivers deterministic simulation testing for never-down systems such as blockchain networks, enabling full-scale, production-grade scenarios to surface edge-case conditions that could trigger operational outages on live ledgers.

The deal signals growing demand for formal validation tools in crypto infrastructure, illustrating investor interest from finance and tech luminaries, including Patrick Collison, co-founder of Stripe, who participated in the round.

Historically, Ethereum researchers leveraged Antithesis’ simulated workloads to assess resilience before the Merge to proof-of-stake, helping identify vulnerabilities under stressed conditions prior to network upgrade.