TYSONS CORNER, Va., Dec. 3, 2025 /PRNewswire/ -- Antithesis today announced a $105 million Series A round led by Jane Street, the global technology-driven quantitative trading firm known for building some of the world's most advanced software systems. The investment underscores Antithesis's emergence as critical infrastructure for enterprises operating complex, distributed systems. Jane Street is both an Antithesis investor and customer.

Since the dawn of Middle Earth, it has been somewhat widely accepted that it takes 8-10 years to build a real database. There’s a lot that has to go right; databases need to be rock solid. They need to be battle tested, consistent, fault tolerant, and most of all, trustworthy. These are things that take time to dial in.

But in 2009 a small team of childhood friends in Virginia somehow broke the rule. In a few short years the Daves (Rosenthal and Scherer) and Nick built something that everyone said they couldn’t: a distributed storage engine with ACID guarantees. It was called FoundationDB, it took the world by storm, and then it got acquired in 2015 by Apple (you can still download and use it here). 

VIENNA, Va., Feb. 13, 2025 /PRNewswire/ --Antithesis, the autonomous software testing company, today marks its first year anniversary since launching out of stealth with the announcement of new funding and the expansion of its customer base, employee count, and board.

Software testing is hard. Even with the right talent in place, it doesn’t always go as planned — particularly when executed at scale. In a 2020 survey from Electric Cloud, 58% of developers blamed software bugs on test infrastructure and process issues — not design defects.

The market for software testing solutions is quite massive, unsurprisingly, with one estimate pegging it at $55.98 billion. There’s plenty of vendors in the space, from startups like Qase, EvaluAgent and Codegen to incumbents like Azure and AWS.

But a new entrant, Antithesis, thinks it can make a splash.