Antithesis

Antithesis is an autonomous software testing company founded in 2018 by the team that built FoundationDB. Its business is a single, well-defined problem: finding software defects before release by exhaustively exploring how a system behaves. The company describes its work as quietly reinventing how the world thinks about software reliability, with an emphasis on engineering rigour.

The Antithesis testing platform combines fully deterministic, massively parallel simulation testing with intelligent guidance, property-based testing and sophisticated fault injection. The system explores thousands of alternate execution paths through a given piece of software. Because the simulation is deterministic, every bug it uncovers is perfectly reproducible, and each finding is delivered with root cause analysis and complete reproduction steps rather than a stack trace to be chased.

The technical domains at the company cover deterministic simulation testing, fault injection, distributed systems, reproducible debugging and root cause analysis. Antithesis targets customers whose software is hardest to test conventionally: databases, distributed systems, fintech, blockchain and software development tooling. The stated aim for these engineering teams is to ship with confidence.