Antithesis is an autonomous software testing platform that finds bugs in complex, distributed systems and reproduces them exactly every time. Will Wilson and Dave Scherer founded the company in 2018 in Vienna, Virginia; both were part of the team behind FoundationDB, the distributed database Apple acquired in 2015.
The platform runs an application inside a custom hypervisor that can rewind time, replay alternate execution paths, and inject faults into the clock, network, and storage layers, then autonomously explores those conditions to surface edge-case bugs before they reach production. Because every run is deterministic, a bug Antithesis finds can be replayed exactly, removing the 'works on my machine, can't reproduce it' problem that plagues distributed-systems debugging.
Antithesis is built for engineering teams running mission-critical, complex distributed systems — customers include Palantir, MongoDB, and Ethereum-adjacent projects. Pricing runs on usage, with on-demand compute available through AWS Marketplace around $2 per CPU-hour; most customers get a custom quote, and the company has raised over $150 million combined across its seed and Series A rounds.
