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Antithesis
About the Organisation
As AI drives down the cost of code, verifying it works reliably in production is the new bottleneck. Teams building software that can't fail - capital markets, databases, event streaming, blockchains, ledgers, distributed systems - use Antithesis to prevent outages and merge fearlessly, whether the code is written by humans or agents. Deterministic simulation runs your complete system on a custom hypervisor, stresses it with realistic clock, network, scheduling, and storage faults, feeds it toxic inputs, and explores thousands of scenarios in minutes. Every bug found comes back with an automated root cause and perfect reproducibility. Your team skips the flaky bug hunt and goes straight to the fix. Fast enough for CI, the local dev loop, or agents.
Products and Services
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Software Testing
Antithesis helps teams building financial infrastructure find software failures before they reach production. Our testing platform runs your system in a deterministic simulator, explores unexpected failure scenarios, and reproduces the bugs it finds so engineers and their agents can fix them before they reach production. For teams building payments, ledgers, and trading systems, that means testing whether money stays accounted for and services recover correctly when components fail. Antithesis is used by Jane Street and Formance.
