Antithesis: autonomous software testing

Validate your system like:

Snouty

What is Antithesis?

Antithesis de-risks agentic development of critical systems. Our platform runs your complete system, exhaustively analyzes its behavior, and exposes bugs as quickly as agents introduce them. We arm your team with a root cause and a perfect reproduction of every issue found.

We discover the bugs others miss -- without human review, false positives, or risking production.

How it works

Industry solutions

Redefining reliability for critical systems

Money movement has no margin for error

Decentralized doesn’t have to mean unpredictable

Scale without leaving correctness behind

Cloud infrastructure

Catch the cracks before they take down the stack

Verify changes in the development loop

Antithesis arms agents with better feedback than traditional testing.

Release safer

Prevent outages by catching unknown unknowns before production.

Release faster

Help agents produce bug-free code by giving them high-signal correctness feedback.

Build braver

Deploy agents on ambitious, high-impact projects with confidence.

Lower testing costs

Test in deterministic, ephemeral simulations instead of expensive canary environments.

Case studies

The rules of testing? We rewrote them. See how companies are building smarter and reshaping the testing landscape with Antithesis.

See all case studies

40%

Reduction in overall engineering hours spent on testing and triage

Read more

10x

Faster time-to-release with fewer critical failures

Read more

75+

Severe bugs found that all other testing missed

Read more

The only way to thoroughly test and debug complex software

Book a demo

Sample log explorer preview

The latest from our blog

cover image

A declarative restoration

Why testing fell behind the rest of software development, and how it can catch up.

cover image

A fighting retreat

We're all turning into crabs, but we can choose how fast we do so.