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@antithesishq

Antithesis

Antithesis: Ship boldly, break nothing

What is Antithesis?

Antithesis de-risks the development of critical systems. Our platform runs your complete system, analyzes its behavior, and exposes bugs as quickly as they are introduced. We arm your team with a root cause and a deterministic reproduction of every issue found.

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

Read more about what problems Antithesis solves and how we have helped companies like yours!

Ready to get started?

Reach out to us via the "contact us" form

Or join our public Discord server.

What's here?

Antithesis for Agents

The easiest way to get started with Antithesis is to use our Agent skills. The skills will help you plan which properties to test, harness your software, deploy to Antithesis, and even triage reports!

Dev Workflow

Antithesis users get the most value when their organization's CI is working smoothly with Antithesis. You can use our GitHub Action to trigger an Antithesis test suite based on your development workflow. View the source to see how it works.

SDKs

Take full control of your testing destiny! Integrating Antithesis into your code via the SDK will give you the greatest control over which properties Antithesis tests. SDKs are available for:

Open Source Software (OSS)

Antithesis maintains the following general-purpose OSS projects for the benefit of the community.

Hegel

Hegel is a universal property-based testing protocol and family of libraries, built on top of Hypothesis. Visit Hegel's website to learn more.

Bombadil

Property-based testing for web UIs, autonomously exploring and validating correctness properties, and finding harder bugs earlier. Visit the repo to learn more.

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  1. antithesis-trigger-action antithesis-trigger-action Public

    A GitHub Action to trigger an Antithesis test suite.

    TypeScript 19 6

  2. bombadil bombadil Public

    Property-based testing for web and terminal UIs

    Rust 1.5k 67

  3. valthree valthree Public

    A clustered, Valkey-compatible database backed by object storage

    Go 41 3

  4. madness madness Public

    Madness enables you to easily run the same binary on NixOS and non-NixOS systems

    Nix 318 5

Repositories

Showing 10 of 60 repositories
  • antithesis-skills Public

    AI Skills for Antithesis Users

    antithesishq/antithesis-skills's past year of commit activity
    JavaScript 285 Apache-2.0 18 12 2 Updated Oct 15, 2026
  • snouty Public

    A CLI for the Antithesis platform

    antithesishq/snouty's past year of commit activity
    Rust 30 Apache-2.0 3 6 3 Updated Oct 15, 2026
  • anta Public

    Anta is Antithesis design system

    antithesishq/anta's past year of commit activity
    TypeScript 17 MIT 2 0 2 Updated Oct 15, 2026
  • bombadil Public

    Property-based testing for web and terminal UIs

    antithesishq/bombadil's past year of commit activity
    Rust 1,542 MIT 67 14 11 Updated Oct 14, 2026
  • postgres-workload Public

    {✱} Testing Postgres on Antithesis

    antithesishq/postgres-workload's past year of commit activity
    Python 2 0 0 0 Updated Oct 13, 2026
  • hashicorp-raft-poc Public

    Proof of Concept for testing Hashicorp Raft with Antithesis

    antithesishq/hashicorp-raft-poc's past year of commit activity
    Go 2 MPL-2.0 0 0 2 Updated Oct 11, 2026
  • hands-on-tutorial-1 Public

    Antithesis Hands-on Tutorial 1 - Bug Hunt

    antithesishq/hands-on-tutorial-1's past year of commit activity
    Python 9 14 2 0 Updated Oct 10, 2026
  • demo-data-streaming Public

    Data streaming demo

    antithesishq/demo-data-streaming's past year of commit activity
    Rust 0 0 13 3 Updated Oct 7, 2026
  • percona-xtradb-cluster Public Forked from percona/percona-xtradb-cluster

    A High Scalability Solution for MySQL Clustering and High Availability

    antithesishq/percona-xtradb-cluster's past year of commit activity
    C++ 1 160 0 0 Updated Oct 7, 2026
  • snouty-badge Public

    Animated snouty badge for SYCL badge hardware

    antithesishq/snouty-badge's past year of commit activity
    Zig 2 0 0 1 Updated Oct 6, 2026