Semaphore

Semaphore is a CI/CD platform, now open source, designed to be operated by coding agents as well as developers. An agent can set up CI for a repository on request and connect it to Semaphore, then run checks in a production-identical sandbox before code is pushed, with the same machine, image, secrets and cache as the CI.

Semaphore focuses on stable, reproducible test runs that reduce re-runs, with diagnostics and analytics to find the root cause of failed builds and keep pipelines fast as the codebase grows. Enterprise features include SAML single sign-on, role-based access control, audit logs, managed secrets and SOC 2 Type II certification.

Semaphore uses pay-as-you-go pricing without per-seat fees, with a monthly free usage allowance for every organisation; its source code is published on GitHub.