CircleCI

CircleCI is a continuous integration and continuous delivery (CI/CD) platform that automates the build, test, and deployment of software. Founded in San Francisco in 2011, it runs tens of millions of workflows for engineering teams who want faster, more reliable pipelines without maintaining their own build infrastructure. It does not host code or track tickets - it focuses on being a fast, dependable runner of builds and, increasingly, on validating AI-generated code at scale.