CircleCI

CircleCI is a continuous integration and delivery platform that builds, tests and deploys applications of many kinds, including mobile, web, container and infrastructure-as-code projects, on Linux, macOS and Windows execution environments.

It integrates with GitHub, GitLab and Bitbucket, as well as AWS, GCP and Kubernetes. Features include configurable execution environments, build images, build optimisation and autoscaling. Smarter Testing runs only the tests affected by a change to give faster feedback, and an MCP server and the Chunk agent let AI agents work with CircleCI. A command-line tool is available, for example through Homebrew.

CircleCI is a commercial cloud service that can be tried for free.