Jenkins
Open Source
Jenkins is a self-contained Java-based program, ready to run out-of-the-box, with packages for Windows, Mac OS X and other Unix-like operating systems.
Buildbot
Open Source
Buildbot is a software development continuous integration tool which automates the compile/test cycle required to validate changes to the project code base.
Buildkite
Commercial
Buildkite is a CI and build automation tool that combines the power of your own build infrastructure with the convenience of a managed, centralized web UI.
Compare JetBrains TeamCity with alternatives
Compare Jenkins and JetBrains TeamCity and decide which is most suitable for you.
Compare Buildkite and JetBrains TeamCity and decide which is most suitable for you.
Compare Buildbot and JetBrains TeamCity and decide which is most suitable for you.