I have used buildbot for about 5 years on a cross-platform (mac, linux, windows) project. It is definitely lightweight and flexible. Pros: - The schedulers and

I have used buildbot for about 5 years on a cross-platform (mac, linux, windows) project. It is definitely lightweight and flexible. Pros: - The schedulers and pollers is very stable. You don't really have to worry about uptime. - Good enough documentation. Cons: - Configuration is done in python. If you don't know python well then be prepared spend time to learn it. The biggest pain point, at least for me, has been that buildbot has no support for caching of dependencies. If your project has many dependencies you will spend quite a bit of time either installing dependencies on the CI builders or having long build times because every build will download dependencies. This is not really a buildbot issue itself, but it will definitely bug you if you have used hosted CI products like TravisCI or Circle CI.