GitLab
GitLab is a code hosting program. https://gitlab.com has the enterprise version, free for all to use. It's basically a self-hostable, full fledged github.
coala is (mostly) free software, so why would we depend on a proprietary code hosting system?
Based of Docker, you can basically create your own - very flexible - ci system.
There's also no need to wait for builds, gitlab spawns new workers as needed
This is easier for newcomers (vs. git rebase ...)
- GitLab seems to have a bit of a slower web interface
- GitHub is more popular and has a bigger user base.
coala