Seems like a pretty neat service. To save others some time, they don't have a free tier, you can't host it yourself, and they use Docker for builds before deployments:
Docker's fairly easy to get your head around in a few hours if you do a bit of reading. It's being used as a base tool for more and more projects now, so I'd definitely recommend having an understanding of how it works at a basic level, at least.
http://support.deploybot.com/article/1028-plans-and-pricing