That's what errbit is for. You only have to use the Airbrake libraries for reporting the errors, and errbit hosted locally collects/notifies/displays them.

If you already integrated with Airbrake, you just have to reconfigure the host it reports to, to your own errbit server and it'll swap everything over from deploy tracking to error reporting.

Errbit is an active project, https://github.com/errbit/errbit, and error reporting libraries don't tend to need a lot of maintenance.