A workmate directed me to a Ruby client of Sentry. Even though the server is a Django server, we can still use Rails to report to it.
It's called Raven-Ruby: https://github.com/getsentry/raven-ruby
Question
Is there anything for Rails that is similar to Sentry for Django?
The main functionality I'm after is automatic deduping exceptions so emails aren't repeated for the same error.
Here is a screenshot of Sentry to explain the functionality visually:
Solution
A workmate directed me to a Ruby client of Sentry. Even though the server is a Django server, we can still use Rails to report to it.
It's called Raven-Ruby: https://github.com/getsentry/raven-ruby
OTHER TIPS
Errbit can do it and is free (also self hosted) -- https://github.com/errbit/errbit
There are several commercial offerings including Airbrake, exception.io, and I'm sure some others...
Have you looked into Airbrake.io ?