Errbit
The open source error catcher that's Airbrake API compliant
... appear in the UI as different occurences of the same error and notices with differing fingerprints are displayed as separate errors. Following the recommendation of 12factor.net, Errbit takes all of its configuration from environment variables. You can use dotenv, which is included in the Gemfile, to fill in any values that you can't or won't supply through the environment.