This feature is quite an interesting technical feat, considering that it shouldn't really be possible to get error information form 3rd party scripts. See [this](https://github.com/loggly/loggly-jslogger/issues/22) and [this](https://github.com/logentries/le_js/issues/51) for discussions.
Ranked in these QuestionsQuestion Ranking
Pro Easy to use UI
Airbrake.io boasts a beautiful user interface which gives easy access to features such as intelligent error grouping and application insights, session details and backtraces. All these allow you to squash those bugs at a much faster pace.
Pro Airbrake errors can be self-hosted on Errbit
Errbit is a self-hosted error catcher for Airbrake. It allows keeping errors off Airbrake's servers by using Airbrake's error tracking tools to send error logs to your own ErrBit based web service. Useful for when errors contain sensitive client data.
Pro Asynchronous error tracking script
By including Airbrake's client side error tracking JS into your code, you won't have to worry about it affecting your page load times at all. Since the library loads asynchronously, which means it won't cause painful delays for your site's visitors.
Pro Easy integration with other applications
Airbrake integrates easily with Github, Hipchat, Asana and a number of other services, which can be viewed here. Also if you've got a custom app you'd like to integrate into Airbrake, you can use Airbrake's public API or there web hooks functionality to your advantage.
Pro Generous free plan
Free plan allows for up to 5000 events/month, customizable rate limits, integrations (e.g. with Slack), multiple users, and 30 day retention.
Pro Integrates with Slack
Rollbar can be integrated with Slack to send notifications of various event to a set Slack channel based on customizable rules.
Pro Stack traces (traceback)
Stack trace with function calls and line numbers.
Pro Client library is open source
Pro Custom error grouping
Pro Capture any uncaught errors
Rollbar allows sending any log messages to Rollbar not just exceptions enabling you to go back and check for missed exceptions.
Pro Supports "deploy" events
You can easily send "deploy" events with
curl, so that you know to which version the errors apply. Errors are grouped automatically by name/type, but if the re-occur after a deploy, they'll be shown again above the deploy in the timeline.
Pro Multiple integration options
Asana - Create and resolve Asana tasks
Bitbucket Issues - Create and manage Bitbucket Issues
Campfire - Get alerts in your Campfire room
Flowdock - Get messages in your flow
GitHub Issues - Create and manage GitHub Issues
HipChat - Get alerts in your HipChat room
JIRA - Create, resolve, and reopen JIRA issues
PagerDuty - Trigger and resolve incidents in PagerDuty
Pivotal Tracker - Create and manage Pivotal Tracker stories
Slack - get alerts in a chatroom or group
Sprintly - Create and manage Sprintly items
Trello - Create and manage cards in Trello
VictorOps - Trigger and recover alerts in VictorOps
Webhook - Post JSON payloads to arbitrary URLs
Email - get notifications and daily summaries
Pro Source maps support
Source map support is used to reference original source code in cases where the code is minified.
Pro Error filtering
Rollbar allows ignoring specific exceptions simply by adding the error message to the ignoredMessages array.
Con Non-free / propritary software
Airbrake is non-free software, so it cannot be self-hosted, audited, or improved upon by the community. Your data is insecure - open to be read by Airbrake Inc, and if they shut down you will be unable to continue using the software.
Con No integrations on the free plan
Con No context for some errors
Con Old-school UI
Built with the default Bootstrap theme. Looks like 2011.