When comparing Airbrake vs CatchJS, the Slant community recommends Airbrake for most people. In the question“What are the best JavaScript client-side error logging services?” Airbrake is ranked 7th while CatchJS is ranked 14th. The most important reason people chose Airbrake is:
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.
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Pros
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 Notifications when things break
Can send emails when new errors happen.
Pro Shows code snippets
Shows code snippets of the error and applies source maps automatically.
Pro Doesn't slow down page loads
Has a very small filesize, so it doesn't slow down page loads.
Pro Screenshots really help debugging
It takes a screenshot of the screen, so you can see what the user was looking at when the error happened.
Cons

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
