More about the 5 Best Frontend Error Monitoring Tools.
Rollbar is positioned as an Enterprise APM service with a wide range of tools and high price tag. TrackJS is focused on frontend error monitoring with more emphasis of filtering frontend noise and identifying impactful errors. TrackJS is considerably cheaper than Rollbar.
With TrackJS, the focus is on errors occurring on the browser. Filtering is second to none, and the quick views of trending errors are helpful in digging past the 3rd party script noise. It filters down to the core issues.