ErrorFeed

Error tracking and exception handling for developers, startups, and freelancers.
TrackJS

JavaScript Error Tracking for Modern Web Applications.
Instabug

The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.
RootCause

Record, Replay and Reproduce JavaScript Errors.
Errbit

The open source error catcher that’s Airbrake API compliant.
Errorception

Painless JavaScript Error Tracking.
Sentry.io

From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications – from the frontend to the backend.
Raygun

Raygun gives developers meaningful insights into problems affecting their applications. Discover issues – Understand the problem – Fix things faster.
AirBrake

Airbrake is the leading exception reporting service, currently providing error tracking.
HoneyBadger

Exception, uptime, and performance monitoring for Ruby.