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.

Rollbar - Rollbar collects errors that happen in your application, notifies you, and analyzes them so you can debug and fix them. Ruby, Python, PHP, Node.js, JavaScript, and Flash libraries available.

Embrace.io - Embrace analyzes the details of every user session empowering mobile teams to detect, replay, and prioritize what matters most.

AppSignal - We monitor the software that makes your customers happy.

Faultry - Catch launch-breaking SEO, security, and AI visibility issues before users or search engines do.

itbroke.dev - Error monitoring that shows conversion impact. See which bugs are hurting conversions—not just error counts.