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.

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

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

PreFlight - Preflight is an Automated Web Testing tool. Allows everyone to automate Web UI tests.

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.

Shake Crash Reports - Personalized crash reporting for mobile apps