Treo - Treo is the page speed monitoring tool that helps your customers from obtaining a faster web experience.
Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.
perf - Perf is a simple app monitoring solution paired with meaningful alerts.
Bird Eats Bug - Saw a bug? Send an instant replay to engineers. It will come with console logs and everything. Developers will ❤️ you.
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
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.