Monitor the performance of your website and benchmark against the competition. Get alerted in Slack or by email when there's a problem.
Continuously test the speed of your website in a controlled lab environment and get in-depth reports to optimize your site. DebugBear is built on top of Lighthouse, but provides debug data that goes far beyond the basic Lighthouse report.
In addition to the lab data, DebugBear also keeps track of the real-user data collected by Google.
GTmetrix - GTmetrix is a free tool that analyzes your page's speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for your pages and offers actionable recommendations on how to fix them.
UptimeRobot - Free Website Uptime Monitoring
SpeedCurve - Monitor your front-end. Beat the competition
Uptime Kuma - A fancy self-hosted monitoring tool.
Wattspeed - Wattspeed helps you measure and monitor the performance of your website.
OnlineOrNot - Uptime monitoring for software teams (even teams of one).