UptimeRobot - Free Website Uptime Monitoring
Robusta - SRE Copilot for Kubernetes
StatusPage.io - StatusPage.io is the best way for web infrastructure, developer API, and SaaS companies to get set up with their very own status page in minutes. Integrate public metrics and allow your customers to subscribe to be updated automatically.
Komodor - The Kubernetes native troubleshooting platform
FreshStatus - Better status pages in 1-click, FREE FOREVER
Crisp Status Page - Monitor servers and let users know if something goes down.