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UptimeRobot - Free Website Uptime Monitoring
Support Hero - Educate your customers through self-help support
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.
Apervita - Apervita is a self-service platform that allows health enterprises and professionals to author evidence-based insight and connect it to practice, anywhere.
FreshStatus - Better status pages in 1-click, FREE FOREVER