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.
Dell Technologies APEX - Dell Technologies APEX is a platform that delivers excellent cloud experiences to major businesses in the world.
UptimeRobot - Free Website Uptime Monitoring
Cruz RMM - Cruz RMM is an ideal solution for Managed IT service providers on the lookout for a remote management product to mechanize and track the operations of their user base.
SiteUptime - Siteuptime provides website monitoring services. Receive instant email and SMS alerts when your website becomes unavailable. View detailed uptime statistics and performance reports for your website monitors.
LogicMonitor - LogicMonitor is the SaaS performance monitoring platform for the world's best IT teams. Deploy Fast, Monitor More, Improve Ops.