Uptime Kuma, UptimeRobot, Pingdom, NIXStats, StatusCake, Uptime.com, Is it Down?, Is Down For Everyone (or Just Me), Downping, Upzilla, Host-Tracker, StatusBeacon.io, Down For Everyone Or Just Me?, Servitor.io, ServersUp.net, PageStat.us, Pingspace, Page An Engineer, Downtime Monkey, PowerOutage, AlertFox Website Monitoring, downinspector.com, Monitive, DownNotifier.com, WatchMouse, UPDOWNTODAY, IsItDown.no, Shoppimon, Global Server Monitoring, Shopping Cart Diagnostics, WebSitePulse, Snapmon, ping-di-pong, Monitor The Internet, Uptime Doctor, Monitor2, EZ Website Monitoring, Montastic, NodeMeter, BrowserMob Monitoring, Panopta, MonitorHub, Webmon.com, SynTraffic, AgentSlug.com, Jiuston, 247webmonitoring, Freesitestatus, Uptime Web, Kanla are some alternatives to Downdetector.