UptimeRobot - Website Uptime Monitoring Service
UptimeRobot is a long-established, stable, and full-featured website status monitoring service. Once you set it up, UptimeRobot periodically checks whether your site is online. This matters a great deal to site owners. Imagine you update your server and the site breaks, and you only notice three hours later. All the visitors during those three hours are lost! The free plan of UptimeRobot lets you monitor up to 50 targets, checking each one every five minutes. It supports four check types: HTTP Status, Keyword, Ping, and Port. When something goes wrong, UptimeRobot can notify you by SMS, email, Slack, WebHook, and many other channels. What matters even more to me is that UptimeRobot is well run and stable. I have been using it since 2011. ...