Port Monitor
Freemium
Port Monitor is an easy tool that does website and server monitoring 24/7 every 60 seconds for free.
Pingdom
Commercial
Pingdom helps you give your customers the best possible web experience by offering a Powerful Web Performance Monitoring Solution.
StatusCake
Freemium
StatusCake delivers accurate global website monitoring for tens of thousands of customers.
Monitis
Freemium
Monitis is a web performance monitoring platform.
PHP Server Monitor
Open Source
PHP Server Monitor is an open source tool to monitor your servers and websites.
Uptrends
Commercial
Uptrends helps you monitor your website uptime, so you will get an alert whenever your websites goes down.
AppBeat
Freemium
AppBeat is reliable website monitoring service that alerts you when there is a downtime or failure. It also measures performance and provides functional tests…
NetCrunch
Commercial
NetCrunch is a Windows Server–based network monitoring tool that boasts high performance and impressive scalability even in a single-server deployment.
HappyApps
Freemium
HappyApps is an online app uptime monitoring platform.
WebSite-Watcher
Commercial
WebSite-Watcher detects website updates and highlights all changes in the text.
Pingoscope
Freemium
Pingoscope is a website monitoring site.
Compare UptimeRobot with alternatives
Compare Port Monitor and UptimeRobot and decide which is most suitable for you.
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Compare Uptrends and UptimeRobot and decide which is most suitable for you.