UptimeRobot Dashboard with 50 Monitors, Checked Every 5 Minutes, Totally Free. Monitor HTTP(S), Ping, Port and check Keywords. Get alerted via e-mail, SMS, Twitter, web-hooks or... Freemium Web Android Public Status Page Uptime Monitoring Support for Let's Encrypt Add a feature 78 Like
Nagios Nagios is a powerful monitoring system licensed under Nagios Enterprises that helps organizations identify and resolve IT infrastructure issues. Free Open Source Linux Hardware Monitoring Network Monitoring On-premises software Add a feature 74 Like
Pingdom Pingdom web site monitoring and other infrastructure for you and instantly let you know when anything goes wrong. Measure uptime, downtime, and the performance of your... Freemium $ $ $ Web Android iPhone Performance Monitoring Transactional Monitoring Uptime Monitoring Add a feature 54 Like
PHP Server Monitor PHP Server Monitor is a script that checks whether your websites and servers are up and running. It comes with a web based user interface where you can manage your... Free Open Source Windows Linux BSD Self-Hosted PHP Uptime Monitoring Add a feature 15 Like
StatusCake StatusCake enables the visitor to track unlimited websites for free and get alerts when the site is down or having trouble. StatusCake also tracks performance over time... Freemium $ $ $ Web Network Monitoring Uptime Monitoring Add a feature 36 Like
Cabot Self-hosted, easily-deployable monitoring and alerts service - like a lightweight PagerDuty. Free Open Source Self-Hosted No features added Add a feature 9 Like
NIXStats SaaS monitoring tool for linux servers and websites. Think up-time robot but with more features. You can monitor your linux hosts, windows hosts under development. Freemium $ $ $ Web Uptime Monitoring Computer monitoring Downtime detection Performance Monitoring ... Uptime Monitoring Add a feature 6 Like
Site24x7 Comprehensive website and web application monitoring: * simulate a real browser (Firefox) to check performance * services monitoring (FTP(S), DNS, PING, TCP, SSL... Freemium $ $ $ Web IT Automation Uptime Monitoring Add a feature 8 Like
Opsview Enterprise Server monitoring software for physical, virtual, and cloud-based IT. They also do email monitoring, application monitoring. The system is used to provide insight into... Commercial Windows Linux Web iPhone Network Monitoring Computer monitoring Uptime Monitoring Add a feature 15 Like
Is It Down Right Now? "Is It Down Right Now" monitors the status of your favorite web sites and checks whether they are down or not. Check a website status easily by using the below... Free Web Uptime Monitoring Add a feature 9 Like
Binary Canary Website monitoring service that offers a comprehensive free plan with: * escalation levels (if a first-responder contact doesn't acknowledge the downtime, another... Commercial $ $ $ Web Uptime Monitoring Add a feature 4 Like
Monitis Monitis is a Cloud monitoring and IT analytics service offering Website Monitoring, Server Monitoring, Network Monitoring, Application Monitoring, Cloud Monitoring, and... Commercial $ $ $ Web Network Monitoring Uptime Monitoring Add a feature 22 Like
AppBeat Monitor Mobile Don't lose your customers because your service is down! Monitor your websites and cloud services from multiple geographic locations and receive instant alert when... Freemium Android Android Tablet Performance Monitoring Uptime Monitoring Add a feature 6 Like
Nodeping NodePing Server Monitoring and Web Site Monitoring. Simple but powerful Internet service monitoring. Checks as frequent as once a minute. Commercial Web No features added Add a feature 3 Like
AppBeat Proactively monitor your websites and online services. Receive immediate notification when a problem is detected so you can quickly resolve the root cause and prevent... Commercial $ $ $ Web Network Monitoring Uptime Monitoring Add a feature 71 Like
