Website uptime monitoring. Be notified by email when your site is down. Free and open source, monitor as many URLs as you want. You can hack it and host it yourself or use the official instance.
Platforms
- Online




Netthrob is described as 'Runs automated verification checks on your website every three minutes from five different geographies and immediately informs you through Phone, SMS & Email when your site goes down' and is a Uptime Monitor service in the network & admin category. There are more than 100 alternatives to Netthrob for a variety of platforms, including Web-based, SaaS, Windows, Linux and Android apps. The best Netthrob alternative is Uptime Kuma, which is both free and Open Source. Other great apps like Netthrob are UptimeRobot, Tianji, Pingdom and Vantaj Uptime.
Website uptime monitoring. Be notified by email when your site is down. Free and open source, monitor as many URLs as you want. You can hack it and host it yourself or use the official instance.




NodePing Server Monitoring and Web Site Monitoring. Simple but powerful Internet service monitoring. Checks as frequent as once a minute.



PushMon is a new kind of cloud-based monitoring system. Instead of checking public facing servers on a regular basis, PushMon will wait for pings from the objects being monitored. These objects are usually batch jobs, scheduled/cron scripts, backups, or test scripts, but really...




🔥 Free & open source under MIT! Über fast, backwards compatible (IE8+), tiny, and simple status page built with Hugo. Compatible with Netlify & GitHub Pages. https://github.com/mistermantas/cstate.

Website monitoring service that offers a comprehensive free plan with:
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Uptime Monitor monitors your resources using HTTP/HTTPS (highly customizable), TCP, or Ping protocols. It supports multiple notification channels such as SMS, email, Slack, and Discord. In addition, Uptime Monitor can host status pages on your own domain for free.


Website & Web Application Monitoring
Dotcom-Monitor instantly alerts you when your website has problems. Detailed diagnostics enable you to take quick corrective action and see troubling trends, bottlenecks and intermittent issues clearly. We monitor externally, from the end.




A simple self-hosted status page site with an API written in Django under the BSD license.
RapidSpike is a Digital Experience Monitoring Platform that interacts with your online platforms exactly as your customers do. It collects data across your digital ecosystem to help you improve a fast, reliable digital customer experience.




Pingbreak is an original and free monitoring service. Get notified through Twitter if your website is down. Pingbreak checks all of your websites each minute and alert you instantly by Direct Message (DM)



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 there is downtime or issue. Be proactive and keep your customers happy!.



