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




The top-rated alternative to UptimeRobot is Uptime Kuma, which is free and open source. People also recommend Better Stack, Tianji, Pingdom and Kener. Website Monitoring Tools like UptimeRobot are a crowded field, with more than 100 alternatives for the web, self-hosting, Windows, Linux and Mac.
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.






Track web page changes in any web page daily for free users, every 30 minutes for paid users - no RSS or Atom required. Receive notifications via email, Instant Message, and SMS.
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)



Latency test is a tool that helps you periodically test the latency of your website or API and monitor uptime. It let's you know if your website is down or slow using off the shelf integrations, such as E-mail, Slack, OpsGenie, PagerDuty, etc.




Noah is your 24/7 website monitoring Telegram bot. When your site goes down, it sends instant alerts directly to your phone. With Noah, you can stay ahead of issues, act fast, and keep your users' experience reliable—all from a simple chat.



KIT.DOMAINS is a convenient and reliable tool designed to make domain monitoring accessible and effective for everyone.



Milepost is a GitHub app that watches your services and labels your pull requests, notifying you and your team when your deployments land.


ApiChecker is reliable uptime and performance monitoring for your service. It uses different servers around the world to verify your service/API/WebSite performance and uptime ?! We also provide different way to keep you notified about downtime - it can be SMS , Slack, Email...




Free open-source website monitoring software, easy to set up and use for monitoring web sites. You can monitor single web pages, multiple web pages, pages in sitemap and even your whole web site using spider. You can check HTTP result codes and even contents of the checked pages.

Downtime Cat monitors your website, and if it goes offline, sends you an email so you can fix it fast.


The website monitoring service that doesn't suck. Get an email when your website goes down. Statuses are available by email, web, RSS feeds and widgets.