Cost / License
- Free
- Proprietary
Application typeApplication types
Alerts
- Discontinued
Platforms
- Online


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!.








Statsignal is the simplest and most cost-effective way to monitor your website or server and publish a status page of your system. No plans, pay as you go. Free monitors available.




Monitor and communicate the status of your site, app or API with your very own status page. Create it in less than 3 minutes with Statuspal! Or host it yourself for free with our open source community edition.

Uptime monitoring and status pages for indie SaaS and production AI agents (OpenClaw, agent APIs) — setup in minutes, not another observability suite.




SIMPLE Website monitoring. If your website goes down, shouldnt YOU be the first to know about it?
Single-binary crond + supervisord replacement with a built-in web dashboard, terminal UI, and REST API. Every run recorded - exit code, duration, stdout/stderr.




EU-first reliability toolkit combining uptime monitoring, heartbeat/cron checks, and public status pages on German infrastructure.




Open Source (GPLv3) Network Monitoring for Windows, Linux & Android. Simple setup, auto-detects running services, runs checks concurrently, open port scanning and alerting. Written in C++ & Qt 5.


Continuous integration build testing and error reporting for developers. 1 simultaneous build for free for both private and public projects on Github.



Panopta provides advanced network & server monitoring for online businesses & service providers. We go beyond basic monitoring to give ops teams the tools they need to detect issues before they occur & minimize the impact of outages/slow load time.




Testomato allows you to create tests in seconds so you can take control of your website's performance. Errors are checked from multiple locations to ensure accuracy. Monitor uptime performance as often as every 15 seconds!




HowFast monitors offers website downtime monitoring with a check every single minute. It also helps you to track the response time of your server over time, telling you how much time was spent during DNS resolution, TCP connection, TLS handshake, HTTP send / wait / download, and...




Performance monitoring simplified. Never let users see your website down or with bad loading speeds. Receive alerts & insights in real-time on health and performance.






Assertible is the easiest way to test and monitor your APIs and helps reduce bugs in web apps by providing tools to continuously validate endpoints and responses with a flexible interface to run your tests any time and place.




Sites Watcher checks web pages that interest you for changes. When changes are found, Sites Watcher will show you current page version with highlighted updates.



The Sensu Open Source Project (a.k.a. "Sensu Core") intends to provide an open framework for building comprehensive monitoring solutions, without imposing restrictions or being overly opinionated.
Monitive is an uptime monitoring service, where users sign up and input their website address, which we check every minute, from a random location around the world, and instantly notify them when their site is down.




Silent Down is a website uptime and performance monitoring platform, to keep an eye on your application and instantly alert you if any issues arrive.





Netthrob 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.
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.
Monitor your websites and APIs from multiple locations around the world and get notified by smart alerts. Get daily, weekly and monthly availability reports along with performance metrics.
