We alert you, before your customers do.
OnlineOrNot monitors your websites, web apps, and APIs, letting you know instantly if anything goes wrong.
Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Software as a Service (SaaS)


Pulsetic is described as 'Get instant website downtime alerts via phone call, SMS, email, or Slack, monitor global uptime in real time, create status pages, and manage incident reports' and is a website monitoring tool in the network & admin category. There are more than 100 alternatives to Pulsetic, not only websites but also apps for a variety of platforms, including SaaS, Self-Hosted, Windows and Linux apps. The best Pulsetic alternative is Uptime Kuma, which is both free and Open Source. Other great sites and apps similar to Pulsetic are Better Stack, UptimeRobot, Tianji and Kener.
We alert you, before your customers do.
OnlineOrNot monitors your websites, web apps, and APIs, letting you know instantly if anything goes wrong.


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.

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



An uptime monitoring and status page platform for websites, APIs, servers, and Discord bots. Monitor HTTP, Ping, Port, SSL, and Discord services with real-time alerts via Discord, Slack, Telegram.

Phare is the all-in-one platform that covers everything you need to run high-quality production websites with uptime monitoring, analytics, security, incident management, and alerting.




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.




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.




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.


Service for monitoring changes on websites, designed for businesses, developers, and users who need to stay informed in real time about any modifications to web pages.

A simple self-hosted status page site with an API written in Django under the BSD license.
UpTimeLine checks that your websites are online and notifies you in case of downtime. Get up to 20 monitors checked every 5 minutes for free. All HTTP methods, custom body and headers, regex check on response body, SSL certificate monitoring and more.

Free SaaS service for Uptime Monitoring for web sites, hosting servers and ports & custom Status Pages.
