Cost / License
- Freemium
- Proprietary
Platforms
- Online
Port Monitor has been discontinued. Similar sites and apps include Uptime Kuma, which is free and open source. Other options are UptimeRobot, Nagios, Pingdom and StatusCake. Website Monitoring Tools like Port Monitor are a crowded field, with more than 100 alternatives for Linux, Windows, Android, iPhone and Mac.
Check for website status, integrate automatically with Zapier.

The most frustrating part for the website owner is the failure of the internet connection with their site. If you find that you cannot access your website. Do not be panic. Most website owners feel that there is some kind of problem in the backend/server's end.
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.


Trafikito is free Linux servers monitoring solution which by default checks RAM, disk space, CPU and sends you an email if something is wrong.




Netweak is a delightful, minimalist monitoring platform that gives you insights on performance and availability for your linux servers & websites.




Website Monitoring - Monitor your website uptime and HTTP/FTP/SMTP/POP3 services. Real-time Phone and SMS alerts. Free website monitors available.


Simple website availability and uptime monitoring tool. No installation, checks for backend and frontend errors.


Semonto is an uptime monitoring app that allows you to keep an eye on your websites, servers and apps 24/7. Get notified when something goes wrong so that you can fix it before anyone notices.




Monika is a command-line application to monitor every part of your web app using a simple YAML configuration file. Get alert notifications through SMTP, Discord, Slack, WhatsApp, and many more when your site is down but also when it's slow!.


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.

SIMPLE Website monitoring. If your website goes down, shouldnt YOU be the first to know about it?