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.
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.
Website monitoring service that offers a comprehensive free plan with:
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AlertFox can monitor even complicated steps, (e.g., the complete check out process, not just store uptime)! Only AlertFox can monitor the function and performance of sites that rely on any of the major rich internet applications (RIA), including ActiveX, AJAX, Flash, Flex...
Reliable uptime monitoring, status pages and rapid alerting service designed with the needs of online businesses in mind.
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)
Founded in February 2002, WatchMouse is a global industry leader in self-service website and application performance monitoring.
Unlimited monitors checked from multiple location every minute. Monitor any port or setup a "heartbeat" that works well for cron jobs or any service behind a firewall. Be alerted as soon as your service is offline via email or app integration.
Pingoscope will carefully monitor your website and alert you instantly if it goes down. Unlimited email SMS, Skype, Phone Call notifications, historical response time data, one minute check intervals data and more features available for free as well as no limit accounts for...
Monitor your website from worldwide locations 24x7 and be the first to know when your website is down. Receive instant alerts via SMS, email & twitter. Detailed uptime, performance & response reports available.
UpTower is an easy-use tool for website monitoring. UpTower checks websites in 1-minute intervals and notifies user via push notifications about every outage immediately. Using UpTower app user can monitor websites and their availability for free.
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Easy-to-use and accurate real-time monitoring of your websites and APIs to keep you up to date with performance. In the event of an outage, we notify you immediately via email, Slack, Webhooks, SMS, Telegram, or Discord.
ServersUp.net can check a number of different services on different hosts to make sure those services are up and running. It will send alerts when the statuses change.
