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.
Server Monitoring and Down Alerts made easy! WIndows, Linux & macOS Monitor servers easily and receive alerts on CPU, RAM or downtime.
updown.io is a HTTP monitoring solution with a clean UI and a cheap and simple pricing. It notifies you of downtimes by email or SMS and provides a public status page you can share.
France
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StablePing is a fully managed uptime monitoring service for just $3.95/month. Whenever your website goes down, their system will alert you within seconds via email or SMS (and they'll work with you to get it back online).
Website downtime alerts and website monitoring - receive email alerts and SMS alerts worldwide if your website goes down. 60 websites monitored every 3 minutes, completely free. Powerful Pro features.
Monitors your websites every 1 minutes, totally free. Get alerts by e-mail, SMS. Add up to 3 websites for free,. Monitors can be refreshed for an instant check with a click. Supports https.
Web monitoring service, which checks website every 5 minutes. It detects when it's offline, redirected, broken or even hacked. Provides SMS and email notifications, statistics and logs.
Pingmeter developed to work, so you can rest. You might have a great website, shop or blog. so do your competitor. And they get your visitors when your site is down. It is stressful to have your website down and you get aware of it few hours after your visitors.
Pinger Man is a modern platform to monitor Uptime of Websites and Applications. It supports notification via Email, SMS and Web Hooks. Users can also showcase the uptime of their services using Public Status Pages.
Check the website is a service that notify you when down. It's totally free. You can get notify by email, slack, telegram, desktop application and browser extension.
Downdetector monitors over 3,000 services in 25 countries including telecommunication outages (internet, phone and TV service), online banking problems, websites that go down and apps that aren’t working.
United States
Health checking for any application and infrastructure written in any language inc. BASH, Python, PHP, Perl - riotkit-org/infracheck
