Apps similar to OnlineOrNot include Uptime Kuma, which is free and open source. Other options are Better Stack, UptimeRobot, Tianji and Pingdom. There's no shortage of Uptime Monitor Services like OnlineOrNot, with more than 50 alternatives for the web, self-hosting, Linux, Android and iPhone.
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.
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Get notified about downtime before your customers do. Statustes monitors your websites, apps, and servers 24/7, providing real-time alerts and detailed insights. Stay ahead of performance issues and ensure a smooth user experience with customizable status pages.
Get notified by the simplest uptime monitoring service in the world, when your website is down or your certificate becomes invalid. No more, no less.
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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...
TLS Checker is a Free TLS / SSL Expiry Monitoring Service which includes Discovery, Inventory and Management of certificates. For Free.
Netumo is a 24x7 Website Uptime monitor with Domain Tracking, so it can let you know when your site is down and back up and let you know when your domain is about to expire. You can get notified through email, SMS, Slack, Microsoft Teams, or Twitter.
United Kingdom
With downhunter, you can monitor over 1000 services. You can check problem reports from other users in real time. Check if your service is just down for you or for everyone. Track apps, isps and other service online.
Free uptime monitoring for websites, servers and APIs. Supports HTTP, TCP, UDP and ICMP. Instant alerts to Telegram, Discord, Slack.
Belarus
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.
Uptimia monitors websites, APIs, servers, SSL certificates and domains from 171 locations worldwide. You get grouped alerts on the channels your team already uses, a public status page, and reports on availability and response time.
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