UptimeRobot

UptimeRobot is a cloud-based uptime monitoring service that checks your websites, servers, and APIs every few minutes. It supports multiple check types: HTTP(S) requests, ping, port availability, and keyword verification. When something goes wrong, you get notified through email, SMS, voice calls, or integrations with Slack, Telegram, PagerDuty, and others. The free plan covers 50 monitors at 5-minute intervals, which is enough for many small projects or personal sites. Paid plans unlock more monitors, shorter check intervals (as low as 30 seconds), and advanced features like SSL certificate monitoring, public status pages, and maintenance windows. UptimeRobot also exposes a public API so you can pull monitoring data into your own dashboards or automation workflows. The service is operated by the company UptimeRobot Ltd and has been around since 2010. It is a straightforward, no-nonsense tool for sysadmins, developers, and small businesses who need reliable uptime tracking without overcomplicating things.