UptimeRobot is the classic uptime monitoring service: set it up in minutes and it will watch your websites, APIs, ports, and cron jobs around the clock, alerting you the moment anything goes down.
One of the pioneers of hosted uptime monitoring, UptimeRobot checks your services from multiple global locations and confirms outages before notifying you through email, SMS, voice calls, Slack, PagerDuty, webhooks, and many other integrations. Beyond basic HTTP checks it covers keyword, port, ping, API, DNS, SSL-expiry, and domain-expiry monitoring, plus heartbeat monitoring for recurring jobs. Public status pages — with custom domains and white-labeling on paid plans — keep your users informed during incidents, and monthly uptime reports document your reliability. A free tier with 50 monitors makes it the default first monitor for countless indie projects.
The Free plan ($0) includes 50 monitors at 5-minute intervals and basic status pages. Solo costs $12/month billed annually for 10 monitors at 60-second intervals, Team costs $39/month billed annually with 100 monitors, 30-second checks, and white-label status pages, and Scale costs $79/month billed annually with 15-second checks; Enterprise is custom. Paid plans come with a 14-day money-back guarantee.
UptimeRobot has earned its reputation over more than a decade of quietly watching the web: setup takes under a minute — paste a URL, pick an alert channel, and monitoring starts. Response-time graphs and historical uptime data make it easy to spot degrading services before they fail outright, and the generous free tier means there is little reason to leave any public-facing service unwatched.
UptimeRobot is for freelancers, small businesses, and growing teams that want dependable, dead-simple downtime alerts and status pages without standing up a full observability stack.