Uptime Kuma

Uptime Kuma is a self-hosted uptime monitoring tool built for teams and individuals who want full control over their monitoring data without relying on a third-party SaaS. It's a popular UptimeRobot alternative you can run on your own infrastructure.

The interface is clean and reactive, showing live status for all your monitors without needing a page refresh. You can track HTTP(S) endpoints, TCP ports, DNS records, Docker containers, databases, and more. Each monitor gets its own response time graph and uptime history.

Key capabilities include:

• 90+ notification integrations covering Slack, Telegram, Discord, PagerDuty, email, webhooks, and many others
• Status pages you can publish publicly or keep private, with custom domains and branding
• Multiple monitor types including keyword matching, JSON query checks, gRPC, and certificate expiry monitoring
• Maintenance windows to pause alerts during planned downtime
• Two-factor authentication and multi-user support for team access
• Ping and heartbeat monitors for cron jobs and background tasks

Compared to tools like Checkmate or OpenStatus, Uptime Kuma is deliberately lightweight. It runs as a single Docker container with no external database required, storing everything in SQLite. That makes it easy to self-host on a small VPS or home server without much overhead.

It doesn't offer distributed probing from multiple global locations out of the box, which tools like Peekaping do. But for a single-node monitor covering your own services, it covers the essentials well and has a large, active community behind it.