Uptime Kuma

Uptime Kuma is a fully self-hosted, open-source monitoring tool with no cloud-hosted version offered by the project. The most common deployment method is via Docker, using the official image 'louislam/uptime-kuma' with a single docker run command or docker-compose file. The project is maintained by developer Louis Lam and hosted on GitHub.

Uptime Kuma supports a wide variety of monitor types including HTTP(s), TCP port checks, ICMP ping, DNS record queries, Docker container health, MQTT, gRPC, and database connectivity checks for MySQL, PostgreSQL, MongoDB, and Redis. It can also monitor Steam game server status and perform keyword-based content checks on HTTP responses. Each monitor type supports custom intervals, retry logic, and individual notification configurations.

Yes, Uptime Kuma supports over 90 notification integrations including Discord, Slack, Telegram, Microsoft Teams, PagerDuty, email via SMTP, Pushover, ntfy, generic webhooks, and many others. Each monitor can be configured with its own notification rules, escalation timers, and quiet hours. The notification system is built natively into the application with no additional plugins required.

Uptime Kuma is free and self-hosted, allowing unlimited monitors with custom intervals as fast as 20 seconds, but requires you to provision and maintain a server. Uptime Robot is a managed cloud service with a free tier limited to 50 monitors at 5-minute intervals, making it faster to set up with zero infrastructure. For users who want full data privacy, unlimited monitors, and sub-minute polling without subscription costs, Uptime Kuma is the stronger choice.