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Uptime Kuma
MITSelf-hosted Uptime Kuma replaces UptimeRobot and Pingdom with 20-second probe intervals, multi-protocol checks, and customizable public status pages.
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Overview
An infrastructure team managing dozens of internal microservices and edge APIs often finds commercial monitoring platforms either cost-prohibitive per check or unable to reach private subnets. Uptime Kuma runs as a self-contained service inside the target network, executing sub-minute health probes against HTTP endpoints, TCP ports, Docker sockets, and DNS records. It combines lightweight polling loops with an immediate reactive dashboard and multi-channel alerting.
Why Uptime Kuma instead of Uptime Robot
The primary operational distinction centers on probe frequency and dispatch velocity. Uptime Robot limits free accounts to five-minute intervals and requires paid tier upgrades for sixty-second checks, leaving blind spots where transient degradation escapes detection. Uptime Kuma defaults to twenty-second polling cycles with no check caps, surfacing latency spikes and endpoint failures almost immediately. Because checks run on your own compute, high-frequency polling introduces negligible network overhead without hosted platform rate limits.
Network topology drives the secondary performance difference. Uptime Robot probes from public datacenters across the internet, so requests traverse transit providers, CDN caches, and edge firewalls. Uptime Kuma deploys adjacent to workloads inside a private VPC, behind a VPN, or mounted directly to a Docker socket. While Uptime Robot provides built-in multi-region consensus that filters out regional route flaps, Uptime Kuma trades distributed vantage points for zero probe transit latency and visibility into internal microservices that cannot face the public web.
What it does well
- Multi-protocol monitoring across HTTP(s), TCP ports, DNS records, Ping, WebSocket connections, and local Docker daemon container statuses.
- Fast probe intervals down to twenty seconds, capturing transient connection failures that slower polling schedules overlook.
- Flexible incident dispatch with native connectors for over ninety notification services, including Slack, Telegram, Discord, Gotify, and generic webhooks.
- Passive push monitoring that receives inbound HTTP heartbeats from backup scripts, cron jobs, and background workers to verify task completion.
- Configurable public and private status pages with custom domains, incident notes, and automatic SSL certificate expiry tracking.
- Native Prometheus endpoint that exports monitor states and response latencies directly into existing Grafana telemetry pipelines.
