Gatus
Monitoring as a YAML file, for people who already run everything from Git.
Gatus is a developer-first health-check service configured entirely in YAML, which means your monitoring lives in the repository, gets reviewed in pull requests, and is deployed like any other code. It handles HTTP, TCP, ICMP, DNS and TLS-expiry checks, evaluates rich conditions on responses — status code, body content, response time, certificate age — and ships a clean dashboard and status page. Apache-2.0, around 11.7k stars, actively developed. It is the natural pick for a team already doing GitOps, and the wrong one if a non-engineer needs to add a monitor.
What it does well
- +Configuration is YAML in Git — reviewed, versioned and diffable
- +Rich condition evaluation, including response body and TLS expiry
- +Apache-2.0 with no enterprise carve-out
- +Very light: one small binary, minimal memory
Where it falls short
- −No UI for adding monitors — everything is a config change
- −Same blind spot as any self-hosted monitor: it can go down with you
- −Fewer notification integrations than Uptime Kuma
- −Not usable by non-technical team members
Gatus as an alternative to
Where Gatus shows up in our comparisons, and how it ranked.
Gatus head-to-head
Straight comparisons against the tools people weigh it against.