Alternatives · Observability
Umami alternatives (2026)
Umami: MIT analytics. Free forever self-host; Cloud Hobby if you want $0 managed for a single site.
Its Catch: Not PostHog/GA depth — no session replay/heatmaps on Hobby/self-host the way Cloud Business sells them.
Below: 8 free or free-tier tools from the same category (observability tools), free and open source first, then the closest match by shared tags. Each keeps its own Catch.
Free / OSS · OSS/MIT · 92.6k GitHub stars
VerdictMIT self-host uptime. Free forever; you own the box on 3001.
CatchSelf-host uptime + status pages — not Datadog/APM. You run the container, backups, and alerting path. HTTP/TCP checks are the lane, not full distributed tracing.
Free / OSS · Freemium · 9.2k GitHub stars
VerdictAGPL status/uptime as code. Free Hobby is tiny; self-host or pay when monitors multiply.
CatchAGPL-3.0 — network copyleft on modifications you ship as a service. free cloud: one monitor / one page / 10m checks — fine for a side project, not a fleet. Vs Better Stack / Checkly-class SaaS, OpenStatus wins on OSS+IaC; you trade managed depth for license+self-host ops.
Free / OSS · Apache-2.0 · 12.3k GitHub stars
VerdictThe uptime checker for teams that want status checks in git — pick it over Uptime Kuma if YAML beats clicking.
CatchConfig is YAML-only, with no UI for adding checks, which is great for GitOps and less great for non-engineers. It checks from wherever you run it, so you need a second location if you want to catch outages of that host itself. Suites are still marked alpha. A managed Gatus.io exists if you would rather not host it.
Free / OSS · OSS/MIT · 5.2k GitHub stars
VerdictA pretty, free public status page — the page, not your whole monitoring stack.
CatchIts own README says it is not trying to replace Datadog or Atlassian Statuspage; checks run from your server only, so pair it with an external monitor. Smaller community than Uptime Kuma or Gatus, and the 4.x line moved fast.
Free / OSS · AGPL-3.0 · 11.7k GitHub stars
VerdictThe open continuous profiler to run next to Grafana — cheap to operate since 2.0.
CatchAGPL-3.0, like the rest of Grafana's backends, so modified hosted versions must share source. Profiling has overhead and storage cost, so sample sensibly. You get the most out of it inside the Grafana stack; standalone it is less convenient.
Free / OSS · OSS/MIT · 10k GitHub stars
VerdictThe best open UI if your telemetry already lives in ClickHouse.
CatchYou need ClickHouse, either self-run (ClickStack bundles it with the OTel collector) or ClickHouse Cloud, and ClickHouse is its own ops skill. Since joining ClickHouse, the direction follows ClickStack. Releases are split between app, CLI and other packages, which makes version tracking fiddly.
Free / OSS · Apache-2.0 · 8k GitHub stars
VerdictThe fastest way from zero to a useful service map on Kubernetes.
CatcheBPF agents need privileged access and a recent Linux kernel on every node. Some features, such as AI root-cause analysis and SSO, are in Coroot Enterprise. It is opinionated about how it stores data (Prometheus plus ClickHouse), so it is another stack to run.
Free / OSS · Apache-2.0 · 7.5k GitHub stars
VerdictThe vendor-neutral way to get LLM calls into your existing tracing.
CatchTraces can include prompts and completions, which may hold personal data, so configure content capture deliberately. The Traceloop SDK defaults point toward Traceloop's hosted platform; set your own exporter. It is instrumentation, not a UI, so you still need a backend.
FAQ
- What are the best free alternatives to Umami?
- Uptime Kuma, OpenStatus, Gatus, Kener, Grafana Pyroscope. All are reviewed on Stack Gems in the same category (observability tools); 8 free or open source.
- What is the catch with Umami?
- Not PostHog/GA depth — no session replay/heatmaps on Hobby/self-host the way Cloud Business sells them.
- Is there an open-source alternative to Umami?
- Yes: Uptime Kuma (OSS/MIT), OpenStatus (Freemium), Gatus (Apache-2.0), Kener (OSS/MIT).