head to head · open source
Uptime Kuma vs OpenObserve
Uptime Kuma has 91,477 GitHub stars, 8,426 forks, 805 open issues and last shipped yesterday. OpenObserve has 21,993 stars, 1,091 forks, 598 open issues and last shipped yesterday. Uptime Kuma leads on adoption by 316% (91,477 vs 21,993 stars). Uptime Kuma is written in JavaScript under MIT; OpenObserve is written in TypeScript under AGPL-3.0. Uptime Kuma has attracted 9% as many forks as stars, OpenObserve 5%. Uptime Kuma was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Uptime Kuma | OpenObserve | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 22K |
| License | MIT | AGPL-3.0 |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 8.4K | ⑂ 1.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Uptime Kuma if
- You weight community size — 91K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick OpenObserve if
- You want the OpenObserve feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and OpenObserve fits your workflow better
About Uptime Kuma
Uptime Kuma is a free, MIT licensed, self hosted monitoring tool with a reactive web dashboard, built for operators and teams that want to watch their own HTTP, TCP, and DNS endpoints and keep the resulting data on their own infrastructure.
read the full Uptime Kuma overview →
About OpenObserve
OpenObserve is an open source observability platform for logs, metrics, traces, analytics, Real User Monitoring, session replay, pipelines, SLO, and LLM observability. It lives in the cloud native infrastructure ecosystem and is described as an alternative to Datadog, Splunk, and Elasticsearch. The project is built in Rust, ships as a single binary, and uses Parquet columnar storage with an S3 native design.
read the full OpenObserve overview →
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Frequently asked questions
Is Uptime Kuma or OpenObserve more popular?
Uptime Kuma has 91,477 GitHub stars and OpenObserve has 21,993. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and OpenObserve free?
Both are open source. Uptime Kuma is licensed under MIT and OpenObserve under AGPL-3.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and OpenObserve?
Uptime Kuma is written in JavaScript and OpenObserve in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Uptime Kuma or OpenObserve?
Choose Uptime Kuma if you want the larger community (91,477 stars) or its MIT licence terms. Choose OpenObserve if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.