head to head · open source
Uptime Kuma vs openmessaging-java
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped today. openmessaging-java has 723 stars, 219 forks, 13 open issues and last shipped 8 months ago. Uptime Kuma leads on adoption by 12,555% (91,498 vs 723 stars). Uptime Kuma is written in JavaScript under MIT; openmessaging-java is written in Java under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, openmessaging-java 30%. 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 | openmessaging-java | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 723 |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Java |
| Last push | 2026-09-18 | 2026-01-26 |
| Forks | ⑂ 8.4K | ⑂ 219 |
| 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 openmessaging-java if
- You want the openmessaging-java feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and openmessaging-java 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 openmessaging-java
A vendor neutral open standard for distributed messaging and streaming OpenMessaging, which includes the establishment of industry guidelines and messaging, streaming specifications to provide a common framework for finance, e commerce, IoT and big data area. The design principles are the cloud oriented, simplicity, flexibility, and language independent in distributed heterogeneous environments. Conformance to these specifications will make it possible to develop a heterogeneous messaging applications across all major platforms and operating systems. Doc API Doc.
read the full openmessaging-java overview →
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Frequently asked questions
Is Uptime Kuma or openmessaging-java more popular?
Uptime Kuma has 91,498 GitHub stars and openmessaging-java has 723. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and openmessaging-java free?
Both are open source. Uptime Kuma is licensed under MIT and openmessaging-java under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and openmessaging-java?
Uptime Kuma is written in JavaScript and openmessaging-java in Java. 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 openmessaging-java?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose openmessaging-java if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.