head to head · open source
Uptime Kuma vs resilience4j
Uptime Kuma has 93,190 GitHub stars, 8,655 forks, 805 open issues and last shipped yesterday. resilience4j has 10,800 stars, 1,536 forks, 306 open issues and last shipped 4 days ago. Uptime Kuma leads on adoption by 763% (93,190 vs 10,800 stars). Uptime Kuma is written in JavaScript under MIT; resilience4j is written in Java under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, resilience4j 14%. 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 | resilience4j | |
|---|---|---|
| GitHub stars | ★ 93K | ★ 11K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Java |
| Last push | 2026-11-02 | 2026-10-30 |
| Forks | ⑂ 8.7K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Uptime Kuma if
- You weight community size — 93K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick resilience4j if
- You want the resilience4j 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 resilience4j fits your workflow better
About Uptime Kuma
Uptime Kuma Uptime Kuma is an easy to use self hosted monitoring tool. 🥔 Live Demo Try it! Demo Server (Location: Frankfurt Germany): It is a temporary live demo, all data will be deleted after 10 minutes. Sponsored by Uptime Kuma Sponsors. ⭐ Features Monitoring uptime for HTTP(s) / TCP / HTTP(s) Keyword / HTTP(s) Json Query / Websocket / Ping / DNS Record / Push / Steam Game Server / Docker Containers Fancy, Reactive, Fast UI/UX Notifications via Telegram, Discord, Gotify, Slack, Pushover, Email (SMTP), and 90+ notification services, click here for the full list 20 second intervals Multi Languages Multiple…
read the full Uptime Kuma overview →
About resilience4j
= Fault tolerance library designed for functional programming :author: Robert Winkler and Bohdan Storozhuk :icons: :toc: macro :numbered: 1 ifdef::env github[] :tip caption: :bulb: :note caption: :information source: :important caption: :heavy exclamation mark: :caution caption: :fire: :warning caption: :warning: endif::[] image: Status"] image: image: image: License 2", link=" image: link=" image: link=" image: link=" image: link=" image: link=" image: link=" image: toc::[] == Introduction Resilience4j is a lightweight fault tolerance library designed for functional programming. Resilience4j provides higher…
read the full resilience4j overview →
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Frequently asked questions
Is Uptime Kuma or resilience4j more popular?
Uptime Kuma has 93,190 GitHub stars and resilience4j has 10,800. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and resilience4j free?
Both are open source. Uptime Kuma is licensed under MIT and resilience4j under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and resilience4j?
Uptime Kuma is written in JavaScript and resilience4j 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 resilience4j?
Choose Uptime Kuma if you want the larger community (93,190 stars) or its MIT licence terms. Choose resilience4j if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.