head to head · open source
Uptime Kuma vs aya
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped today. aya has 4,811 stars, 477 forks, 201 open issues and last shipped today. Uptime Kuma leads on adoption by 1,802% (91,498 vs 4,811 stars). Uptime Kuma is written in JavaScript under MIT; aya is written in Rust under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, aya 10%. aya 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 | aya | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 4.8K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Rust |
| Last push | 2026-09-18 | 2026-09-18 |
| Forks | ⑂ 8.4K | ⑂ 477 |
| 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 aya if
- You want the aya feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and aya 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 aya
Aya is an eBPF library for the Rust programming language, built with a focus on developer experience and operability, and it exists so that Rust developers can load, attach, and drive eBPF programs running inside the Linux kernel without depending on C toolchains or C eBPF frameworks.
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Frequently asked questions
Is Uptime Kuma or aya more popular?
Uptime Kuma has 91,498 GitHub stars and aya has 4,811. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and aya free?
Both are open source. Uptime Kuma is licensed under MIT and aya under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and aya?
Uptime Kuma is written in JavaScript and aya in Rust. 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 aya?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose aya if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.