head to head · open source
Uptime Kuma vs tapir
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped yesterday. tapir has 1,473 stars, 468 forks, 173 open issues and last shipped 2 days ago. Uptime Kuma leads on adoption by 6,112% (91,498 vs 1,473 stars). Uptime Kuma is written in JavaScript under MIT; tapir is written in Scala under Apache-2.0. Uptime Kuma has attracted 9% as many forks as stars, tapir 32%. 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 | tapir | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 1.5K |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Scala |
| Last push | 2026-09-18 | 2026-09-17 |
| Forks | ⑂ 8.4K | ⑂ 468 |
| 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 tapir if
- You want the tapir feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Scala
- You evaluated both and tapir 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 tapir
Tapir is a Scala library that lets developers describe an HTTP API once in a type safe, declarative form and then expose that description as a server, consume it as a client, and generate OpenAPI, AsyncAPI, and JSON Schema documentation from it, and it is aimed at Scala teams building HTTP services that want their API documentation to stay in step with their code.
read the full tapir overview →
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Frequently asked questions
Is Uptime Kuma or tapir more popular?
Uptime Kuma has 91,498 GitHub stars and tapir has 1,473. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and tapir free?
Both are open source. Uptime Kuma is licensed under MIT and tapir under Apache-2.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and tapir?
Uptime Kuma is written in JavaScript and tapir in Scala. 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 tapir?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose tapir if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.