head to head · open source
Uptime Kuma vs databuff
Uptime Kuma has 91,498 GitHub stars, 8,431 forks, 805 open issues and last shipped today. databuff has 683 stars, 136 forks, 11 open issues and last shipped 2 days ago. Uptime Kuma leads on adoption by 13,296% (91,498 vs 683 stars). Uptime Kuma is written in JavaScript under MIT; databuff is written in Java under AGPL-3.0. Uptime Kuma has attracted 9% as many forks as stars, databuff 20%. Uptime Kuma was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (monitoring), so they are genuine substitutes rather than adjacent tools.
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 | databuff | |
|---|---|---|
| GitHub stars | ★ 91K | ★ 683 |
| License | MIT | AGPL-3.0 |
| Written in | JavaScript | Java |
| Last push | 2026-09-18 | 2026-09-16 |
| Forks | ⑂ 8.4K | ⑂ 136 |
| 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 databuff if
- You want the databuff feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Java
- You evaluated both and databuff 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 databuff
DataBuff — AI Native APM Built On Opentelemetry Mission: build the strongest OpenTelemetry APM backend AI native · OTLP native · multi agent out of the box · self hosted traces, metrics, topology Live Demo · Documentation · Open Source APM · 简体中文 · Community AI multi agent troubleshooting · Service health · Call graph topology Keywords : AI Native APM · OpenTelemetry APM · OTLP Backend · Multi Agent · Distributed Tracing · AIOps · Open Source APM · MCP · Self Hosted Observability What is DataBuff DataBuff is an AI native APM backend built on Opentelemetry — ingest traces, metrics, and logs via OTLP, with full sta…
read the full databuff overview →
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Frequently asked questions
Is Uptime Kuma or databuff more popular?
Uptime Kuma has 91,498 GitHub stars and databuff has 683. Uptime Kuma has the larger community by that measure.
Are Uptime Kuma and databuff free?
Both are open source. Uptime Kuma is licensed under MIT and databuff under AGPL-3.0. Neither carries a licence fee.
What is the difference between Uptime Kuma and databuff?
Uptime Kuma is written in JavaScript and databuff 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 databuff?
Choose Uptime Kuma if you want the larger community (91,498 stars) or its MIT licence terms. Choose databuff if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.