head to head · open source
Langfuse vs Olares
Langfuse has 34,826 GitHub stars, 3,815 forks, 926 open issues and last shipped yesterday. Olares has 5,278 stars, 329 forks, 155 open issues and last shipped yesterday. Langfuse leads on adoption by 560% (34,826 vs 5,278 stars). Langfuse is written in TypeScript under a custom or non-standard licence; Olares is written in Go under AGPL-3.0. Langfuse has attracted 11% as many forks as stars, Olares 6%. Olares 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
| Langfuse | Olares | |
|---|---|---|
| GitHub stars | ★ 35K | ★ 5.3K |
| License | Custom / other | AGPL-3.0 |
| Written in | TypeScript | Go |
| Last push | 2026-09-19 | 2026-09-19 |
| Forks | ⑂ 3.8K | ⑂ 329 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Langfuse if
- You weight community size — 35K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Olares if
- You want the Olares feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Go
- You evaluated both and Olares fits your workflow better
About Langfuse
Langfuse is an open source LLM engineering platform for building, monitoring, and improving AI powered applications. It lives in the LLMops ecosystem and provides tooling for the full development lifecycle—from prompt iteration and evaluation to observability and dataset management. Built with TypeScript and powered by ClickHouse, it enables teams to track LLM calls, user sessions, and internal logic like retrieval or agent actions in a unified interface.
read the full Langfuse overview →
About Olares
Olares is an open source personal cloud operating system built to run AI agents and large language models on hardware you own. It is written in Go and released under the AGPL 3.0 license, and it sits in the cloud native and self hosted corner of the machine learning infrastructure ecosystem. The project describes itself as an operating system you operate in plain language, powered by Kubernetes, turning a machine or a set of machines into a self hosted AI platform reachable from any browser.
read the full Olares overview →
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Frequently asked questions
Is Langfuse or Olares more popular?
Langfuse has 34,826 GitHub stars and Olares has 5,278. Langfuse has the larger community by that measure.
Are Langfuse and Olares free?
Both are open source. Langfuse has no licence declared in this registry, and Olares is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Langfuse and Olares?
Langfuse is written in TypeScript and Olares in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Langfuse or Olares?
Choose Langfuse if you want the larger community (34,826 stars) or its Custom / other licence terms. Choose Olares if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.