head to head · open source
Langfuse vs OpenLIT
Langfuse has 37,006 GitHub stars, 4,154 forks, 926 open issues and last shipped yesterday. OpenLIT has 2,903 stars, 457 forks, 60 open issues and last shipped 2 days ago. Langfuse leads on adoption by 1,175% (37,006 vs 2,903 stars). Langfuse is written in TypeScript under a custom or non-standard licence; OpenLIT is written in TypeScript under Apache-2.0. Langfuse has attracted 11% as many forks as stars, OpenLIT 16%. Langfuse 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 | OpenLIT | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 2.9K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-04 | 2026-11-03 |
| Forks | ⑂ 4.2K | ⑂ 457 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Langfuse if
- You weight community size — 37K 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 OpenLIT if
- You want the OpenLIT feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and OpenLIT fits your workflow better
About Langfuse
Langfuse Cloud · Self Host · Demo Docs · Report Bug · Feature Request · Changelog · Roadmap · Langfuse is an open source LLM engineering platform. It helps teams collaboratively develop, monitor, evaluate, and debug AI applications. Langfuse can be self hosted in minutes and is battle tested . Proudly made with ClickHouse open source database. 🧑💻 We're hiring Langfuse is growing fast (we doubled the team in the last 6 months) since January 2026 we're part of ClickHouse, we're hiring engineering hybrid across the EU. We hire engineers who love open source and great developer experiences. See open roles → ✨…
read the full Langfuse overview →
About OpenLIT
Open source observability & evaluation for AI agents Trace, evaluate, debug, and optimize AI applications and coding agents with OpenTelemetry. ⭐ Star 🚀 Quickstart 📚 Docs Documentation · Quickstart · Examples · Join Slack See what your AI agents are actually doing AI applications are no longer just LLM calls. A production agent can involve: OpenLIT gives you visibility across the entire workflow. Trace every LLM call, tool invocation, prompt, agent step, token, cost, error, and evaluation — using OpenTelemetry. ⚡ Get started in 5 minutes 1. Start OpenLIT Open: 2. Install the SDK Python: TypeScript: 3…
read the full OpenLIT overview →
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Frequently asked questions
Is Langfuse or OpenLIT more popular?
Langfuse has 37,006 GitHub stars and OpenLIT has 2,903. Langfuse has the larger community by that measure.
Are Langfuse and OpenLIT free?
Both are open source. Langfuse has no licence declared in this registry, and OpenLIT is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Langfuse and OpenLIT ?
Langfuse is written in TypeScript and OpenLIT in TypeScript. 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 OpenLIT ?
Choose Langfuse if you want the larger community (37,006 stars) or its Custom / other licence terms. Choose OpenLIT if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.