Directory / Langfuse
Langfuse
Verified
Self-hostable open-source LLM and agent observability.
Langfuse is an open-source platform for tracing, prompt management, and evaluation of LLM and agent applications. It supports self-hosting and Langfuse Cloud.
- Model support
- Multi-model
- Deployment
- Cloud, Self-hosted
- Open source
- Yes
- License
- MIT (see repo for any enterprise modules)
- Pricing model
- Mixed
- Added / updated
- 19 Aug 2026 / 19 Aug 2026
langfuse.com · Docs · Source
Assessment
Langfuse provides observability for self-hosted factories. Traces gain operational value when connected to pull requests, evaluations, and delivery outcomes; the trace store alone lacks those controls. The core is MIT-licensed, with cloud optional.
Strengths
- Self-hostable traces, prompts, and evals.
- Model-agnostic.
- MIT core with documented self-hosting and cloud paths.
Limitations
- Merge and revert measurement requires instrumentation outside the trace store.
- Cloud vs OSS features.
- Not an execution harness.
Compare
- vs langsmith : Open-source observability compared with a LangChain-based control plane.