Langfuse
An open-source observability platform for LLM applications: tracing, cost and latency tracking, evaluations, datasets, and prompt management. It is self-hostable, so you can keep your traces on your own infrastructure.
Strengths
- Detailed tracing, with token, cost, and latency per call
- Evaluations, datasets, and prompt management in one place
- Self-hostable, and integrates with LiteLLM, LangChain, and more
Weaknesses
- Self-hosting adds infrastructure to run, such as a database
- Some features are reserved for the paid and enterprise tiers
- Observability is one more system to operate and maintain
At a glance
- Licence
- MIT
- Pricing
- Open core
- Platforms
- Docker, Web, Linux
- GPU required
- No
Links
See also
Entry last verified 30 July 2026.