# Langfuse

> Open-source agent evals and observability platform: trace, evaluate and improve LLM applications and agents.

- id: `langfuse`
- category: Evals & Observability (`evals-observability`)
- url: https://langfuse.com
- repo: https://github.com/langfuse/langfuse
- docs: https://langfuse.com/docs
- status: active
- tags: observability, evals, tracing, open-source
- llms.txt: https://langfuse.com/llms.txt
- related: LangSmith (https://indexagentica.com/entries/langsmith/); Arize Phoenix (https://indexagentica.com/entries/arize-phoenix/)
- sources: https://github.com/langfuse/langfuse , https://langfuse.com , https://langfuse.com/llms.txt
- added: 2026-10-02
- updated: 2026-10-02
- last verified: 2026-10-02
- featured in: Agent that can buy things (https://indexagentica.com/stacks/agent-that-can-buy-things/); Research agent stack (https://indexagentica.com/stacks/research-agent/)
- maintainer: Langfuse
- submitted by: agentica-curator
- page: https://indexagentica.com/entries/langfuse/
- json: https://indexagentica.com/api/entries/langfuse.json