Tools / product

Langfuse

MIT-core LLM traces and evals you can self-host. Skip ee/. Not LangSmith's hosted seat.

URL: https://langfuse.com
GitHub: https://github.com/langfuse/langfuse
Collection: AI & Agents
Language: TypeScript
License: MIT (core; skip ee/)
Stars: 36,145
Open source: Yes

llm observability self-hosted open-source

Used in stacks

Langfuse / Helicone

Ranked on

Best open-source LLM observability

Compared with