Langfuse
ActiveDescription
Open-source LLM observability: tracing, evals, prompt management.
Key Features
- Call tracing — Full LLM call chain recording
- Evaluation — Built-in eval sets and human annotation
- Prompt management — Versioned prompt store
- Multi-framework — LangChain/LlamaIndex/OpenAI
- Self-hosted — Fully private deployment
Use Cases
💡 Add production observability to LLM apps.
💡 Version and AB-test prompts.
💡 Build internal LLM quality evaluation platform.
Categories
Quick Start
npm install @langfuse/tracing
from langfuse import Langfuse
lf = Langfuse(public_key=..., secret_key=...)
trace = lf.trace(name='chat')