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Langfuse
LLM ObservabilityOpen-source LLM engineering platform for tracing, evals, and prompt management.
19kstars2.4kforksTypeScript
About
Langfuse is the open-source leader in LLM observability with 19k+ GitHub stars. It covers tracing with multi-turn conversation support, prompt versioning, LLM-as-judge evaluation, and cost tracking. Self-hostable in minutes via Docker, or available as a managed service.
Key Features
- Tracing
- Prompt management
- LLM-as-judge
- Cost tracking
- OpenTelemetry
- Self-hostable
Tags
ObservabilityTracingEvalsLLMOpenTelemetry