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Langfuse

Open-source LLM engineering platform — traces, evals, prompt management — 23K+ stars

Open Sourcefreemium

About

Langfuse is an open-source LLM engineering platform providing observability, analytics, and prompt management. Features distributed tracing for complex agent chains, evaluation scoring, prompt versioning and A/B testing, dataset management, and cost tracking. Integrates with LangChain, LlamaIndex, OpenAI SDK, and any LLM framework via OpenTelemetry.

Details

Typeobservability, evaluation, prompt-management
Integrationslangchain, llamaindex, openai, anthropic, opentelemetry
Languagetypescript, python

Tags

observabilitytracingevaluationprompt-managementanalyticsopen-source