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LangFuse

Freemium

Open-source LLM engineering platform for tracing, evals, and analytics.

Open SourceAPICloudSelf-hostedEnterpriseTypeScript SDKPython SDK

Tool Info

Categories
Observability · Evaluation
Official Website
langfuse.com
Repository
langfuse/langfuse
Official Docs

Overview

LangFuse provides observability for LLM applications including traces, scores, and prompt versioning.

Self-hostable or available as managed cloud.

Pricing

Free tier available
Free (open source)Cloud (paid)Enterprise

Pros

  • Open source
  • Full tracing pipeline
  • Eval integration

Best For

LLM tracingPrompt managementProduction monitoring

When NOT to Use

  • Self-hosting requires infra
  • Learning curve

Related Tools

Phoenix
Open-source observability for LLMs, embeddings, and retrieval.
MLflow
Open platform for the ML lifecycle — experiments, models, and deployment.

Alternatives

Phoenix
Open-source observability for LLMs, embeddings, and retrieval.

Often Compared With

Phoenix
Open-source observability for LLMs, embeddings, and retrieval.

Compare With

Compare with Phoenix

Tags

#observability#tracing#evals

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