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Langfuse

medium

Open-source LLM observability, tracing, prompt management, and evaluation platform.

2 GB RAM Docker Active custom
Source Docs Website

Replaces

Datadog

Pros

  • Purpose-built tracing and evaluation for LLM apps
  • Integrates with common AI SDKs and frameworks
  • Useful for cost, quality, and prompt iteration tracking

Cons

  • Not useful unless you are building or operating AI apps
  • Requires instrumentation work in applications
  • Open-core licensing needs review for enterprise use

Tags

aiobservabilityevalstracingprompts

Pairs well with

Dify

Self-hosted platform for building AI agents, RAG apps, workflows, and LLM-powered products.

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Flowise

Visual builder for AI agents, chains, and LLM workflows.

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