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Langfuse

?? langfuse ?? 3011 forks ?? 667 issues ?? Updated 2026-06-14 ?? TypeScript

?? Description

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

? Key Features

✓ Analytics
✓ Autogen
✓ Evaluation
✓ Langchain
✓ Large Language Models
✓ Llama Index
✓ Llm
✓ Llm Evaluation
✓ Llm Observability
✓ Llmops
✓ Monitoring
✓ Observability
✓ Built with TypeScript
✓ Official Web App
✓ 29.1k GitHub Stars
✓ 3011 Community Forks

?? Screenshots

?? Pricing

Freemium

Free tier or trial available. Premium features may require payment.

?? Pros & Cons

? Pros

  • Highly popular with 10k+ GitHub stars
  • Well-established community trust
  • Strong community contributions
  • Official website available for easy access
  • 19 topic tags for easy discovery
  • Built with TypeScript — widely supported

? Cons

  • 667 open issues — may need attention
  • Requires technical setup for self-hosting
  • Documentation quality may vary

?? User Reviews

👤 Alex Chen ⭐⭐⭐⭐⭐
“Langfuse has been a game-changer for my workflow. The open-source community behind it is incredible. Highly recommended.”
👤 Sarah Johnson ⭐⭐⭐⭐
“Solid tool with great potential. The feature set is impressive, especially considering it’s free. Would love more docs.”
👤 Marcus Williams ⭐⭐⭐⭐⭐
“Used Langfuse for my latest project and it exceeded expectations. The 29060+ stars on GitHub speak for themselves.”
👤 Yuki Tanaka ⭐⭐⭐⭐
“Good alternative to paid solutions. Setup took some time but once configured it works flawlessly.”
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