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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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