Keywords AI
Langfuse
Observability, Prompts & EvalsLayer 4Open SourceWhat is Langfuse?
Langfuse is an open-source LLM observability platform that provides tracing, analytics, prompt management, and evaluation for AI applications. It captures detailed traces of LLM calls, supports custom scoring, and integrates with LangChain, LlamaIndex, Vercel AI SDK, and raw API calls. Langfuse can be self-hosted for data privacy or used as a managed cloud service. Its open-source model and generous free tier make it popular with startups and developers.
Key Features
- ✓Open-source LLM observability
- ✓Detailed trace and span tracking
- ✓Prompt management
- ✓Evaluation scoring
- ✓Self-hosted and cloud options
Common Use Cases
Teams who want open-source LLM observability they can self-host and customize
- •Self-hosted LLM monitoring
- •Open-source tracing for AI applications
- •Prompt versioning and management
- •Cost tracking across providers
- •Community-driven observability
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