Overview
Langfuse — Open-source LLM observability platform
Langfuse is an open-source LLM engineering platform for tracing, monitoring, evaluation, and prompt management of LLM applications. It provides detailed traces of LLM calls, cost tracking, user feedback collection, and evaluation tools for production AI applications.
LLM call tracing
Cost and latency tracking
Prompt management
Evaluation datasets
Features & capabilities
Everything it does, in plain English.
The honest take
Where it shines, where it stumbles.
✓ Pros
- ✓Open source and self-hostable
- ✓Comprehensive tracing
- ✓Good evaluation tools
- ✓Active development
- ✓Great free tier
! Watch-outs
- !Setup required for full features
- !Some advanced features on paid tier
- !Documentation still evolving
Who it's for
Where Langfuse pays for itself fast.
LLM application monitoring
Prompt optimization
Production AI debugging
Cost optimization
LLM evaluation
Community reviews
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