Langfuse
Open-source LLM observability and evaluation
4.8(162 reviews)freemium
free tieropen sourceapi access
Open-source LLM engineering platform for tracing, monitoring, evaluating, and debugging AI applications in production.
Pros
- Full LLM call tracing
- Evaluation framework
- Self-hostable
Cons
- Developer tool only
- UI has learning curve
Best For
Engineering teams needing production observability and evaluation for their LLM applications
Pricing
Free
Free
- Core features
- Email support
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