Langfuse
LLM Observability
Open-source LLM engineering platform that captures traces, runs evaluations, and helps teams analyze cost, latency, and quality across production AI apps.
LISTED PRICING
Free tier + Cloud plans from $29/monthDIRECTORY / NARROW THE CANDIDATES
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LLM Observability
LangSmith helps developers trace, evaluate, test, and monitor applications built with language models and agent workflows.
LISTED PRICING
Free Developer tier; Plus $39/user/month; Enterprise custom