Arize Phoenix
Arize Phoenix is an open-source AI observability and evaluation platform developed by Arize AI for tracing, evaluating, and debugging large language model (LLM) and agent applications.
Model Evaluation
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Helicone
Helicone is an open-source LLM observability platform and AI gateway founded in 2023 by Justin Torre, Cole Gottdank, Barak Oshri, and Scott Nguyen.
LangSmith
LangSmith is a commercial observability, evaluation, and deployment platform for large language model (LLM) applications and AI agents, developed and operated by LangChain Inc. It provides developers and…
Langfuse
Langfuse is an open-source LLM engineering platform that provides observability, tracing, prompt management, evaluation, and dataset tooling for applications built on large language models.
Patronus AI
Patronus AI is an automated LLM evaluation, observability, and guardrails platform founded in 2023 and headquartered in San Francisco.