AI Gateway Directory

Opik

Open-source LLM tracing and evals from Comet

Opik logs traces of LLM calls and RAG pipelines, runs automated evaluations and shows dashboards for production monitoring. Comet publishes the code and also runs a hosted version.

opikcomettracingevals

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Arize Phoenix

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AI observability and evaluation you can self-host

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Braintrust

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Evals, logging and prompt tooling for AI products

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Datadog LLM Observability

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LLM traces inside Datadog

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Helicone

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Open-source LLM observability through a proxy or SDK

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Langfuse

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Open-source LLM observability, evals and prompt management

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LangSmith

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Tracing, evals and deployment from the LangChain team

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