LangSmith

LangChain’s platform for tracing, evaluating and managing prompts.

Freemium Prompt Management & Testing langchain.com

About LangSmith

LangSmith adds tracing, datasets, evaluations and a prompt hub, with tight integration for apps built on LangChain and LangGraph.

The natural choice if your stack already uses LangChain.

FAQ

What is LangSmith?

LangChain’s platform for tracing, evaluating and managing prompts.

Is LangSmith free?

LangSmith has a free tier, with paid plans for more usage or features.

What are some alternatives to LangSmith?

Agenta, Arize Phoenix, Braintrust, DeepEval, Google AI Studio.

Alternatives to LangSmith

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Agenta

Open Source

Open-source platform for prompt management, evaluation and observability.

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Arize Phoenix

Open Source

Open-source tracing, evaluation and prompt playground for LLM apps.

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Braintrust

Freemium

Prompt management combined with evaluation and tracing.

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DeepEval

Open Source

Open-source framework for unit-testing LLM outputs.

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Google AI Studio

Free

Google’s free playground for writing and testing prompts with Gemini.

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Helicone

Open Source

Open-source LLM observability with prompt versioning and cost tracking.

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Langfuse

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Open-source LLM engineering platform with prompt management, tracing and evals.

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Latitude

Open Source

Open-source platform for prompt engineering and AI agents.

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Lunary

Open Source

Open-source monitoring and prompt management for AI apps.

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Maxim AI

Freemium

End-to-end platform for prompt experimentation, evaluation and observability.

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MLflow Prompt Registry

Open Source

Open-source MLOps platform with GenAI tracing, evaluation and a prompt registry.

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Opik

Open Source

Open-source LLM evaluation and observability by Comet.

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