INFRASTRUCTURE • CURATED • UPDATED FEB 5, 2026

LangSmith

The Bloomberg Terminal for AI agent observability
Price
Enterprise
API
Yes
Weights
No

LangSmith provides full-stack observability for LLM applications. It allows you to trace every step of an agent's reasoning, debug hallucinations, and monitor costs in real-time.

LangSmith is like a 'Security Camera' for your AI. Sometimes AI gets confused or makes mistakes, and LangSmith lets you watch exactly what it was thinking so you can fix it. It's the best way to make sure your AI stays helpful and doesn't waste money.

Pricing Enterprise
Platforms web
API Yes
Open Source No
Modalities Infrastructure
Best For Best for Observability
Date Added 2026-02-05
Website↗
Enterprise

Enterprise pricing — contact LangSmith for a custom quote and contract terms.

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Q

Is LangSmith free?

A

LangSmith is offered as an enterprise solution; contact the provider for pricing.

Q

Does LangSmith have an API?

A

Yes, LangSmith offers an API for programmatic integration.

Q

What is LangSmith best for?

A

LangSmith is best for Observability. LangSmith provides full-stack observability for LLM applications. LangSmith is like a 'Security Camera' for your AI. Sometimes AI gets confused or makes mistakes, and LangSmith lets you watch exactly what it was thinking so you can fix it. It's the best way to make sure your AI stays helpful and doesn't waste money.

Q

What platforms does LangSmith support?

A

LangSmith supports web.

Q

Is LangSmith open source?

A

No, LangSmith is not open source.

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