LangChain provides open frameworks and an agent engineering platform so companies can build, observe, evaluate, and improve AI agents they control.

Products & media

LangSmith Platform

An agent engineering suite that unifies development, monitoring and governance across frameworks, with SaaS, private-cloud and self-hosted deployment options.

LangSmith Deployment

Managed infrastructure for deploying stateful agents with durable execution, scaling, versioning and human approvals.

LangSmith Sandboxes

Isolated execution environments where AI agents can safely run generated code and development tools.

LangSmith Observability

Agent tracing and monitoring tools that expose model calls, tool use, costs and failures for debugging production systems.

LangSmith Evaluation

An evaluation service for testing agents against datasets and human feedback before and after deployment.

LangSmith Fleet

A no-code agent builder that lets teams describe tasks and connect agents to workplace tools.

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Data current as of October 20, 2025

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