LangChain

LangChain provides the engineering platform and open source frameworks developers use to build, test, and deploy reliable AI agents

LangChain gives development teams an agent engineering platform, centered on LangSmith, for building, testing, deploying, and monitoring AI agents across the full development lifecycle. Alongside that platform, the company maintains open-source frameworks, including LangChain, LangGraph, and DeepAgents, so teams can start with a quick agent build and move up to more customized, long-running agents as needs grow.

LangSmith covers observability into what agents are doing, evaluation to score and improve agent performance, deployment infrastructure to ship and scale agents in production, sandboxes for running agent-generated code safely, and an LLM gateway for controlling which models agents call. It also offers no-code agent building for non-developers, alongside SDKs in Python, TypeScript, Go, and Java for engineering teams that want to trace their preferred framework or integrate LangSmith with an existing agent stack.

As an automation and agent-engineering platform, LangChain says it is used by thousands of organizations, but its site does not publish specific pricing figures. Teams building or improving AI agents can start building with LangSmith or request a demo to see the platform in action.

Category: Automation. Pricing: freemium. Visit website

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