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Build chains with LCEL

Get your LLM application from prototype to production

Get your LLM application from prototype to production

Build context-aware, reasoning applications with LangChain’s flexible abstractions and AI-first toolkit.

Build context-aware, reasoning applications with LangChain’s flexible abstractions and AI-first toolkit.

global corporations, STARTUPS, and TINKERERS build with LangChain

global corporations, STARTUPS, and TINKERERS build with LangChain

global corporations, STARTUPS, and TINKERERS build with LangChain

A complete set of powerful building blocks

A complete set of powerful building blocks

Get started fast with our comprehensive library of open-source components and pre-built chains for any use-case.

Website example

Smart connections to any source of data or knowledge

Gradient
Gradient
Gradient

Easily-swappable components

Set yourself up for our many-model world. Experiment quickly. Compare and optimize efficiently. Make vendor optionality part of your LLM infrastructure.

A developer platform optimized for production-readiness

A developer platform optimized for production-readiness

When it's time to get to production, you don't want to be flying blind. LangSmith shines a light into the black box of model performance with prompt-level visibility coupled with tools to debug, test, evaluate, monitor your applications with your team.

Website example

One framework.
Infinite use-cases.

  • Chatbots

    Q&A Over Docs

    Summarization

    Copilots

    Workflow Automation

    Document Analysis

    Custom Search

Harness the power–and wrangle the complexity– of LLMs

Get from proof-of-concept to production on one platform

Rely on a set of tools built especially for non-deterministic models

Adopt new cognitive architectures and battle-tested orchestration

Thanks to our contributors and partners for making LangChain awesome

When you build with LangChain, you build alongside a community of developers advancing the frontier of what’s possible with LLMs.