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LangChain & LangGraph (overview)

✓ Verified

LangChain for LLM apps; LangGraph for stateful graph agents

Updated Feb 26, 2026
AI Framework/LibraryOpen SourcePythonJavaScript/TypeScript
Last reviewed: Feb 26, 2026Details verified against vendor changelogs and hands-on usage where possible.

About

LangChain & LangGraph is an open-source AI framework ecosystem by LangChain, Inc. for building LLM-powered applications and stateful multi-step agents. Prefer the dedicated LangChain and LangGraph entries for current feature and pricing details.

Key Features

  • ✓Provider-agnostic LLM tooling
  • ✓Tool calling and structured outputs
  • ✓LangGraph graph-based execution for agents
  • ✓Durable state, checkpoints, and persistence
  • ✓Human-in-the-loop patterns
  • ✓Streaming and middleware hooks

Pros & Cons

Pros

  • Open-source with no license cost
  • Open-source and self-hostable
  • Broad integrations (7+ connectors)

Cons

  • No BYOK; model choice dictated by vendor
  • Vendor-specific limitations may apply

Use Cases

    Technical Details

    Languages

    PythonJavaScript

    Integrations

    OpenAIAnthropicGoogleMistralOllamaVector DBsObservability/Tracing

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    Frequently Asked Questions

    What is LangChain & LangGraph (overview)?

    LangChain & LangGraph is an open-source AI framework ecosystem by LangChain, Inc. for building LLM-powered applications and stateful multi-step agents. Prefer the dedicated LangChain and LangGraph entries for current feature and pricing details.

    Is LangChain & LangGraph (overview) free?

    Yes, LangChain & LangGraph (overview) is open source and free to use.

    What programming languages does LangChain & LangGraph (overview) support?

    LangChain & LangGraph (overview) supports 2+ programming languages including Python, JavaScript.

    What platforms does LangChain & LangGraph (overview) support?

    LangChain & LangGraph (overview) is available on Python, JavaScript/TypeScript.

    What can LangChain & LangGraph (overview) do?

    LangChain & LangGraph (overview) provides agentic/autonomous mode. Key features include: Provider-agnostic LLM tooling, Tool calling and structured outputs, LangGraph graph-based execution for agents.

    Visit LangChain & LangGraph (overview) →

    Pricing and features change frequently—confirm on the vendor site.

    We may earn a commission if you sign up. See our disclosure.

    Pricing

    Company

    Name
    LangChain
    Founded
    2022
    Location
    San Francisco, CA

    Links

    GitHub →Twitter →Discord →

    LangChain & LangGraph (overview)

    Open Source

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