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LangChain

LangChain develops open-source frameworks and commercial tools for building AI agents. Its projects include LangChain, LangGraph, Deep Agents and LangMem, while LangSmith supports agent development and operation. The company focuses on giving developers tools to build, evaluate, deploy and monitor AI applications.

Linked from langchain.com; others from Wikidata · checked 29 Oct

Visit langchain.com
Status
Active
Checked 29 Oct 2026
Based in
San Francisco, United States
Source ↗
Founded
2023
Source ↗
Tools listed
5

Tools from LangChain

  • LangSmith

    Trace, monitor and evaluate AI agents in production

    Coding · Sign up · Checked

    Free tier; Plus from $39/seat/monthTrace usage billed pay-as-you-go beyond included volume
  • LangMem SDK

    Python library that gives agents long-term memory and prompt-based learning

    Coding · Install · Checked

    Free MIT-licensed libraryModel and embedding-provider usage costs are separate.
  • LangGraph

    Open-source Python library for orchestrating stateful, long-running AI agents

    Coding · Open source · Checked

    Free, MIT-licensed open sourceModel and hosting costs are separate
  • LangChain

    Open source framework for building agents that work with many models and tools

    Coding · Open source · Checked

    Free open source libraryLangSmith is paid separately
  • Deep Agents

    Open-source agent harness for long-running, multi-step tasks

    Coding · Open source · Checked

    Open-source SDK; usage costs separateModel, infrastructure and optional managed-service charges are separate.

From @LangChain

Recent important posts · features

Open on X
  • New feature

    Managed Deep Agents 0.9 adds scheduling and per-run configuration

    “TL;DR on Managed Deep Agents 0.9: ✅ Agent-created schedules: agents can set up reminders and recurring tasks from a conversation. ✅ Per-run configuration: one deployment can pick its model, skills, and tools for each run. ✅ Slack reactions: agents acknowledge messages before”

    @LangChain · Oct 26View

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