# langchain

> The agent engineering platform.

## Facts
- **Category:** [Agent Frameworks](https://agentsearchengine.app/category/agent-frameworks)
- **Type:** Framework
- **Pricing:** Open source
- **GitHub stars:** 143,267
- **Language:** Python
- **License:** MIT
- **Last repo activity:** 1 day ago (Aug 2, 2026)
- **Official site:** https://docs.langchain.com/langchain/
- **Source code:** https://github.com/langchain-ai/langchain
- **Listing on Agent Search Engine:** https://agentsearchengine.app/agents/langchain
- **Data verified:** July 2026

## Best for
Builders who want composable primitives and the broadest ecosystem of integrations for LLM applications.

## Avoid if
You want a ready-made autonomous agent out of the box — this is a framework, not an agent.

## About langchain
LangChain is a framework for building agents and LLM-powered applications. It helps you chain together interoperable components and third-party integrations to simplify AI application development — all while future-proofing decisions as the underlying technology evolves. If you're looking for more advanced customization or agent orchestration, check out LangGraph, our framework for building controllable agent workflows. While the LangChain framework can be used standalone, it also integrates seamlessly with any LangChain product, giving developers a full suite of tools when building LLM applications.

_From the project's README._

## Install

```
uv add langchain
```

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Source: [Agent Search Engine](https://agentsearchengine.app) — an independent, hand-curated index of AI agents, MCP servers, and frameworks. Rankings are never sold; sponsored placements are labeled and never numbered. Full directory: https://agentsearchengine.app/llms-full.txt