RunLocalAI
orchestrator
Open source
free
4/5

LangChain

Python/JS framework for chains, agents, and RAG. Batteries-included but heavyweight; many graduate to LangGraph or DIY.

By Fredoline Eruo·Last verified May 6, 2026·100,000 GitHub stars

Overview

Python/JS framework for chains, agents, and RAG. Batteries-included but heavyweight; many graduate to LangGraph or DIY.

Pros

  • Huge ecosystem
  • Many integrations

Cons

  • API churn
  • Abstractions can be leaky

Compatibility

Operating systems
any
GPU backends
any (proxies to a runner)
LicenseOpen source · free

Get LangChain

Official site
https://langchain.com
GitHub
https://github.com/langchain-ai/langchain

Frequently asked

Is LangChain free?

Yes — LangChain is free to download and use and open-source under a permissive license.

What operating systems does LangChain support?

LangChain supports any.

Which GPUs work with LangChain?

LangChain supports any (proxies to a runner). CPU-only inference is also possible but slow.

Reviewed by RunLocalAI Editorial. See our editorial policy for how we evaluate tools.