# LangChain

MIT-licensed framework of model, tool and retrieval integrations for agents. LangChain is free, with no paid plan attached, at langchain.com.

## Facts

- **Pricing tier:** Free
- **Works on:** API, Self-hosted
- **Works in browser:** No

## Capabilities

- MIT-licensed framework of model, tool and retrieval integrations for agents
- Python and JavaScript versions
- Pairs with LangGraph and LangSmith (separate free tier)

## FAQ

### What is LangChain?

LangChain is listed under Agent Frameworks (Developers), in the AI Agents & Automation category on Flocci AI Tools. MIT-licensed framework of model, tool and retrieval integrations for agents. It is free, with no paid plan attached, and it lives at langchain.com.

### Is LangChain free?

LangChain is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 397 entries on Flocci AI Tools with no upgrade path built in.

### Can I use LangChain in a browser, or is there an app?

LangChain needs to be installed or self-hosted — it doesn't run in a browser tab. It is available on an API and self-hosting.

### What can LangChain do?

LangChain does 3 things the catalog singles out: Mit-licensed framework of model, tool and retrieval integrations for agents; python and javascript versions; pairs with langgraph and langsmith (separate free tier).

### What is the best free alternative to LangChain?

Agno is the closest free alternative: it sits in the same Agent Frameworks (Developers) sub-category and is free. AWS Strands Agents, CAMEL and Claude Agent SDK also start free. The full list is on the alternatives page.

## Related

- [LangChain alternatives](https://aitools.flocci.in/alternatives/langchain)
- [Agent Frameworks (Developers)](https://aitools.flocci.in/category/ai-agents-automation/agent-frameworks-developers)
- [Best free AI agent frameworks for developers](https://aitools.flocci.in/best/best-agent-frameworks-developers)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/langchain

Facts last verified: October 2026