What it does
Leon is a personal AI assistant. It can understand a goal, decide how to handle it, use real tools to get the work done, and remember useful information about you and your setup.
It has modes for following fixed, predictable steps or planning step by step like an agent, and it can operate desktop and browser apps. It works with local AI models for privacy or with remote AI providers.
Its makers say a new version is in developer preview and its documentation is not ready yet; an older, more stable version remains available.
Who it's for
Tinkerers and developers who want a hackable personal assistant.
Can I use it without coding?
With some setup. Installed with a few terminal commands; it needs Node.js. New to this? Start here.
Can I run it?
- Cost
- FreeNothing to pay or sign up for.
- Runs on
- Mac, Windows, Linux
- Privacy
- Your choice: run it on your device or use an online service
- API key
- Not needed
Try it
- Install Node.js version 24 or newer.
- Download Leon's code, install its parts and start it.
- Open Leon in your web browser on your own computer.
Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?
Before you install
- Only download from the official GitHub page. Copies with similar names exist for many popular projects.
- License (MIT): Very permissive: free to use, change and share, including for business.
- More on staying safe
Where people are talking about it
- Leon: Open-source, self-hosted personal assistantHacker News · Sept 2022
- Leon: An open-source personal assistantHacker News · Feb 2019