Jan runs an offline AI chat assistant on a personal computer as an open-source ChatGPT alternative.
Open source
24 alternativesLeon
Use Leon as an open-source personal assistant project built for users to run and customize.
About Leon
Leon is an open-source personal AI assistant project from GitHub. It is built around tools, context, memory, and agentic execution. Leon can choose how to handle a goal, use tools instead of only replying with text, remember useful information, and run in smart, controlled, or agent mode depending on the task. It is distributed as a repository that users install and run themselves, with Node.js 24.0.0 or later and pnpm. Leon can operate locally and can work with local models. It also supports remote AI providers, so how data is handled depends on which provider is configured.
The project is in a transition. As of the homepage notice dated 2026-03-29, the 2.0 Developer Preview on the develop branch is the current focus. The documentation for the new version is not ready, and the docs site and older guides mostly describe the legacy architecture. The master branch holds the older, more stable pre-agentic version.
Key features
- Smart, controlled, and agent modes for different kinds of tasks
- Native skills for controlled actions and SKILL.md-backed agent skills
- Computer use of desktop and browser interfaces with visual outcome checks
- Layered memory for preferences, day-to-day context, and recent discussion
- Support for both local and remote AI providers
- Answers grounded in context about the user's machine and setup
Best for: Developers and technical users who want to run, inspect, and customize an open-source personal assistant on their own systems.
Good for
- Source code is public, so the architecture can be inspected and modified
- Can run locally and work with local models
- Supports both local and remote AI providers
Watch out for
- Documentation for the 2.0 version is not ready yet
- The develop branch is a developer preview, and the older docs mostly reflect the legacy architecture
- Requires Node.js 24.0.0 or later
Leon at a glance
- Website
- github.com/leon-ai/leon
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Leon FAQ
Which operating systems are supported?
The repository lists Linux, macOS, and Windows as supported operating systems.
Which version is more stable?
The homepage describes the master branch as the legacy, more stable pre-agentic version. The develop branch holds the 2.0 Developer Preview.
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