Source: https://seerepo.com/compare/janhq/jan/vs/leon-ai/leon
Markdown source: https://seerepo.com/compare/janhq/jan/vs/leon-ai/leon.md
Description: jan and leon share 7 technologies: SQLite, Vite, React, @tanstack/react-virtual, ai, ai-sdk, and shiki. jan is written in Rust and leon in TypeScript.

# jan vs leon

jan and leon share 7 technologies: SQLite, Vite, React, @tanstack/react-virtual, ai, ai-sdk, and shiki. jan is written in Rust and leon in TypeScript.

- [janhq/jan](https://seerepo.com/r/janhq/jan): Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.
- [leon-ai/leon](https://seerepo.com/r/leon-ai/leon): 🧠 Leon is your open-source personal assistant.

## What they share and what sets them apart

- In common: SQLite, Vite, React, @tanstack/react-virtual, ai, ai-sdk, shiki
- Only in jan: Tauri, Hummingbird, sqlx-sqlite, tauri-plugin-store, sqlx, Tokio, @tauri-apps/api, gio, glib, objc2-app-kit, objc2-foundation, rusqlite, TanStack, @tauri-apps/plugin-store, PostHog, OpenAI, comfy-table, indicatif, tauri-plugin-dialog, Ratatui, console, gtk, rfd, ed25519-dalek, hmac, keyring, oauth2, rmcp, agent-client-protocol, opencv-python, png, pulldown-cmark, zip, schemars, log, env_logger, psutil, tauri-plugin-log, cairo-rs, objc2-web-kit, webkit2gtk, webview2-com, ash, calamine, csv, html2text, infer, pdf-extract, quick-xml, Tailwind CSS, class-variance-authority, tailwind-merge, sonner, Radix UI, motion, @streamdown/code, dnd-kit, emoji-picker-react, Framer, react-textarea-autosize, use-stick-to-bottom, vaul, Lucide, @tabler/icons-react, streamdown, react-markdown, unist-util-visit, katex, rehype-katex, remark-gfm, remark-math, Zod, tauri-apps
- Only in leon: @tanstack/react-router, Hugging Face, Fastify, @fontsource/jetbrains-mono, @ark-ui/react, @pierre/highlights, cli-spinner, remixicon, jose, transformers, node-llama-cpp, faster-whisper, g2p-en, OpenRouter, beautifulsoup4, yaml, @sinclair/typebox, Ajv, ajv-formats

## Side by side

| | jan | leon |
|---|---|---|
| Size | 478,180 lines written, 949 code files | 225,418 lines written, 800 code files |
| Who writes it | 0.5% of its commits signed by AI. With GitHub Copilot, Claude Code, Cursor, Factory, Jules, and Aider | 0% of its commits signed by AI |
| Activity | Last push November 5, 2026, 7,455 commits, 45,500 stars | Last push November 6, 2026, 3,130 commits, 17,646 stars |
| Tests | 527 test files. 48.9% of its code files have a test that imports them | 182 test files. 26.4% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, jan or leon?

jan, with 478,180 lines written; leon has 225,418.

The proof: [janhq/jan's code at commit 879e6ae](https://github.com/janhq/jan/tree/879e6ae9cca4a38673fdb4093349a327e17ccbb1)

### Which has more GitHub stars, jan or leon?

jan, with 45,500 stars; leon has 17,646.

The proof: [janhq/jan on GitHub](https://github.com/janhq/jan)

### Which has more tests, jan or leon?

jan, with 527 test files; leon has 182.

The proof: [janhq/jan's code at commit 879e6ae](https://github.com/janhq/jan/tree/879e6ae9cca4a38673fdb4093349a327e17ccbb1)

### Which was updated more recently, jan or leon?

leon: its last push was on November 6, 2026, and jan's on November 5, 2026.

The proof: [leon-ai/leon's commits on GitHub](https://github.com/leon-ai/leon/commits)

### Which has more commits signed by AI, jan or leon?

jan: an AI signed 0.5% of its commits, with GitHub Copilot, Claude Code, Cursor, Factory, Jules, and Aider.

The proof: [the commits each tool signed in janhq/jan](https://seerepo.com/r/janhq/jan/ai)

## Sources

- janhq/jan: Read on November 6, 2026, at commit 879e6ae (https://github.com/janhq/jan/tree/879e6ae9cca4a38673fdb4093349a327e17ccbb1)
- leon-ai/leon: Read on November 6, 2026, at commit f5795bd (https://github.com/leon-ai/leon/tree/f5795bd79ef946933603b4b47b27225912278df6)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.