head to head · open source
LibreChat vs Leon
LibreChat has 46,647 GitHub stars, 9,596 forks, 732 open issues and last shipped yesterday. Leon has 17,629 stars, 1,479 forks, 112 open issues and last shipped yesterday. LibreChat leads on adoption by 165% (46,647 vs 17,629 stars). LibreChat is written in TypeScript under MIT; Leon is written in TypeScript under MIT. LibreChat has attracted 21% as many forks as stars, Leon 8%. LibreChat was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| LibreChat | Leon | |
|---|---|---|
| GitHub stars | ★ 47K | ★ 18K |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 9.6K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick LibreChat if
- You weight community size — 47K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick Leon if
- You want the Leon feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and Leon fits your workflow better
About LibreChat
LibreChat English · 中文 🚀 What's New in v0.8.8 rc2 Agent run control: Interrupt an Agent before visible answer text, steer runs with files and quoted excerpts, durably queue follow ups, and recover saved partial work with Keep going or Answer now . Agent activity: Optional generated labels group reasoning and tool work, fold completed groups into live phase cards, keep generated files visible, summarize multi step phases, and show the current reasoning direction. Human in the loop Agents: Stream up to four related questions, pause for input or tool approval, and resume durably. Unified Agent Builder: Configure…
read the full LibreChat overview →
About Leon
Leon Your open source personal AI assistant. I share Leon progress most regularly on X / @grenlouis Follow progress on X / @grenlouis · Website · Newsletter · Roadmap · Story ⚠️ Important Notice (as of 2026 03 29) [!IMPORTANT] Leon is currently focused on the 2.0 Developer Preview on the develop branch. The new documentation is not ready yet . The current docs site and older guides mostly reflect the legacy architecture. If you want the legacy, more stable pre agentic version of Leon, use the master branch. If you want to explore or contribute to Leon's new core, develop is the right place. The most accurate…
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Frequently asked questions
Is LibreChat or Leon more popular?
LibreChat has 46,647 GitHub stars and Leon has 17,629. LibreChat has the larger community by that measure.
Are LibreChat and Leon free?
Both are open source. LibreChat is licensed under MIT and Leon under MIT. Neither carries a licence fee.
What is the difference between LibreChat and Leon?
LibreChat is written in TypeScript and Leon in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, LibreChat or Leon?
Choose LibreChat if you want the larger community (46,647 stars) or its MIT licence terms. Choose Leon if its feature set, stack or MIT licence fits better. Both are self-hostable.