head to head · open source
AstrBot vs Leon
AstrBot has 45,662 GitHub stars, 3,350 forks, 1,516 open issues and last shipped yesterday. Leon has 17,629 stars, 1,479 forks, 112 open issues and last shipped yesterday. AstrBot leads on adoption by 159% (45,662 vs 17,629 stars). AstrBot is written in Python under AGPL-3.0; Leon is written in TypeScript under MIT. AstrBot has attracted 7% as many forks as stars, Leon 8%. Leon was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, chatbot), 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
| AstrBot | Leon | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 18K |
| License | AGPL-3.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 3.4K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick AstrBot if
- You weight community size — 46K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Python
- 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 AstrBot
简体中文 ｜ 繁體中文 ｜ 日本語 ｜ Français ｜ Español ｜ Русский Documentation ｜ Blog ｜ Roadmap ｜ Issue Tracker ｜ Email Support AstrBot is an open source all in one Agent chatbot platform that integrates with mainstream instant messaging apps. It provides reliable and scalable conversational AI infrastructure for individuals, developers, and teams. Whether you're building a personal AI companion, intelligent customer service, automation assistant, or enterprise knowledge base, AstrBot enables you to quickly build production ready AI applications within your IM platform workflows. Key Features 1. 💯 Free & Open Source. 2. ✨ AI…
read the full AstrBot 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 AstrBot or Leon more popular?
AstrBot has 45,662 GitHub stars and Leon has 17,629. AstrBot has the larger community by that measure.
Are AstrBot and Leon free?
Both are open source. AstrBot is licensed under AGPL-3.0 and Leon under MIT. Neither carries a licence fee.
What is the difference between AstrBot and Leon?
AstrBot is written in Python 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, AstrBot or Leon?
Choose AstrBot if you want the larger community (45,662 stars) or its AGPL-3.0 licence terms. Choose Leon if its feature set, stack or MIT licence fits better. Both are self-hostable.