head to head · open source
nanobot vs Leon
nanobot has 48,302 GitHub stars, 8,534 forks, 775 open issues and last shipped yesterday. Leon has 17,519 stars, 1,469 forks, 112 open issues and last shipped yesterday. nanobot leads on adoption by 176% (48,302 vs 17,519 stars). nanobot is written in Python under MIT; Leon is written in TypeScript under MIT. nanobot has attracted 18% as many forks as stars, Leon 8%. nanobot was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai-agent, 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
| nanobot | Leon | |
|---|---|---|
| GitHub stars | ★ 48K | ★ 18K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 8.5K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick nanobot if
- You weight community size — 48K stars and counting
- You want the MIT 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 nanobot
nanobot is an ultra lightweight, open source, self hosted personal AI agent framework written in Python, aimed at individual developers and small teams who want to run their own agent through a browser WebUI, a terminal, or chat apps instead of renting a hosted assistant.
read the full nanobot overview →
About Leon
Leon is open source personal AI assistant. It lives in Node.js and TypeScript ecosystem, under AI Interaction & Interfaces category. Project builds around tools, context, memory, and agentic execution. It aims to stay practical, privacy aware, and grounded in real environment. Leon can operate locally, use dedicated tools instead of relying on free form guessing, and complete tasks from start to finish across deterministic workflows and agent style execution.
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Frequently asked questions
Is nanobot or Leon more popular?
nanobot has 48,302 GitHub stars and Leon has 17,519. nanobot has the larger community by that measure.
Are nanobot and Leon free?
Both are open source. nanobot is licensed under MIT and Leon under MIT. Neither carries a licence fee.
What is the difference between nanobot and Leon?
nanobot 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, nanobot or Leon?
Choose nanobot if you want the larger community (48,302 stars) or its MIT licence terms. Choose Leon if its feature set, stack or MIT licence fits better. Both are self-hostable.