head to head · open source
nanobot vs ChatUI
nanobot has 48,372 GitHub stars, 8,548 forks, 775 open issues and last shipped today. ChatUI has 4,448 stars, 427 forks, 53 open issues and last shipped 6 months ago. nanobot leads on adoption by 988% (48,372 vs 4,448 stars). nanobot is written in Python under MIT; ChatUI is written in TypeScript under MIT. nanobot has attracted 18% as many forks as stars, ChatUI 10%. nanobot was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (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 | ChatUI | |
|---|---|---|
| GitHub stars | ★ 48K | ★ 4.4K |
| License | MIT | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-20 | 2026-03-30 |
| Forks | ⑂ 8.5K | ⑂ 427 |
| 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 ChatUI if
- You want the ChatUI feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and ChatUI 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 ChatUI
ChatUI is an MIT licensed UI design language and React component library for conversational interfaces, published on npm as @chatui/core and aimed at front end teams that need a ready chat surface instead of hand built message components.
read the full ChatUI overview →
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Frequently asked questions
Is nanobot or ChatUI more popular?
nanobot has 48,372 GitHub stars and ChatUI has 4,448. nanobot has the larger community by that measure.
Are nanobot and ChatUI free?
Both are open source. nanobot is licensed under MIT and ChatUI under MIT. Neither carries a licence fee.
What is the difference between nanobot and ChatUI?
nanobot is written in Python and ChatUI 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 ChatUI?
Choose nanobot if you want the larger community (48,372 stars) or its MIT licence terms. Choose ChatUI if its feature set, stack or MIT licence fits better. Both are self-hostable.