head to head · open source
nanobot vs Kai
nanobot has 49,806 GitHub stars, 8,711 forks, 775 open issues and last shipped yesterday. Kai has 1,330 stars, 210 forks, 127 open issues and last shipped 3 days ago. nanobot leads on adoption by 3,645% (49,806 vs 1,330 stars). nanobot is written in Python under MIT; Kai is written in Kotlin under Apache-2.0. nanobot has attracted 17% as many forks as stars, Kai 16%. 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 | Kai | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 1.3K |
| License | MIT | Apache-2.0 |
| Written in | Python | Kotlin |
| Last push | 2026-11-04 | 2026-11-02 |
| Forks | ⑂ 8.7K | ⑂ 210 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick nanobot if
- You weight community size — 50K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Kai if
- You want the Kai feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Kotlin
- You evaluated both and Kai fits your workflow better
About nanobot
English 简体中文 繁體中文 Español Français Bahasa Indonesia 日本語 한국어 Русский Tiếng Việt Discord · X · WeChat / Feishu nanobot 🐈 nanobot is an ultra lightweight, open source, self hosted personal AI agent framework written in Python. It runs in a WebUI, terminal, or chat apps and combines tools, long term memory, MCP integrations, model routing, multi agent delegation, scheduled automation, and an OpenAI compatible API in a small, readable core. Start Here What can nanobot do? nanobot is a self hosted personal AI agent runtime. It can: run in a browser WebUI or terminal connect to Telegram, Discord, Slack, WeChat, Email…
read the full nanobot overview →
About Kai
Kai 9000 An open source AI assistant with persistent memory that runs on Android, iOS, Windows, Mac, Linux, and Web . Website Documentation Sponsor: Atlas Cloud Installation Homebrew (macOS): AUR (Arch Linux): Winget (Windows): Direct Downloads AI That Builds Screens, Not Just Text Kai 9000's Interactive UI lets the AI generate full interactive screens — quizzes, dashboards, recipes, brainstorms, and more. Navigate by tapping buttons instead of scrolling through chat. Features Persistent memory — Kai remembers important details across conversations and uses them automatically Customizable soul — Define the AI's…
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Frequently asked questions
Is nanobot or Kai more popular?
nanobot has 49,806 GitHub stars and Kai has 1,330. nanobot has the larger community by that measure.
Are nanobot and Kai free?
Both are open source. nanobot is licensed under MIT and Kai under Apache-2.0. Neither carries a licence fee.
What is the difference between nanobot and Kai?
nanobot is written in Python and Kai in Kotlin. 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 Kai?
Choose nanobot if you want the larger community (49,806 stars) or its MIT licence terms. Choose Kai if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.