head to head · open source
nanobot vs errbot
nanobot has 49,806 GitHub stars, 8,711 forks, 775 open issues and last shipped yesterday. errbot has 3,312 stars, 628 forks, 45 open issues and last shipped 10 days ago. nanobot leads on adoption by 1,404% (49,806 vs 3,312 stars). nanobot is written in Python under MIT; errbot is written in Python under GPL-3.0. nanobot has attracted 17% as many forks as stars, errbot 19%. nanobot was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (chatbot, chatops), 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 | errbot | |
|---|---|---|
| GitHub stars | ★ 50K | ★ 3.3K |
| License | MIT | GPL-3.0 |
| Written in | Python | Python |
| Last push | 2026-11-04 | 2026-10-26 |
| Forks | ⑂ 8.7K | ⑂ 628 |
| 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 errbot if
- You want the errbot feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Python
- You evaluated both and errbot 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 errbot
.. image:: :target: .. image:: :target: .. image:: :target: :alt: Latest Version .. image:: :target: :alt: License .. image:: :target: :alt: Join the chat at Errbot ====== Errbot is a chatbot. It allows you to start scripts interactively from your chatrooms for any reason: random humour, chatops, starting a build, monitoring commits, triggering alerts... It is written and easily extensible in Python. Errbot is available as open source software and released under the GPL v3 license. Features Chat servers support Built in IRC support Telegram support XMPP support With add ons Slack support (See instructions )…
read the full errbot overview →
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Frequently asked questions
Is nanobot or errbot more popular?
nanobot has 49,806 GitHub stars and errbot has 3,312. nanobot has the larger community by that measure.
Are nanobot and errbot free?
Both are open source. nanobot is licensed under MIT and errbot under GPL-3.0. Neither carries a licence fee.
What is the difference between nanobot and errbot?
nanobot is written in Python and errbot in Python. 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 errbot?
Choose nanobot if you want the larger community (49,806 stars) or its MIT licence terms. Choose errbot if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.