head to head · open source
AstrBot vs Onyx
AstrBot has 40,639 GitHub stars, 2,927 forks, 1,516 open issues and last shipped 2 days ago. Onyx has 32,149 stars, 4,478 forks, 451 open issues and last shipped yesterday. AstrBot leads on adoption by 26% (40,639 vs 32,149 stars). AstrBot is written in Python under AGPL-3.0; Onyx is written in Python under a custom or non-standard licence. AstrBot has attracted 7% as many forks as stars, Onyx 14%. Onyx was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (ai, chatgpt, llm), 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 | Onyx | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 32K |
| License | AGPL-3.0 | Custom / other |
| Written in | Python | Python |
| Last push | 2026-09-17 | 2026-09-18 |
| Forks | ⑂ 2.9K | ⑂ 4.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick AstrBot if
- You weight community size — 41K 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 Onyx if
- You want the Onyx feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Python
- You evaluated both and Onyx fits your workflow better
About AstrBot
AstrBot is an open source all in one Agent chatbot platform written in Python and licensed under AGPL 3.0. It integrates with mainstream instant messaging applications and provides conversational AI infrastructure for individuals, developers, and teams. The project lives in the AI and machine learning ecosystem, specifically the AI interaction and interfaces category, and it has been developed over roughly four years. Its repository carries 40,504 stars and 2,915 forks, and its documented homepage is astrbot.app. Topics attached to the project include agent, ai, chatbot, chatgpt, discord, docker, gemini, gpt, lla…
read the full AstrBot overview →
About Onyx
Onyx is an open source AI application layer that gives teams a self hostable chat interface with retrieval augmented generation over their own company data and more than 50 indexing connectors.
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Frequently asked questions
Is AstrBot or Onyx more popular?
AstrBot has 40,639 GitHub stars and Onyx has 32,149. AstrBot has the larger community by that measure.
Are AstrBot and Onyx free?
Both are open source. AstrBot is licensed under AGPL-3.0, and Onyx has no licence declared in this registry. Both are free to self-host.
What is the difference between AstrBot and Onyx?
AstrBot is written in Python and Onyx 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, AstrBot or Onyx?
Choose AstrBot if you want the larger community (40,639 stars) or its AGPL-3.0 licence terms. Choose Onyx if its feature set, stack or Custom / other licence fits better. Both are self-hostable.