head to head · open source
Khoj vs zotero-AI-Butler
Khoj has 37,439 GitHub stars, 2,489 forks, 148 open issues and last shipped 2 months ago. zotero-AI-Butler has 1,747 stars, 97 forks, 17 open issues and last shipped 8 days ago. Khoj leads on adoption by 2,043% (37,439 vs 1,747 stars). Khoj is written in Python under AGPL-3.0; zotero-AI-Butler is written in TypeScript under AGPL-3.0. Khoj has attracted 7% as many forks as stars, zotero-AI-Butler 6%. zotero-AI-Butler was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, 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
| Khoj | zotero-AI-Butler | |
|---|---|---|
| GitHub stars | ★ 37K | ★ 1.7K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | Python | TypeScript |
| Last push | 2026-08-02 | 2026-09-14 |
| Forks | ⑂ 2.5K | ⑂ 97 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Khoj if
- You weight community size — 37K 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 zotero-AI-Butler if
- You want the zotero-AI-Butler feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and zotero-AI-Butler fits your workflow better
About Khoj
Khoj is a self hostable, open source AI second brain written in Python that turns any local or online large language model into a personal research, automation, and agent platform for individuals, small teams, and enterprises that want their documents and queries kept under their own control.
About zotero-AI-Butler
zotero AI Butler is a free, open source Zotero plugin written in TypeScript and licensed under AGPL 3.0 that calls large language models to read the PDFs already sitting in a Zotero library and writes the results back as native Zotero notes, built for researchers, students, and anyone whose "read later" pile has outgrown their reading time.
read the full zotero-AI-Butler overview →
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Frequently asked questions
Is Khoj or zotero-AI-Butler more popular?
Khoj has 37,439 GitHub stars and zotero-AI-Butler has 1,747. Khoj has the larger community by that measure.
Are Khoj and zotero-AI-Butler free?
Both are open source. Khoj is licensed under AGPL-3.0 and zotero-AI-Butler under AGPL-3.0. Neither carries a licence fee.
What is the difference between Khoj and zotero-AI-Butler?
Khoj is written in Python and zotero-AI-Butler 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, Khoj or zotero-AI-Butler?
Choose Khoj if you want the larger community (37,439 stars) or its AGPL-3.0 licence terms. Choose zotero-AI-Butler if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.