head to head · open source
Zotero vs zotero-AI-Butler
Zotero has 15,443 GitHub stars, 1,137 forks, 1,600 open issues and last shipped yesterday. zotero-AI-Butler has 1,768 stars, 98 forks, 17 open issues and last shipped 3 days ago. Zotero leads on adoption by 773% (15,443 vs 1,768 stars). Zotero is written in JavaScript under a custom or non-standard licence; zotero-AI-Butler is written in TypeScript under AGPL-3.0. Zotero has attracted 7% as many forks as stars, zotero-AI-Butler 6%. Zotero was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| Zotero | zotero-AI-Butler | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 1.8K |
| License | Custom / other | AGPL-3.0 |
| Written in | JavaScript | TypeScript |
| Last push | 2026-09-30 | 2026-09-28 |
| Forks | ⑂ 1.1K | ⑂ 98 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Zotero if
- You weight community size — 15K stars and counting
- You want the Custom / other license terms
- Your stack matches JavaScript
- 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 Zotero
Zotero is a free tool for research sources. It lives in the JavaScript application ecosystem and is listed under Productivity & Utilities / Note Taking & Knowledge Management. The provided GitHub metadata reports 15,272 stars, 1,117 forks, 1,600 open issues, 0 contributors, a repository age of 0 years, and a last push timestamp of 2026 09 14T16:40:51Z. The homepage is https://www.zotero.org, and no topics are listed. The license field is NOASSERTION.
read the full Zotero overview →
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 Zotero or zotero-AI-Butler more popular?
Zotero has 15,443 GitHub stars and zotero-AI-Butler has 1,768. Zotero has the larger community by that measure.
Are Zotero and zotero-AI-Butler free?
Both are open source. Zotero has no licence declared in this registry, and zotero-AI-Butler is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Zotero and zotero-AI-Butler?
Zotero is written in JavaScript 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, Zotero or zotero-AI-Butler?
Choose Zotero if you want the larger community (15,443 stars) or its Custom / other licence terms. Choose zotero-AI-Butler if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.