head to head · open source
silverbullet vs zotero-AI-Butler
silverbullet has 6,112 GitHub stars, 485 forks, 345 open issues and last shipped 2 days ago. zotero-AI-Butler has 1,747 stars, 97 forks, 17 open issues and last shipped 8 days ago. silverbullet leads on adoption by 250% (6,112 vs 1,747 stars). silverbullet is written in TypeScript under MIT; zotero-AI-Butler is written in TypeScript under AGPL-3.0. silverbullet has attracted 8% as many forks as stars, zotero-AI-Butler 6%. silverbullet was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (knowledge-management, markdown), 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
| silverbullet | zotero-AI-Butler | |
|---|---|---|
| GitHub stars | ★ 6.1K | ★ 1.7K |
| License | MIT | AGPL-3.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-20 | 2026-09-14 |
| Forks | ⑂ 485 | ⑂ 97 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick silverbullet if
- You weight community size — 6.1K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- 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 silverbullet
SilverBullet is an open source, self hosted, browser based personal knowledge database that stores notes as Markdown pages and makes them programmable with Space Lua, aimed at individual knowledge workers who want a notes app they can script rather than merely configure.
read the full silverbullet 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 silverbullet or zotero-AI-Butler more popular?
silverbullet has 6,112 GitHub stars and zotero-AI-Butler has 1,747. silverbullet has the larger community by that measure.
Are silverbullet and zotero-AI-Butler free?
Both are open source. silverbullet is licensed under MIT and zotero-AI-Butler under AGPL-3.0. Neither carries a licence fee.
What is the difference between silverbullet and zotero-AI-Butler?
silverbullet is written in TypeScript 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, silverbullet or zotero-AI-Butler?
Choose silverbullet if you want the larger community (6,112 stars) or its MIT licence terms. Choose zotero-AI-Butler if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.