I, Librarian vs Signature PDF
A side-by-side comparison of two self-hosted document management options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
I, Librarian
Organize PDF papers and office documents
VS
Signature PDF
Sign and manipulate PDFs with collaboration, organization, compression
| Feature | I, Librarian | Signature PDF |
|---|---|---|
| Category | Document Management | Document Management |
| License | GPL-3.0 | AGPL-3.0 |
| Language | PHP | JavaScript |
| Setup difficulty | Medium | Medium |
| Min. RAM | 512 MB | 512 MB |
| Deployment | bare-metal | docker |
| GitHub stars | ★ 346 | ★ 818 |
| First released | 2025 | 2025 |
| Replaces | — | — |
Why pick each one
Choose I, Librarian if…
- Released under the GPL-3.0 license
- Written in PHP
- Lightweight — runs in 512 MB RAM
Choose Signature PDF if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Written in JavaScript
- Lightweight — runs in 512 MB RAM
Frequently asked questions
Is I, Librarian or Signature PDF better?
Neither is universally better. Signature PDF has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are I, Librarian and Signature PDF free and open-source?
Yes. I, Librarian is licensed under GPL-3.0 and Signature PDF under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run I, Librarian and Signature PDF with Docker?
I, Librarian: check the project docs for container support. Signature PDF: yes.