Ambar 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?
Ambar
Document search engine with OCR and tagging
VS
Signature PDF
Sign and manipulate PDFs with collaboration, organization, compression
| Feature | Ambar | Signature PDF |
|---|---|---|
| Category | Document Management | Document Management |
| License | Apache-2.0 | AGPL-3.0 |
| Language | JavaScript | JavaScript |
| Setup difficulty | Medium | Medium |
| Min. RAM | 2,048 MB | 512 MB |
| Deployment | docker, source | docker |
| GitHub stars | ★ 1,944 | ★ 818 |
| First released | 2017 | 2025 |
| Replaces | DocuWare, M-Files | — |
Why pick each one
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 Ambar or Signature PDF better?
Neither is universally better. Ambar has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Ambar and Signature PDF free and open-source?
Yes. Ambar is licensed under Apache-2.0 and Signature PDF under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Ambar and Signature PDF with Docker?
Ambar: yes. Signature PDF: yes.