OpenSign vs PDFKeeper
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?
OpenSign
Document signing software (alternative to DocuSign)
VS
PDFKeeper
Open-source PDF document management system
| Feature | OpenSign | PDFKeeper |
|---|---|---|
| Category | Document Management | Document Management |
| License | AGPL-3.0 | GPL-3.0 |
| Language | JavaScript | C# |
| Setup difficulty | Medium | Medium |
| Min. RAM | 512 MB | 512 MB |
| Deployment | docker | bare-metal, source |
| GitHub stars | ★ 6,783 | ★ 228 |
| First released | 2026 | 2014 |
| Replaces | — | DEVONthink, Mayan EDMS |
Why pick each one
Choose OpenSign if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Mature project with 6.8k GitHub stars
- Written in JavaScript
Choose PDFKeeper if…
- Released under the GPL-3.0 license
- Written in C#
- Lightweight — runs in 512 MB RAM
Frequently asked questions
Is OpenSign or PDFKeeper better?
Neither is universally better. OpenSign has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are OpenSign and PDFKeeper free and open-source?
Yes. OpenSign is licensed under AGPL-3.0 and PDFKeeper under GPL-3.0. Both can be self-hosted at no software cost.
Can I run OpenSign and PDFKeeper with Docker?
OpenSign: yes. PDFKeeper: check the project docs for container support.