Krystal DMS vs OpenDocMan
A side-by-side comparison of two self-hosted document management options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Krystal DMS | OpenDocMan |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Category | Document Management | Document Management |
| License | GPL-3.0 | GPL-2.0 |
| Language | Java | PHP |
| Setup difficulty | Medium | Medium |
| Min. RAM | 1,024 MB | 512 MB |
| Deployment | bare-metal, source | bare-metal, docker, source |
| GitHub stars | ★ 50 | ★ 283 |
| First released | 2012 | 2004 |
| Replaces | DocuWare | DocuWare, M-Files |
What are Krystal DMS and OpenDocMan?
Krystal DMS
Krystal DMS is an open-source document management system that helps organizations store, index, and retrieve documents through a web interface. It includes metadata management, search, and permission controls.
- Metadata indexing
- Document search
- Role permissions
- Web interface
OpenDocMan
OpenDocMan is an open-source, web-based document management system written in PHP. It features fine-grained access control, automated check-in and check-out, and file metadata management.
- Fine-grained file access control
- Check-in and check-out
- File metadata and categories
- LDAP support
Krystal DMS vs OpenDocMan: key differences
Krystal DMS is written in Java, while OpenDocMan is built with PHP. Licensing differs — GPL-3.0 for Krystal DMS versus GPL-2.0 for OpenDocMan. OpenDocMan is the lighter option, starting around 512 MB of RAM against 1,024 MB for Krystal DMS. OpenDocMan is the more established project (first released 2004), while Krystal DMS arrived in 2012. OpenDocMan has the considerably larger community, at 283 GitHub stars versus 50. OpenDocMan lists first-class Docker deployment; Krystal DMS does not.
Why pick each one
Choose Krystal DMS if…
- Straightforward feature set
- Free to use
Watch out for
- Limited modern tooling
- Sparse documentation
Choose OpenDocMan if…
- Runs on a standard LAMP stack
- Simple to deploy
Watch out for
- Dated interface
- Limited modern features
Frequently asked questions
Is Krystal DMS or OpenDocMan better?
Neither is universally better. OpenDocMan has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Krystal DMS and OpenDocMan free and open-source?
Yes. Krystal DMS is licensed under GPL-3.0 and OpenDocMan under GPL-2.0. Both can be self-hosted at no software cost.
Can I run Krystal DMS and OpenDocMan with Docker?
Krystal DMS: check the project docs for container support. OpenDocMan: yes.
Which is lighter on resources, Krystal DMS or OpenDocMan?
OpenDocMan has the smaller minimum footprint at 512 MB of RAM, compared to about 1,024 MB for Krystal DMS. Real-world usage depends on library size, user count, and enabled features.