Ambar vs Krystal DMS
A side-by-side comparison of two self-hosted document management options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Ambar | Krystal DMS |
|---|---|---|
| Deploy effort | Under-an-hour setup | Read-the-docs project |
| Status | Archived | Actively maintained |
| Category | Document Management | Document Management |
| License | Apache-2.0 | GPL-3.0 |
| Language | JavaScript | Java |
| Setup difficulty | Medium | Medium |
| Min. RAM | 2,048 MB | 1,024 MB |
| Deployment | docker, source | bare-metal, source |
| GitHub stars | ★ 1,943 | ★ 50 |
| First released | 2017 | 2012 |
| Replaces | DocuWare, M-Files | DocuWare |
What are Ambar and Krystal DMS?
Ambar
Ambar is an open-source document search engine that automatically crawls, OCRs, and indexes documents from configured sources. It provides a fast unified search across many file types.
- Automatic document crawling
- OCR on images and PDFs
- Unified full-text search
- Tagging and labels
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
Ambar vs Krystal DMS: key differences
The biggest difference is maintenance: Ambar's repository is archived and no longer developed, while Krystal DMS is actively maintained. Ambar is written in JavaScript, while Krystal DMS is built with Java. Licensing differs — Apache-2.0 for Ambar versus GPL-3.0 for Krystal DMS. Krystal DMS is the lighter option, starting around 1,024 MB of RAM against 2,048 MB for Ambar. Krystal DMS is the more established project (first released 2012), while Ambar arrived in 2017. Ambar has the considerably larger community, at 1,943 GitHub stars versus 50. Ambar lists first-class Docker deployment; Krystal DMS does not.
Why pick each one
Choose Ambar if…
- Fast search across many sources
- Good OCR coverage
Watch out for
- Development has slowed
- Elasticsearch increases memory needs
Choose Krystal DMS if…
- Straightforward feature set
- Free to use
Watch out for
- Limited modern tooling
- Sparse documentation
Frequently asked questions
Is Ambar or Krystal DMS 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 Krystal DMS free and open-source?
Yes. Ambar is licensed under Apache-2.0 and Krystal DMS under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Ambar and Krystal DMS with Docker?
Ambar: yes. Krystal DMS: check the project docs for container support.
Which is lighter on resources, Ambar or Krystal DMS?
Krystal DMS has the smaller minimum footprint at 1,024 MB of RAM, compared to about 2,048 MB for Ambar. Real-world usage depends on library size, user count, and enabled features.