Ambar vs Open Semantic Search
A side-by-side comparison of two self-hosted document management options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Ambar | Open Semantic Search |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 15 · At risk | 20 · At risk |
| Status | Archived | Actively maintained |
| Category | Document Management | Document Management |
| License | Apache-2.0 | GPL-3.0 |
| Language | JavaScript | Shell |
| Setup difficulty | Medium | Hard |
| Min. RAM | 2,048 MB | 4,096 MB |
| Deployment | docker, source | docker, bare-metal, source |
| GitHub stars | ★ 1,943 | ★ 1,213 |
| First released | 2017 | 2014 |
| Replaces | DocuWare, M-Files | DocuWare, M-Files |
What are Ambar and Open Semantic Search?
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
Open Semantic Search
Open Semantic Search is an open-source search engine and integrated text analytics suite for searching, monitoring, and analyzing large collections of documents. It supports OCR and entity extraction.
- Full-text and faceted search
- OCR of scanned documents
- Named entity extraction
- Document tagging
Ambar vs Open Semantic Search: key differences
The biggest difference is maintenance: Ambar's repository is archived and no longer developed, while Open Semantic Search is actively maintained. Ambar is written in JavaScript, while Open Semantic Search is built with Shell. Licensing differs — Apache-2.0 for Ambar versus GPL-3.0 for Open Semantic Search. Ambar is the lighter option, starting around 2,048 MB of RAM against 4,096 MB for Open Semantic Search. Open Semantic Search is the more established project (first released 2014), while Ambar arrived in 2017.
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 Open Semantic Search if…
- Powerful analytics on archives
- Handles many file formats
Watch out for
- Heavy resource requirements
- Complex to set up
Frequently asked questions
Is Ambar or Open Semantic Search better?
Ambar is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Ambar if its specific feature set fits your needs better.
Are Ambar and Open Semantic Search free and open-source?
Yes. Ambar is licensed under Apache-2.0 and Open Semantic Search under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Ambar and Open Semantic Search with Docker?
Ambar: yes. Open Semantic Search: yes.
Which is lighter on resources, Ambar or Open Semantic Search?
Ambar has the smaller minimum footprint at 2,048 MB of RAM, compared to about 4,096 MB for Open Semantic Search. Real-world usage depends on library size, user count, and enabled features.