Aleph 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 | Aleph | Open Semantic Search |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 61 · Good | 20 · At risk |
| Category | Document Management | Document Management |
| License | MIT | GPL-3.0 |
| Language | JavaScript | Shell |
| Setup difficulty | Hard | Hard |
| Min. RAM | 4,096 MB | 4,096 MB |
| Deployment | docker | docker, bare-metal, source |
| GitHub stars | ★ 2,437 | ★ 1,213 |
| First released | 2016 | 2014 |
| Replaces | DocuWare, Relativity | DocuWare, M-Files |
What are Aleph and Open Semantic Search?
Aleph
Aleph is an open-source tool for indexing, searching, and cross-referencing large collections of documents and structured data, built for investigative journalism. It performs OCR, entity extraction, and link analysis across archives.
- OCR and text extraction
- Entity cross-referencing
- Full-text document search
- Investigative archives
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
Aleph vs Open Semantic Search: key differences
Aleph is written in JavaScript, while Open Semantic Search is built with Shell. Licensing differs — MIT for Aleph versus GPL-3.0 for Open Semantic Search. Open Semantic Search is the more established project (first released 2014), while Aleph arrived in 2016. Aleph has the considerably larger community, at 2,437 GitHub stars versus 1,213.
Why pick each one
Choose Aleph if…
- Released under the MIT license
- First-class Docker support for quick deployment
- Active community (2.4k GitHub stars)
- Written in JavaScript
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 Aleph or Open Semantic Search better?
Neither is universally better. Aleph has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Aleph and Open Semantic Search free and open-source?
Yes. Aleph is licensed under MIT and Open Semantic Search under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Aleph and Open Semantic Search with Docker?
Aleph: yes. Open Semantic Search: yes.