codelibs / fess
Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.
Why this job: says: rag, semantic search; topics: rag, semantic-search
What it does
- Full-text search with faceting, sorting, and search suggestions
- Crawlers for web sites, file systems, and data stores (databases, cloud storage, and SaaS)
- Support for many document formats, including Microsoft Office, PDF, and archives
- Browser-based administration UI and a REST API
- Role- and permission-based filtering of search results
Get started
No single install command. Read the steps in the README (opens in new tab)
- Maintenance
- Active
- Last commit yesterday
- Stars
- 1,145
- +3 this week
- Licence
- Apache-2.0
- Allows business use
- Downloads for
- Linux
- From the latest release
- Latest tag
- fess-15.9.0
- Released 25 days ago
- Built with
- Java
- 96% of the code
Is it looked after?
- Contributors
- 2
- Last 90 days
- Issues
- 99% closed
- 15 still open
- Pull requests
- 1,080 merged
- 1 waiting
- Releases
- 184
- 8 in the last year
- No contributing guide
- No security policy
- No code of conduct
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More: download files, languages, topics and project record
Languages
- Java 96%
- JavaScript 3%
- HTML <1%
- Shell <1%
Topics
- java
- elasticsearch
- full-text-search
- lucene
- crawler
- enterprise-search
- search-engine
- search
- ai-search
- docker
- elasticsearch-alternative
- llm
Project record
- JobRAG and search
- StatusListed
- Commits5,387
- Forks177
- Watching58
- Stars in 28 days+4
- CreatedSep 13, 2013
- First seen by usNov 7, 2026
- CheckedNov 9, 2026