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. observed · 2026-09-01
Health v2 · maintenance only
95/100
- Activity 100
- Release rhythm 86
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: 47
- age_days: 4737
- days_rel: 13
- days_push: 3
- n_releases_24m: 18
Adoption not part of the score
1128 stars · 175 forks observed · 2026-09-01
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Fess is an open-source, self-hosted enterprise search server built on OpenSearch with a browser-based admin UI, built-in crawlers for web sites, file systems, and databases, and a ready-made search UI with REST API. It supports 20+ languages, role-based result filtering, SSO, and AI/RAG semantic search features.
Use cases
- self-host a site search engine for my website
- crawl and index PDFs and Office documents for full-text search
- replace Google Site Search with an open-source alternative
- build an internal enterprise search over file shares and databases
- add semantic search and RAG over company documents
- search across multiple data sources from one search box
When to choose
- you need a turnkey search server with crawler, admin UI, and search UI included
- you want self-hosted search with permission-aware results and SSO
- you need multilingual full-text search without building on raw OpenSearch/Lucene
When to avoid
- you need a lightweight embedded search library inside a single application
- you want fully managed cloud search without operating infrastructure
- your data sources require custom connectors not covered by its crawlers or plugins
Facets
service · maturity active
search-engine web-scraping rag llm-inference api-framework self-hosted self-hosted web-development jvm windows self-hosted full-text-search crawler opensearch site-search semantic-search rest-api enterprise-search document-indexing search natural-language-processing docker linux macos web-server
3 sources
- readme: https://github.com/codelibs/fess · fetched 2026-09-01 · 5338d84ea76b
- homepage: https://fess.codelibs.org · fetched 2026-08-29 · 8c27b79a0594
- site_page: https://fess.codelibs.org/documentation.html · fetched 2026-08-29 · 0f8fb7223d35
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| codelibs/fess | main | 95 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem