# yacy/yacy_search_server

Distributed Peer-to-Peer Web Search Engine and Intranet Search Appliance

Repository: https://github.com/yacy/yacy_search_server
Canonical: https://ross.abutalabs.com/products/yacy_search_server
Homepage: http://yacy.net
Language: Java
License: NOASSERTION
License Family: other
Topics: decentralized, p2p, p2p-network, privacy, privacy-protection, search-engine, searchengine, web, web-search-engine, websearch, intranet-search, intranet-search-engine, webseearch-engine
Last push: 2026-08-20T22:23:14+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 35, longevity 100
- inputs: {"age_days": 4182, "days_push": 13, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4018, forks 495 (observed 2026-08-28T04:08:32.451063+00:00)

## What it is
YaCy is a full search engine application in Java that combines a web crawler, a search index server, and a web front-end. It can run standalone for personal or intranet search or join a decentralized peer-to-peer network where peers share a distributed search index.

## Use cases
- run my own web search engine
- build a private search portal for my intranet
- search the web without being tracked
- join a decentralized peer-to-peer search network
- index my organization's shared file system and web pages
- self-host a Google alternative
- crawl and index specific websites

## When to choose
- you want a self-hosted, privacy-focused search engine with no central provider
- you need an intranet or enterprise search appliance without commercial licensing
- you want to participate in or run a distributed P2P search index
- you need a built-in crawler, scheduler, and search UI in one package

## When to avoid
- you need Google-quality relevance for general web search at scale
- you want a lightweight embedded search library rather than a full server application
- you need a managed cloud search service
- you cannot run Java 17+ on your infrastructure

## Facets
- artifact type: application
- maturity: active
- function: search-engine, web-scraping, http-server, self-hosted
- domain: privacy, self-hosted, web-development, crawlers
- platform: windows, self-hosted, jvm
- tags: p2p, decentralized, web-crawler, intranet-search, dht, solr, java, search-portal, indexing, search, linux, macos, docker, web-server

## Member repositories
- yacy/yacy_search_server (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:32.451063+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:23:57.801905+00:00, confidence not recorded.
  - readme: https://github.com/yacy/yacy_search_server (fetched 2026-08-28T04:08:32.451063+00:00, sha aefcd6b0fcd5)
  - homepage: http://yacy.net (fetched 2026-08-29T09:16:48.828905+00:00, sha c4c732ebe322)
  - site_page: https://yacy.net/download_installation (fetched 2026-08-29T09:16:48.831327+00:00, sha ece0c3b23cd0)
  - site_page: https://yacy.net/docs (fetched 2026-08-29T09:16:48.833261+00:00, sha 0b1b3c05d454)
  - site_page: https://yacy.net/faq (fetched 2026-08-29T09:16:48.834783+00:00, sha 516451b9a591)
- Data as of 2026-08-30T08:39:29.467469+00:00.