YaCy is a powerful and reliable search engine that can be used by anyone to efficiently search the internet (including both WWW and ftp). In addition to this, it also allows you to create a personalized search portal for your own use or for others to use (whether it's for the internet or an intranet). With the capability to index billions of web pages, the scale of YaCy is virtually limitless and is only restricted by the number of users.

One of the most unique features of YaCy is its fully decentralized p2p mode, which ensures that all users in the search engine network are treated equally. This means that it is impossible for anyone to censor the content of the distributed index, ensuring complete freedom of information for all users.

Each YaCy user is either part of a large search network (search indexes can be exchanged with other installation over a built-in peer-to-peer network protocol) or the user runs YaCy to produce a personal search portal that is either public or private.

YaCy search portals can also be placed in an intranet environment, making it a replacement for commercial enterprise search solutions. A network scanner makes it easy to discover all available HTTP, FTP and SMB servers.

In addition to the features mentioned earlier, YaCy also offers several other noteworthy features such as web crawling, intranet indexing, and drop-in replacement of Google Search Appliance. Additionally, YaCy is equipped with embedded Solr, providing Solr API, and allows for peer-to-peer index sharing. With all these features combined, YaCy is an excellent choice for anyone looking for a powerful and flexible search engine solution.


  • Web Crawling
  • P2P Search Mode
  • Your Own Search Portal
  • Intranet Indexing
  • Drop-In Replacement of Google Search Appliance
  • Embedded Solr - provides Solr API
  • Peer-to-Peer Index Sharing


  1. Windows
  2. Linux
  3. macOS

GDPR Compliance

YaCy has a strong connection to privacy-aware tools. As such it does not collect personalized data. It also has no 'phoning-home' integrated. This web page does not use cookies. However, linked services may have cookies.


  • GNU General Public License version 2.0 (GPLv2)


YaCy Peer-to-Peer Search Engine
Download YaCy Peer-to-Peer Search Engine for free. Decentralized Web Search Engine. YaCy is a free search engine that anyone can use to build search the internet (www and ftp) or to create a search portal for others (internet or intranet). The scale of YaCy is limited only by the number of users and…
Home - YaCy
YaCy P2P - Decentralized Search Engine
GitHub - yacy/yacy_search_server: Distributed Peer-to-Peer Web Search Engine and Intranet Search Appliance
Distributed Peer-to-Peer Web Search Engine and Intranet Search Appliance - GitHub - yacy/yacy_search_server: Distributed Peer-to-Peer Web Search Engine and Intranet Search Appliance