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YaCy (pronounced as "ya see") is a free and open source (GPL-licensed) distributed search engine. Using principles of peer-to-peer (P2P) networks, it is fully decentralized. That means all users of the search engine network are equal, and the network does not store user search requests, which makes it impossible for anyone to censor the content of the shared index.

YaCy also helps to prevent spam in search results by performing link verification as part of the search process.

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