Search Engines

• https://sushruta.bearblog.dev/private-search-engines/
• Presearch (Blockchain based)
• Ecosia Search
• Infinity Decentralized
• Crawler DB + Lucena Family (ElasticSearch or Solr)
• YaCY

About YaCY

• It uses RWI and Solr indices.
• It takes about 20 GB to index 10 million web pages
• Fast SSD and RAM is essential.

Potential Issues

• Search Engine poisoning: A botnet could poison search results.

Search Engine Libraries

• Apache Lucene (A search engine library, in Java)

Text Search Engines based on them

• Apache Solr (A search engine built with Apache Lucene, in Java)
• Elasticsearch (A search engine built with Apache Lucene)

Open Source Web Search Engines

Centralized

• Stract
• Metager
• SearX (Aggregator)
• SearXNG (Aggregator)
• Marginalia
• Searchmysite
• Wiby (Hobbyist submitted pages)

Decentralized

• YaCY (based on Apache Solr, but with )
• Infinity Decentralized

Proprietary Web Search Engines

Centralized

• Swisscows (nice UI)
• Ecosia (Bing based)
• Disconnect
• Mojeek

Decentralized

• Presearch (Based off of Ethereum blockchain / PRE tokens, may become open source)

Features

• Filters
  • Stract Search's Optics
  • Brave Search's Googles