Anomic
   Provides the software for YACY - a distributed Web crawler and caching HTTP/HTTPS proxy.
   http://www.yacy.net/

ApproxiMatch
   Enterprise search solutions based on fuzzy string matching algorithms. Gives brief biographies of the management, details of technology, products and applications, and news.
   http://www.approximatch.com

CloserLook Search
   Builds custom vertical search engines for businesses and portals. Displays sample topical searches and provides news and information on its technology, which includes invisible web search.
   http://www.closerlooksearch.com

Content Analyst
   Provides patented software that uses both advanced mathematics and machine learning to provide conceptual search. Company profile, technologies, markets and partners.
   http://www.contentanalyst.com

Convera
   Provider of vertical search services for publishers. Company profile, news, events and customer case study.
   http://www.convera.com/

Fast Search
   The Norwegian company that developed the AllTheWeb search engine. Corporate background, products, technology, news and events.
   http://www.fastsearch.com/

Local Matters
   Provider of advanced search and content for media publishers and directory assistance service providers.
   http://www.localmatters.com

Northern Light
   Provides search and content integration solutions for enterprises and individuals, includes services and technology licensing details.
   http://www.northernlight.com/

Quintura
   Has developed a downloadable context-based web search client using data clustering, visualization and context management, which works together with the major search engines. Includes company profile, demonstration and weblog.
   http://www.quintura.com/

Relona
   A division of Coroman Systems, Inc., which has developed a self-correcting search algorithm and a presentation of results that combines searching and browsing. Explains the technology and its benefits.
   http://www.relona.net

Search Solutions, Inc.
   Develops search portals based on Google's web index and search appliance technology.
   http://www.searchsi.com/

Search Wikia
   Jimmy Wales and Wikia aim to create a an open source Internet search engine, to which the community can contribute.
   http://search.wikia.com/wiki/Search_Wikia

Seekport
   A European provider of white-label search services to portals, Internet Service Providers (ISPs) and media corporations integrating functionality into their own offerings. Mission statement, company structure and description of services.
   http://www.seekport.biz/

WorldLight
   The company which produces the search engine Entire Web explains its background, products and partners.
   http://www.worldlight.com/

aTerra
   Builds category specific search engines for web sites. Also develops autonomous intelligent search agents.
   http://www.aterra.com/