Anomic - Provides the software for YACY - a distributed Web crawler and caching HTTP/HTTPS proxy.
ApproxiMatch - Enterprise search solutions based on fuzzy string matching algorithms. Gives brief biographies of the management, details of technology, products and applications, and news.
aTerra - Builds category specific search engines for web sites. Also develops autonomous intelligent search agents.
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.
Content Analyst - Provides patented software that uses both advanced mathematics and machine learning to provide conceptual search. Company profile, technologies, markets and partners.
Convera - Provider of vertical search services for publishers. Company profile, news, events and customer case study.
Fast Search - The Norwegian company that developed the AllTheWeb search engine. Corporate background, products, technology, news and events.
Local Matters - Provider of advanced search and content for media publishers and directory assistance service providers.
Northern Light - Provides search and content integration solutions for enterprises and individuals, includes services and technology licensing details.
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.
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.
Search Solutions, Inc. - Develops search portals based on Google's web index and search appliance technology.
Search Wikia - Jimmy Wales and Wikia aim to create a an open source Internet search engine, to which the community can contribute.
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.
WorldLight - The company which produces the search engine Entire Web explains its background, products and partners.
