Here is a quick summary:
DuckDuckGo The search engine with the funny name, DuckDuckGo, has a serious mission—protect users’ privacy. It’s very outspoken in presenting itself as an option to Google. “Google tracks you. We don’t.” DuckDuckGo does not collect or share personal information.
Blekko From the Blekko website: “We believe search should be open, transparent, and collaborative.” It does not “attempt to gather all of the world’s information. We purposefully bias our index away from sites with low quality content.” Blekko also deletes users’ search logs within 48 hours.
Hakia.com is a semantic search engine that brings relevant results based on concept match rather than keyword match or popularity ranking. Its public web search engine is still available. It focuses on bringing quality results in all segments including Web, News, Blogs, hakia Galleries, Credible Sources, Video, and Images.
Aerohakia is specifically customized for the aerospace industry.
MoodTRADE.com is an investment tool that “harnesses a breakthrough technology” to enable an investor to instantly assess the character and impact of all available information from traditional news, online, and social media on a company’s valuation.
newpubmed.com is a search engine that searches through 20-plus million abstracts in the Pubmed database of medical documents. NewPubmed.com is a free service to the health community, and is a demonstration of the semantic capabilities of hakia.
Wolfram Alpha reports that it isn’t a search engine. It’s a “computational knowledge engine.” It generates output by doing computations from its own internal knowledgebase, instead of searching the web and returning links. Since its launch in 2009, it has continually added new data sources and tools, including apps for mobile devices.