|Alexa Internet, Inc.|
|Industry||Internet information providers|
|Type of site||web traffic and ranking|
|Advertising||Web banner with AdBrite|
Alexa Internet, Inc. is a California-based subsidiary company of Amazon.com that is best known for operating a website that provides information on web traffic to other websites. California ( is a US state on the West Coast of the United States, along the Pacific Ocean. A subsidiary, in business matters is an entity that is controlled by a bigger and more powerful entity Generally a company is a form of Business organization. The precise definition varies Amazoncom Inc ( is an American electronic commerce ( E-commerce) company in Seattle Washington. A website (alternatively web site or Web site, a back-construction from the Proper noun World Wide Web) is a collection of Web pages Web traffic is the amount of data sent and received by visitors to a Web site.
Alexa Internet was founded in 1996 by Brewster Kahle and Bruce Gilliat. Brewster Kahle (ˈkeɪl 'kale' (born 1960 is a US internet entrepreneur activist and digital librarian  The company offered a toolbar that gave Internet users guidance on where to go next, based on the traffic patterns of its user community. Alexa also offered context for each site visited: to whom it was registered, how many pages it had, how many other sites pointed to it, and how frequently it was updated.  Engineers at Alexa, in cooperation with the Internet Archive, created the Internet Archive's Wayback Machine. The Internet Archive ( IA) is a Nonprofit organization dedicated to maintaining an on-line Library and archive of Web and  Alexa also supplies the Internet Archive with web crawls. A web crawler (also known as a web spider, web robot, or—especially in the FOAF community— web scutter) is a program or automated
In 1999, Alexa was acquired by Amazon.com for about $250 million in Amazon stock. Amazoncom Inc ( is an American electronic commerce ( E-commerce) company in Seattle Washington. Software for Fixed assets management and Stock control developed in 2004. 
The company's premises are in Building 37 of the Presidio of San Francisco. The Presidio of San Francisco (originally El Presidio Real de San Francisco or Royal Presidio of San Francisco) is a park on the northern tip of the San
Alexa began a partnership with Google in spring 2002, and with the Open Directory Project in January 2003. Google Inc is an American public corporation, earning revenue from advertising related to its Internet search, e-mail, online The Open Directory Project ( ODP) also known as dmoz (from directory  Live Search replaced Google as a provider of search results in May 2006. Live Search (formerly Windows Live Search and MSN Search) is the name of Microsoft 's web Search engine, designed to compete with the Year 2006 ( MMVI) was a Common year starting on Sunday of the Gregorian calendar.  In September 2006, they began using their own Search Platform to serve results. In December 2006, they released Alexa Image Search. Built in-house, it is the first major application to be built on their Web Platform.
Alexa also provides "site info" for the A9.com search engine. A9com, which went live on April 14, 2004, is an Internet Search engine from Amazon
In December 2005, Alexa opened its extensive search index and web-crawling facilities to third party programs through a comprehensive set of web services and APIs. A Web service (also Web Service) is defined by the W3C as "a software system designed to support interoperable machine-to-machine interaction These could be used, for instance, to construct vertical search engines that could run on Alexa's own servers or elsewhere. Vertical search, part of a larger subgrouping known as "specialized" search is a relatively new tier in the Internet search industry consisting of Search engines Uniquely, their Web Search Platform gives developers access to their raw crawl data. In May 2007, Alexa changed their API to require comparisons be limited to 3 sites, reduced size embedded graphs be shown using Flash, and mandatory embedded BritePic ads. Adobe Flash (previously called Shockwave Flash and Macromedia Flash) is a set of Multimedia software created by Macromedia and currently 
In April 2007, Alexa v. Hornbaker was filed to stop trademark infringement by the statsaholic service. Trademark infringement is a violation of the Exclusive rights attaching to a Trademark without the authorization of the trademark owner or any licensees (provided that  In the lawsuit, Alexa alleges that Hornbaker is stealing traffic graphs for profit, and that the primary purpose of his site is to display graphs that are generated by Alexa's servers.  Hornbaker removed the term Alexa from his service name on March 19, 2007. Events 1279 - A Mongolian victory in the Battle of Yamen ends the Song Dynasty in China. Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century.  Nevertheless, it should be noted that Alexa expressly grants permission to refer its data in third-party work subject to suitable credits.
Alexa ranks sites based on visits from users of its Alexa Toolbar for Internet Explorer and from integrated sidebars in Mozilla and Netscape. The Alexa Toolbar, an application produced by Alexa Internet, is a Browser Helper Object for Internet Explorer on Microsoft Windows that is used In addition to their own statusbar extension, Sparky (released July 2007), there are several third-party extensions for Mozilla Firefox:
There is some controversy over how representative Alexa's user base is of typical Internet behavior. If Alexa's user base is a fair statistical sample of the Internet user population (e. In Statistics, a sample is a Subset of a population. Typically the population is very large making a Census or a complete Enumeration g. , a random sample of sufficient size), Alexa's ranking should be quite accurate. In reality, not much is known about the sample and possible sampling biases. A biased sample is a statistical sample of a population in which some members of the population are less likely to be included than others Alexa itself notes several examples.  A known source of bias is the self-selecting, opt-in nature of Alexa traffic tracking software installation, but the significance of this bias on rankings is not reported. Self-selection is a term used to indicate any situation in which individuals select themselves into a group. 
On April 16th, 2008 many users reported dramatic shifts in their Alexa rankings. Alexa confirmed this later in the day with an announcement that they had released the "New Alexa Ranking System" claiming that they now take into account more data sources. 
Competitors in the Internet market research space include ComScore, Hitwise, and Netcraft. Market research is the process of systematically gathering recording and analyzing data and information about Customers, Competitors and the Market comScore is an internet Marketing research company that provides marketing data and services to many of the Internet's largest businesses Hitwise is an Internet monitor which collects data directly from ISP networks Netcraft is an Internet services company based in Bath, England.