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  • Alexa Internet

    Alexa was founded as an independent company in 1996 and acquired by Amazon in 1999. Its toolbar collects data on Internet browsing behavior and transmits them to the Alexa website, where they are stored and analyzed. This is the basis for the company's web traffic reporting, including its Alexa Rank. According to its website, Alexa provides web traffic data, global rankings, and other information on 30 million websites. As of 2018, its website is visited by over 3 million people every month.

    Alexa's operations grew to include archiving of web pages as they are "crawled" and examined by an automated computer program (nicknamed a "bot" or "web crawler"). This database served as the basis for the creation of the Internet Archive accessible through the Wayback Machine. In 1998, the company donated a copy of the archive, two terabytes in size, to the Library of Congress. Alexa continues to supply the Internet Archive with Web crawls. In 1999, as the company moved away from its original vision of providing an "intelligent" search engine, Alexa was acquired by Amazon.com for approximately US$250 million in Amazon stock.

    In April 2007, the company filed a lawsuit, Alexa v. Hornbaker, to stop trademark infringement by the Statsaholic service. In the lawsuit, Alexa alleged that Ron Hornbaker was stealing traffic graphs for profit, and that the primary purpose of his site was to display graphs that were generated by Alexa's servers. Hornbaker removed the term "Alexa" from his service name on March 19, 2007. On November 27, 2008, Amazon announced that Alexa Web Search was no longer accepting new customers, and that the service would be deprecated or discontinued for existing customers on January 26, 2009. Thereafter, Alexa became a purely analytics-focused company.

    A key metric published from Alexa Internet analytics is the Alexa Traffic Rank also simply known as Alexa Rank. It is also referred to as Global Rank by Alexa Internet and is designed to be an estimate of a website's popularity. As of May 2018 Alexa Internet's tooltip for Global Rank says the rank is calculated from a combination of daily visitors and page views on a website over a 3-month period.

    Alexa ranks sites based primarily on tracking a sample set of Internet traffic—users of its toolbar for the Internet Explorer, Firefox and Google Chrome web browsers. The Alexa Toolbar includes a popup blocker (which stops unwanted ads), a search box, links to Amazon.com and the Alexa homepage, and the Alexa ranking of the website that the user is visiting. It also allows the user to rate the website and view links to external, relevant websites. In early 2005, Alexa stated that there had been 10 million downloads of the toolbar, though the company did not provide statistics about active usage. Originally, web pages were only ranked amongst users who had the Alexa Toolbar installed, and could be biased if a specific audience subgroup was reluctant to take part in the rankings. This caused some controversies over how representative Alexa's user base was of typical Internet behavior, especially for less-visited sites. In 2007, Michael Arrington provided examples of Alexa rankings known to contradict data from the comScore web analytics service, including ranking YouTube ahead of Google.

    Using the Alexa Pro service, website owners can sign up for "certified statistics", which allows Alexa more access to a website's traffic data. Site owners input JavaScript code on each page of their website that, if permitted by the user's security and privacy settings, runs and sends traffic data to Alexa, allowing Alexa to display´or not display, depending on the owner's preference´more accurate statistics such as total pageviews and unique pageviews.

    Alexa was founded as an independent company in 1996 and acquired by Amazon in 1999. Its toolbar collects data on Internet browsing behavior and transmits them to the Alexa website, where they are stored and analyzed. This is the basis for the company's web traffic reporting, including its Alexa Rank. According to its website, Alexa provides web traffic data, global rankings, and other information on 30 million websites. As of 2018, its website is visited by over 3 million people every month.

    Alexa's operations grew to include archiving of web pages as they are "crawled" and examined by an automated computer program (nicknamed a "bot" or "web crawler"). This database served as the basis for the creation of the Internet Archive accessible through the Wayback Machine. In 1998, the company donated a copy of the archive, two terabytes in size, to the Library of Congress. Alexa continues to supply the Internet Archive with Web crawls. In 1999, as the company moved away from its original vision of providing an "intelligent" search engine, Alexa was acquired by Amazon.com for approximately US$250 million in Amazon stock.