Alexa Internet

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Alexa Internet, Inc. was an American web traffic analysis company based in San Francisco, California. It was founded as an independent company by Brewster Kahle and Bruce Gilliat in 1996. Alexa provided web traffic data, global rankings, and other information on over 30 million websites. It was acquired by Amazon in 1999 for $250 million in stock. Amazon discontinued the Alexa Internet service on May 1, 2022. Alexa estimated website traffic based on a sample of millions of Internet users using browser extensions as well as from sites that had chosen to install an Alexa script. As of 2020, its website was visited by over 400 million people every month.

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