Alexa Internet, Inc. is an American web traffic analysis
company based in San Francisco. It is a subsidiary of Amazon.
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 well-known 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.