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.