Spotify a customer base of one million paying subscribers across Europe, and by September 2011, the number of paying subscribers had doubled to two million. In August 2012, "Time" reported 15 million active users, four million being paying Spotify subscribers. User growth continued, reaching 20 million total active users, including 5 million paying customers globally and 1 million paying customers in the United States, in December 2012. By March 2013, the service had 24 million active users, 6 million being paying subscribers, which grew to 40 million users (including 10 million paying) in May 2014, 60 million users (including 15 million
Pandora Radio of which there are 2,000. Examples of these are rhythm syncopation, key tonality, and vocal harmonies. In October 2014, less than 5 percent of active listeners were paying subscribers. At the time of Pandora's IPO in 2011, Pandora had 800,000 tracks from 80,000 artists in its library and 80 million users. By November 2014, Pandora had approximately doubled its library size, topping 1.5 million songs. As of end of mid-year 2018, Pandora had 71.4 million active users. In September 2016, Pandora announced additional features and subscription options, including a mid-level subscription service known as "Pandora Plus" that offers advertisement-free streaming,