<P> Pandora has created two market segments, one for Spanish listeners, and another for English listeners . By creating multiple market segments, Pandora's advertising is customized to its users' needs . In order to create the first two market segments, the company cross-referenced its registered user data with U.S. census . Then, the cross reference allows the company to identify zip codes with high populations of Hispanic and Spanish - speaking people, and finally it ran tests overlaying the two data sets to infer which listeners fit into those buckets . </P> <P> Starting in the early 2010s, new entrants entered the personalized radio market, such as Grooveshark (launched 2007), iHeartRadio (launched 2008), Mog.com, TuneIn (founded 2002), AccuRadio, Rhapsody (launched 2001), and Europe's Spotify, all threatening to use the concept of "true" on - demand access to online music as a challenge to Pandora's personalized radio . </P> <P> Europe's most popular online streaming music service, Spotify, launched in 2006 and arrived in the U.S. in mid-2011 . As of 2016, Spotify has a catalogue of over 30 million songs compared to Pandora's library of around 1.5--2 million . As pointed out by editors Miranda Ferrara and Michele LaMeau, "Spotify allows users to upload their own songs to the online library . While Pandora allows listeners to connect to the social media site Facebook to see what their friends are listening to, Spotify users can quickly and easily share playlists with their friends through Facebook, Twitter, email, and SMS text messages". </P> <P> The second competitor that is targeting Pandora's personalized radio appeal is iHeartRadio . Editors Miranda Ferrara and Michele LaMeau note "iHeartRadio is the largest radio operator in the United States with 237 million listeners and 800 stations in 150 markets, iHeartRadio, like Pandora, offers listeners the opportunity to like or dislike a song in order to receive recommendations on other tunes . It also offers custom tools that allow the listener to discover new artists or more songs based on existing choices". </P>

How many songs are in pandora's library