Music Streaming Wars: Top 8 Contenders

Spotify
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Spotify

Background: Since it launched in 2011, Spotify has been gunning to become the industry leader, though it lags behind Pandora in terms of users--24 million with 6 million subscribers versus Pandora's 70.8 million users.

Specs: Beyond the option to build and share playlists, Spotify's $9.99 per month subscription offers radio, plus unlimited skips, and a Discover feature.

Is it working?: No. The company has yet to turn a profit, though Goldman Sachs says it's worth $3 billion and closed a $100 million funding round late last year.