Music Streaming Wars: Top 8 Contenders

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Pandora

Background: The "personalized radio" has an enviable user base--70.8 million active users as of May 2013--but not so enviable legal woes and royalty concerns.

Specs: Pandora offers a free ad-supported version, though its ads aren't great at targeting users, and an upgraded ad-free service for $3.99 per month or $36 a year. The company plans to expand to game consoles, including the PlayStation, and TV via HTML5.

Is it working? Definitely not. Despite going public in 2011, royalties and bandwidth are crippling its bottom line growth, though Pandora pays the lowest royalty rate in the industry ($0.12 per 100 songs versus $0.35 per 100 songs by Spotify).