Music Streaming Wars: Top 8 Contenders

Piki
7 of 9

Piki

Background: From the makers of Turntable.fm comes Piki, a Pandora-style radio app that serves up songs hand-picked by friends. Launched in December last year, it bills itself as a "music discovery application" that can be used with Spotify.

Specs: Free on mobile and desktop, Piki is super social--you can dedicate, share, and build playlists with friends--and has no listening limit. An Android app is due sometime this summer.

Is it working? Turntable.fm has kept its user numbers and growth close to the vest. The company is rumored to have raised $7 to $7.5 million at a $37.5 valuation.