Social music-sharing service
*Est. $5 per month and up; free version available
Most experts prefer MOG or Spotify overall, but if you like your music streaming to be a more social experience, Rdio shines. The service encourages users to see what other users are listening to, and you can send others song recommendations in-service. Multiple users can collaborate to create playlists; you can also listen to radio stations composed of tracks your friends are listening to. However, if you aren't interested in the social interaction, reviewers say MOG offers better audio quality and a slightly higher level of polish overall. Like MOG, Rdio has strict time limits for free listening.