Cost: Free with commercials; $3 a month for commercial-free listening and mobile access.
How it Works: Name favorite artists to create a custom radio station. Or use the free tool, the Scrobbler. It analyzes your music choices to provide recommendations from the 14.7 million tunes in the collection.
Cool Perks: Users get local concert suggestions and entertaining stats and graphs about their listening habits.
Drawbacks: You can’t store and listen to your Last.fm music offline. No Beatles.
Best for: Budget-minded listeners looking for music similar to what they already know and like.