Spotify, the recently-launched in the US music streaming services, has announced their official numbers at a creative content conference in London, and those numbers are quite impressive: 15 million active users, 4 million of those are paying subscribers. Last September they has 2 million paying customers, so they’ve effectively doubled their paying client base in less than a year.

The steaming music service has 3 tiers of service, a free, desktop-only ad-supported version, and a $5 and $10 paid options that feature no ads and several other goodies like offline listening. Spotify has added new features, such as a live radio and a new Android app, which will be launching soon.

Via [TechCrunch]

Cross-posted from TechnologyTell