Google just bought Songza. http://www.theverge.com/2014/7/1/5861864/google-acquires-songza
Google announced today that it's acquiring the streaming-music service Songza  for an undisclosed sum. Over the coming months it will be integrating the company's smart playlist creation into Google Play Music and perhaps YouTube. Songza will remain an active and independent app for the time being. The purchase highlights the increasingly competitive landscape emerging around music, as Apple, Amazon, and Google all seek to differentiate their mobile products by offering top-notch streaming services.
I do have a Songza account but honestly, I rarely use it. But there are others out there — Pandora, Last.FM, Spotify...
Do you stream music? Which service do you use?