If you want an improved streaming quality and offline listening, you need a paid subscription. However, the basic features are free with advertisements or limitations. Now you can also get a freemium service on Pandora. This is an on-demand version of the service more in line with contemporary competitors. Later in 2017, Pandora Premium has been published.
Originally, Pandora was designed as an internet radio service and it was a freemium service. Pandora Music offers a subscription-based music streaming service.