American radio stations generated a total revenue of almost 15 billion U.S. dollars in 2016, of which 810 million dollars was generated online. Pandora Corporate is the frontrunner in the online radio market, consistently averaging over two million active sessions. Spotify is also a big player in the industry and almost 200 million unique visitors used its website in 2017.
The omnipresence of advertising on radio, heard in cars as well as in public areas, is an incentive for many businesses to invest in this medium of advertising. The leading investor in radio advertising is the Comcast Corporation. In 2016, this company spent 179.4 million dollars on radio advertising, in comparison to the 176.2 million spent by T-Mobile US in second place.