Swell Radio was a mobile radio streaming application that learned user listening preferences based on listening behavior, community filtering, and a proprietary algorithm.

Originally designed for use while commuting to and from work, the service focused on delivering spoken-word audio content to users.

[2] Major streaming partners included ABC News Radio, NPR, PRI, and TED According to the company website, the app was available on iOS devices worldwide but content was customized to the United States and Canada.

In July 2014, Apple acquired the technology behind the Swell app for $30 million, discontinuing the app and folding its backbone and technology into Apple Podcasts.

[3] Concept.io, creator of Swell Radio, raised $5.4 million in Series A Funding led by venture capital firm Draper Fisher Jurvetson.