iHeartRadio is an American freemium broadcast, podcast and radio streaming platform owned by iHeartMedia. It was founded in August 2008. As of 2019, iHeartRadio was functioning as the national umbrella brand for iHeartMedia's radio network, the largest radio broadcaster in the United States with 128 million registered users as of 2019. Its main competitors are Audacy, TuneIn and Sirius XM.