The Public Radio Exchange (PRX) is a non-profit web-based platform for digital distribution, review, and licensing of radio programs. The organization is the largest on-demand catalogue of public radio programs available for broadcast and internet use.

Public broadcasting involves radio, television, and other electronic media outlets whose primary mission is public service. Public broadcasters receive funding from diverse sources including license fees, individual contributions, public financing, and commercial financing, and avoid political interference or commercial influence.