Churches in Africa began using tools of social communication from the very beginning of the evangelisation process and, in so doing, helped introduce the Western press model on the African continent. Later on, cinema, radio, and, more recently, television channels and the Internet have been used as a means of communication and propaganda by diversified religious groups. Among these tools, denominational radio is currently undergoing unprecedented development. The article focuses on the diversity of these radio broadcasters, the legal framework, the way they operate and their content. It underlines the role played by some of them in development and civil society issues, and sometimes in political debate, far beyond questions strictly related to religious concerns.