This chapter charts the history of interaction between Christians, atheists, and Muslims online. Starting by looking at the Internet as a site of social interaction, it describes how interaction between Christianity and Islam have emerged in online spaces, and how 'conversion' and 'reversion' are understood in both religions. The development of so called 'new atheism' is also presented, particularly as it relates to communities in online spaces. The chapter shows how social networking sites create unique contexts in which users must appeal to a variety of different audiences and argues that there has been an influence of Evangelical Christianity on the ways in which faith is discussed online, with a mixture of focus on faith and evidence as well as personal experiences.