Available Open Access digitally under CC-BY-ND licence This book pulls back the curtain on the link between activism, media and technology in the quiet times of politics when people are not protesting. Introducing the novel concept of the 'data stream', it explores the intricate ways in which activists interact daily with various types of data and how they navigate the impact of digitalization and datafication on today's grassroots politics. Through rich, empirical data from Greece, Spain and Italy, Activists in the Data Stream makes a nuanced contribution to our understanding of activists' daily political engagement in an ever-changing media and political landscape.