In this article, we analyse the evolution of electoral information flows in Spain in the digital environment. Three post-electoral surveys (2008, 2011 and 2015) among internet users ( N = 4,312) and a series of focus groups enable us to analyse the process of expansion of the Digital Public Sphere (DPS) in Spain. We show that, instead of disintermediation, new intermediations of the electoral information flows appear. The candidacies no longer monopolize the electoral communication; rather, they share spaces in the DPS with personal contacts and civic-social organizations. We observe that, for the first time, in the 2015 elections, the influence exercised by the digital media – particularly social media – exceeded the information received directly from people they know, print media and radio. However, television remained the most influential media during the elections. We note that the use of the DPS in electoral campaigns is increasingly hybrid and dialogical. We find that, in the Spanish case, these changes are linked to the emergence of the 15M movement, which encouraged the emergence of internet-based civil organizations. The traditional political players continue to occupy a very significant role as a source of electoral information, but they share space with this new type of civil organization and with the extensive network of digital contacts. Changes in the Spanish DPS between 2008 and 2015 evidence a greater diversity in information sources and more citizens play an increasingly active role in the creation, modification and dissemination of political content.