The aim of this article is to put in evidence the relationships between the digital democracy (e-democracy) and the rise of a global public sphere. To study the implications of the diffusion of the web based tools in democratic processes we need to analyse the technologies capacity of regeneration and reshaping of institutions and procedures of liberal democracies, including their potential to give new opportunities for political inclusion: from the e-voting technicalities to the web-based platform for civic participation to the creation of a new public sphere centred on discursive and participatory/deliberative practices (della Porta, Rucht 2013). This article frames the e-democracy and the open government processes within the perspective of the "public horizons" (Volkmer 2014), a concept more undefined but in the same time more functional than that of the public sphere. The article also provides an overview of the different experiences of e-participation and digital democracy, identifying the participatory democracy and the deliberative practices as social processes, suitable to overcome the ambiguous concept of liquid democracy.
Keywords: Digital Democracy; Open Government; Deliberative Democracy; Active Citizenship; Public Sphere.