Open Source software has been recently recognized by governments as a viable and cost effective solution. However, transition to open source is not a plug-and-play process but one that requires deep knowledge of open source dynamics and of organization’s operations, budgetary constraints, capacities, ethics and political agenda. As with any IT transition, there are uncertainties and risks that need to be handled in order to maximize the gains for the organization and for the society through the provided services. In this paper we present a feasibility study conducted in 15 Greek public sector organizations with the aim to discover the value this transition brings to a typical public sector organization.