This article contributes to the debate on the domestic consequences of European integration by focusing on three aspects often neglected in the literature. First, while most works deal with the policy dimension of Europeanization, we develop a set of research hypotheses on its polity and politics implications. Its consequences on the institutions of the decision-making process, on elite conflictuality and on domestic power configuration are examined. Secondly, close attention is paid to the transmission mechanisms at work by comparing the effects of ‘direct' and ‘indirect' Europeanization to a control case where European influences are only minimal. Thirdly, we provide empirical evidence from a non-EU member country (Switzerland), a type of state for which the consequences of Europeanization are still little explored. Based on a quantitative network analysis, our empirical tests reveal some important differences in the effects of direct and indirect Europeanization.