Résumé : Abstract Empirical literature regarding which actors support the most participatory democracy is surprisingly scarce. Discussing the core ideological features of populist and post-materialist-centred parties, we expect that these parties emphasise participatory democracy more than their competitors. Additionally, populist parties should embody a monist demand for greater participatory democracy, while post-materialist-centred (PMC) parties should advocate a pluralist understanding of it. Drawing on party electoral manifestos, we verify these assumptions in several national elections across Europe. Our findings show mixed support for the theoretical expectations. Both post-materialist and populist parties support participatory democracy more than other parties, and their principles diverge. More precisely, our data confirm that PMC parties advocate a pluralist understanding of participatory democracy. Yet populist parties show a fuzzier picture. While populist radical right parties exhibit a monist profile, radical left populist parties are much more in line with post-materialist arguments.