Platform cooperatives that are owned and governed by gig workers themselves have been proposed as a silver bullet to improve these workers’ influence on organizational decision-making. However, they remain relatively rare compared with dominant investor-owned platforms. Traditionally, worker cooperatives strive for alternative organizing based on the ideal of workplace democracy but are often faced with unequal participation by members in decision-making processes. To test for participation inequalities, this study used survey data (n = 418) from a network of four platform worker cooperatives in Italy. The results show that members with lower affective commitment towards their cooperative and less social capital among other members are less likely to participate, but that there is no effect of cooperative size and human capital.