This article investigates gender differences in participation at the citizen assembly of Glarus, Switzerland. We use original survey data collected among 800 citizens. We find significant gender gaps both for attending and holding a speech at the assembly. Lower female attendance is particularly pronounced among older cohorts and can largely be explained by gender differences in political interest, knowledge and efficacy. In contrast, the gender gap in speaking is substantial regardless of age and cannot be reduced to factors that typically shape participation. Hence, gender differences are disappearing in voting but persist in more public, interactive forms of political engagement.