Abstract Although many Internet users have encountered hate speech online, interventions against those incidents are unlikely. To learn more about online counteractions against hate speech, which we conceptualize as a form of online civic participation, we conducted an online survey representing adult German Internet users (N = 2,691). We investigated what distinguishes users who intervene against hate speech, focusing on associations between citizens’ prior counteractions and their personal political characteristics, their attributed responsibility for intervening against hate speech to social and political actors, and their institutional trust. Results indicate that especially Internet users’ personal political characteristics (e.g., internal political efficacy, political opinion leadership) as well as trust in regulative political institutions are positively associated with counteracting against online hate speech. While social media use and previous experience with counteractions increased the likelihood of users counteracting against hate speech, authoritarian attitudes and attributing responsibility for intervening to platform operators decreased it.