AbstractThe prevailing view that authoritarian regimes primarily respond to threats of instability is challenged by our research, which posits that such regimes also take citizen complaints seriously, even when they do not pose a direct threat. Based on 238,835 citizen claims from China's largest national online petition platform from 2020 to 2021 and 793,119 citizen claims from Wuhan's local petition website, this study reveals that online complaints result in greater governmental responsiveness, compared to non‐complaints. This institutionalized feedback mechanism is driven by a mix of factors: the upper‐level officials' expectation for negative feedback, combined with bureaucrats' efforts to preserve themselves and avoid punitive consequences. Our findings thus enhance the understanding of what drives authoritarian responsiveness and signal a caution that an overreliance on managing complaints may deepen a stability‐maintenance mechanism, potentially impeding substantial reform.