<p>Leaders’ support for employee voice is often assumed to encourage employees to speak up and share their ideas or suggestions rather than remain silent. However, existing research primarily focuses on how managerial support for voice leads to increased voice behavior and overlooks its impact on silence. As silence is not merely the absence of voice but a distinct construct, evidence linking managerial support for voice to more voice is insufficient to conclude that it reduces silence. In this paper, we examine how and when advantageous voice endorsement–employees’ perception of receiving greater managerial support for their voiced ideas or suggestions compared to their coworkers–paradoxically increases subsequent silence. Drawing upon the <i>sensitivity about being the target of a threatening upward comparison</i> (STTUC) model, we argue that employees with advantageous voice endorsement experience heightened concern about being envied, which in turn leads to more silence. Furthermore, the positive indirect effect of advantageous voice endorsement on silence via concern about being envied intensifies for employees with higher levels of superficial harmony. Across one preregistered experiment and three multi-wave field studies, we found consistent support for our hypothesized relationships and ruled out several alternative mechanisms.</p>