Abstract: Citizen voice is increasingly solicited in government. Downstream citizen voice, such as complaints, can reveal pressure points, diverse needs, and failures in complex service ecosystems. However, theory and evidence on how noisy, unstructured citizen voice is mediated into policy and service arenas remain limited. Addressing this gap, this study examines ombud institutions and related actors that bridge citizen–state boundaries and policy networks. We use a qualitative approach to elaborate the concept of citizen voice mediation and to explore what strategies ombuds use to mediate downstream voice and what drives these choices. Findings from interpretivist analysis of documents and interviews in Italy, the U.K., and Argentina identify three outward mediation repertoires, authoritative-targeted, facilitative-collectivizing, and making information accessible and meaningful, which manifest in directive (AR), hybrid (IT), and curatorial (U.K.) country profiles. These strategies emerge from different forms of ecosystemic fragmentation and actor capacities. The study theorizes citizen voice mediation and derives propositions linking mediation strategies to patterns of fragmentation and actor capacity.