Policymakers in the European Union embrace collaborations of businesses, governments, and academia to develop a sustainable and circular bioeconomy. These so-called Triple Helix clusters aim to stimulate innovation and learning. However, Triple Helix collaborators also face conflicting perspectives on the desirability and directionality of the bioeconomy transition, either within a cluster or with societal actors affected by a cluster’s innovations. While previous Triple Helix research focussed on how to broaden the cluster collaboration towards a more inclusive range of actors to handle such contestations, we study how cluster partners deal with uninvited input from societal actors that do not form part of a cluster. We conceptualize this input as societal back talk and distinguish organizational hearing, listening, and learning capabilities to explore how back talk contributes to innovation in three bioeconomy clusters in the Netherlands, Germany, and Ireland. Our qualitative case study analysis is based on interview transcripts, newspaper articles, and policy and planning documents. Results indicate that collaborating partners generally do not hear uninvited back talk that fundamentally challenges their tacit beliefs, because partners focus on informing the public about what they consider techno-economic benefits of their projects. As a consequence, collaborators become ‘insiders’, which hinders listening to divergent problem definitions and alternative solutions of ‘outsiders’. Learning from uninvited back talk is therefore restricted to minor adjustments. To avoid innovative solutions remaining unexplored as a result of this discursive lock-in, Triple Helix collaborators must engage in hearing and listening to critical societal actors by establishing a reflective, two-directional dialogue.