Digital ecosystem governance entails the management of complex, dynamic power relationships. As entrant platform providers seek to cultivate an ecosystem, they must carefully navigate these power relationships when dealing with governance tensions. Providers generally seek to leverage the ecosystem's generative potential by facilitating a variety of interactions and distributing design rights. Simultaneously, they need to ensure stability and order by imposing rules that resolve contentious matters and restrict system participants' degrees of freedom. This study explores how and why providers can induce ecosystem actors to engage in collaborative negotiation regarding such governance tensions through a case study of the introduction of an open data platform in the Swedish public transport sector. Our analysis offers three main contributions. First, it provides an empirical demonstration that entrepreneurial threats, as well as opportunities, can trigger platform launches and drive collaborative negotiation of digital ecosystem governance. Second, it extends conceptualizations of boundary resources beyond the current focus on transactional elements by demonstrating the role of interactive boundary resources in the negotiation of governance grounded in both social and systemic power relationships.Third, it shows how positive reinforcement can complement punitive measures to increase acceptance of design rules.