Romania’s membership in the European Union and NATO has increased the visibility of think tanks as contributors to the country’s diplomatic and economic policy. These institutions connect academic research, public dialogue, and government decision-making by offering expertise that helps shape national strategies. Yet, their real influence on policy outcomes remains insufficiently explored. This paper presents a focused analysis of five major Romanian think tanks: the European Institute of Romania, the Romanian Diplomatic Institute, the New Strategy Center, the Romanian Center for European Policies, and EUROPULS. The research examines their structures, publications, engagement methods, and connections with public institutions. While each focus on a specific set of policy areas such as European integration, national security, or governance reform, they often rely on similar tools. These include publishing policy documents, participating in consultations, and contributing to public or institutional debates. However, the level of their influence varies, often depending on external factors such as their funding sources, the strength of their institutional networks, and the transparency of their operations. By highlighting both their roles and limitations, the study offers insight into how think tanks contribute to the shaping of Romania’s policy agenda. It also opens space for further research into how knowledge-based institutions can support democratic governance and informed decision-making in transitional political contexts.