International seminars and conferences have moved from the periphery of diplomatic life to its centre, becoming instruments through which states project soft power in an era of geostrategic transformation. Drawing on a qualitative, multi-method analysis of major international forums held between 2020 and 2024, this study examines how nations strategically leverage convening platforms to shape global narratives, cultivate alliances, and advance national interests beyond the reach of traditional hard-power instruments. Using case-study, comparative, and thematic analysis grounded in Nye’s soft-power theory and complex-interdependence and constructivist perspectives, the research identifies a qualitative shift in conference function. Contemporary forums operate as hybrid diplomatic–commercial platforms that integrate agenda-setting, convening power, thought leadership, and strategic signalling. The findings show that established powers use conferences to reinforce institutional leadership and norm-setting, whereas emerging powers tie convening strategies directly to economic integration, investment attraction, and national transformation agendas. Technological innovation—particularly the post-pandemic turn to hybrid formats—has both democratised participation and produced new digital hierarchies. The study concludes that the capacity to convene, moderate, and shape international discourse now constitutes a strategically consequential form of power, and it offers a weighted framework for assessing conference effectiveness as a soft-power instrument.