Abstract: In the first quarter of the 21st century, the systemic digitalization of all structural subsystems of the global economy, along with the rapid advancement of information and communication technologies and digital media tools, has exerted a profound transformational impact on the nature of international politico-economic relations and the diplomatic activities of the countries. These processes have significantly accelerated the evolution of the global digital environment through the dynamic development of social networks, internet services, blogging platforms, photo and video hosting services, geolocation tools, content aggregators, and online forums, thereby contributing to the deep qualitative transformation of traditional diplomatic practices. This transformation is most clearly manifested in the shift from a linear (traditional) model of digital diplomacy — typical of the late 2000s — to an algorithmic model in the second half of the 2010s, followed by the emergence of a datafied model of digital diplomacy in the 2020s. The article explores the conceptual essence of digital diplomacy, its tools, characteristics, and the transformational changes driven by the systemic digitalization of the global politico-economic space. A comprehensive analysis of the datafied model of digital diplomacy is provided, and the system-forming impact of digital media technologies on diplomatic practices and the economic domain is substantiated. It is demonstrated that, despite the continued relevance of traditional diplomatic instruments in promoting national interests on the international stage, digital media technologies are increasingly functioning as the dominant mechanism of diplomatic engagement. It is asserted that the digitalization of diplomatic activity serves as the primary driving force behind the formation of expansive, flexible, and network-organized national diplomatic ecosystems within the global context. These ecosystems are characterized, on the one hand, by deep and multifaceted cooperation between diplomats and a wide range of stakeholders, and on the other hand, by the involvement of numerous actors and institutions that are not governed by conventional vertical-hierarchical management models. It is argued that contemporary digital technologies are laying the foundations for a fundamentally new landscape of economic diplomacy, opening up qualitatively new technological opportunities for the operations of Ministries of foreign affairs and permanent diplomatic missions abroad, supporting and developing interstate economic relations with host countries, and protecting the economic interests of accrediting countries, their citizens, and business entities.