Following the dissolution of the Soviet Union in 1991, Russia pursued various strategies to maintain influence within its near abroad. Several post-Soviet institutions emerged against a backdrop of evolving relations with the West and the rise of integrationist concepts like Neo-Eurasianism, which emphasizes regional cooperation and a distinct identity. The Eurasian Economic Union (EAEU), established in 2015 by Russia, Kazakhstan, Belarus, Armenia, and Kyrgyzstan, is a key initiative designed to foster deep economic integration, partially inspired by the European Union model. This article investigates the integration trajectory of the EAEU between 2015 and 2022, addressing the question: What were the primary trends and dynamics shaping the EAEU's integration path during this period? Employing the analytical frameworks of Neo-Functionalism and Neoliberal Institutionalism, the research finds that the EAEU achieved notable success in building institutions, developing common regulations, and establishing standards, aligning with Neo-Functionalist expectations of progress in formal structures. However, progress in practical economic integration—a core focus analyzed through the lens of Neoliberal Institutionalism's emphasis on achieving cooperative gains—lagged significantly. Specifically, the establishment of a fully operational common market, the consistent application of common external customs tariffs, and the implementation of coordinated economic policies experienced considerable delays during the period studied.