This study explores the sharing economy through the lens of service ecosystem theory, focusing on how resource integration and value co-creation enhance competitiveness. Using a conceptual framework and case study analysis of platforms like Airbnb and Uber, the research examines the systemic interactions among actors within these ecosystems. The findings highlight the dual role of these platforms as drivers of innovation and instruments of platform capitalism. Practical and theoretical contributions include strategies for fostering resilience and sustainability in dynamic market environments.