E-commerce has emerged as a key driver of regional economic transformation, especially in metropolitan cities like Mumbai. This study investigates how digital trade and online platforms have reshaped the city’s commercial landscape, enabling small and medium enterprises (SMEs) to reach broader markets and contribute to local economic growth. Historically, Mumbai has been a hub of traditional commerce, but with technological advancements, the shift toward e-commerce has redefined business strategies and consumer interactions. The research adopts a historical and technological lens to understand the transition from conventional trade systems to digital ecosystems. It highlights the evolution of Mumbai’s economy through the integration of technology, logistics networks, and digital payment systems that collectively promote inclusive economic development. The study also evaluates how these changes influence employment, entrepreneurship, and revenue generation across sectors. Findings suggest that e-commerce plays a pivotal role in decentralizing economic opportunities by connecting regional producers with national and global consumers. The paper concludes that the continuous integration of advanced technologies, such as AI-driven analytics and digital marketing, will further strengthen Mumbai’s position as a major e-commerce and economic hub in India.