The way people move is evolving. The future will have flexible, integrated mobility and on-demand services. The paradigm shift towards door-to-door travel provides opportunities for a new class of market entrants: mobility integrators (MIs). This study examines this emerging market space and features a wide spectrum of visionary opportunities for MIs. It opens with market definitions and an ecosystem before outlining the Mega Trends that are driving market growth. It provides different business models, customer types, and technology solutions. After explaining mobility budgets, it details case studies of existing MIs. It closes with potential cities where mobility integration would excel and three big predictions for the market's future.