The 4APIs project funded by Business Finland. The role of software and data becomes increasingly important for future competitive advantages. Application Programming Interfaces (API) and their utilization as a platform enabling technology are the keys in the transition from SaaS model to platform thinking. Succeeding in such new technological and business environments requires fundamental developments taking into account and shaping the new rules of the systems and players. In our vision, the key areas are API design principles, complex systems development competencies, and ecosystem creation and management capabilities.