Although in the recent years there has been an increase of SaaS (Software as a Service) applications providing the new opportunities, we still face the integration challenges that have been known in the world of local, siloed applications. The main reason for integration problems is the insufficient mechanisms for integration of SaaS applications that are conceptually different from local applications. As the use of SaaS applications grows the need for efficient and robust integration approach is becoming obvious. In our presentation, we will present the requirements for the realization of SaaS integration and how the IPaaS (Integration Platform as a Service) addresses integration challenges in the cloud. We will also present today’s innovative IPaaS solutions and how could next-generation SaaS integration look like in the future.