Business management Paradigm is Changing. We used to have big, best, and fast and now it seems that we are having one more paradigm of “Open”. Chesbrough (2003) argued for cooperating between competitors or allies in his article “The era of open innovation”. (ChesbroughH.W, 2003) This research is about open innovation with customer participation. Many organizations built platform to motivate customers to participate the product development process. Hence, we selected three different types of platforms which are full-open, semi-open and closed platform for case study. To compare different perspective from organizations and customers, we will use both of case study of the organizations who opened competencies to the customers and survey of the customers who are creating derivative products. From that case-study and survey result, we aim to figure out what to open and what to close for the organizations that are implementing open innovation strategy. We will suggest a competency pyramid model that helps organizations to divide their competencies into two different sectors: open competency and closed competency. And finally, we will find out what factors are important to make a platform successful.