This paper investigates the development of an open innovation platform in the furniture and furnishing industry, emphasizing the significance of digital sovereignty in digital platform design. The study involved various aspects, starting with the identification of stakeholders and their influences on the digital platform. Understanding the roles and interests of different stakeholders is crucial for designing effective governance mechanisms and ensuring inclusivity. Furthermore, an analysis of necessary extensions to existing business models was conducted. An input and output flow analysis elucidates knowledge generation and utilization. Clear requirements, including digital sovereignty, ensure data protection and privacy. The findings revealed that an Open Innovation platform can be conceptualized as a product-service system, combining the functionalities of a product with the administration and moderation services. This perspective facilitated a comprehensive understanding of the platform's interactions with stakeholders and allowed for the integration of digital sovereignty measures from the outset. The approach fosters stakeholder understanding and early integration of digital sovereignty measures and offers insights into designing digital platforms with digital sovereignty in focus. It emphasizes the need for early consideration and the link between research and commercial utilization.