Background: In recent years, there has been considerable interest in the philosophical concept of Open Banking and its practical implementation, often associated with digital platforms. The term ‘Open Banking platforms' has been used to describe the complex intersection between the two concepts of Open Banking and digital platforms, and it sometimes embody a series of challenges and opportunities. Open Banking aims to increase competition, innovation, and interoperability in the financial sector, creating opportunities for new players while challenging established banks to rethink their business models and value propositions. However, few researchers have addressed the question of challenges and opportunities faced by the various stakeholders involved in Open Banking platforms. Purpose: The purpose of this study is to investigate and deepen the understanding of the challenges and opportunities faced by various stakeholders involved in Open Banking platforms. Methodology: In this study, a qualitative methodology with an abductive approach was used, and the study was designed as a case study. The empirical data consists of seven semi-structured interviews conducted in 2023, as well as supplementary data from relevant documents. Thematic analysis and triangulation were employed to analyze the collected data. Conclusion: The complexity of Open Banking platforms becomes apparent during their practical implementation within the financial sector, involving technical, functional, interactional, relational, economic, and regulatory dimensions, as well as various stakeholders. On the one hand, third-party providers see opportunities for innovation. On the other hand, banks face issues with outdated IT infrastructure and threats to their existing business models. Some of the challenges arise due to varying perspectives and technological frames. This study also found that interest organizations play an important role in the design of Open Banking platforms, and regulatory requirements are therefore indirectly influenced by interest organizations. It is however challenging for stakeholders with limited resources to actively participate in the discussions about Open Banking. Additionally, a clearer dialogue and balance between compliance, security, and innovation is needed. Despite the challenges, Open Banking is considered important for the future but requires time to mature.