Single organizations encounter intricate challenges in meeting the UN’s Sustainable Development Goals (SDGs) on their own and thus are increasingly concerned with forming ecosystems. This is also the case in the e-commerce domain. It is assumed that particularly focal actors of such ecosystems...

Introduction -- Scientific Approach -- Conceptual Foundation -- Platform Types in E-Commerce Ecosystems -- Architecture of Platforms in E-Commerce -- Boundary Resources in E-Commerce Ecosystems -- Platforms as Orchestrators in E-Commerce Ecosystems -- Discussion -- Conclusion -- Bibliography.