This book constitutes revised selected papers from the 15th International Global Sourcing Workshop 2025, held in Obergurgl, Austria, in March 2025. Following an introductory chapter by the volume editors, the 9 full papers included in this book were carefully reviewed and selected from 20 submissions. The book offers a review of the key topics that bridge the sourcing, digital platforms and ecosystems literatures, populated with practical frameworks that serve as a tool kit to managers and students. The range of topics covered in this book is wide and diverse, offering various perspectives on digital platforms, ecosystems and sourcing from both behavioural and design perspectives. More specifically the book sheds light on how sourcing decisions and digital platforms interact, their relevance for innovation and the governance of digital technologies in ecosystem settings. This book is a must read for any researcher and manager whose interest is in advancing knowledge sourcing, platforms and ecosystems.