Publication metadata The Hydrogen Valley platform is a global collaboration platform that promotes the development of integrated hydrogen projects and raises awareness of their role in the evolving and growing clean hydrogen sector among policy makers, industry and other stakeholders. It provides information on hydrogen flagship projects and serves as a hub for the most advanced Hydrogen Valleys worldwide. Having originated in Europe, the concept of Hydrogen Valleys has now gained global interest, with many regions developing similar projects. Today, nearly 100 Hydrogen Valleys globally are represented on the platform. The www.h2v.eu platform supports the Mission Innovation 2.0’s goal of reaching 100 Hydrogen Valleys worldwide by 2030 and contributes to the Clean Hydrogen Mission’s objective of reducing end-to-end costs of clean hydrogen by 2030. This report investigates the state of the clean hydrogen sector by analysing empirical evidence from Hydrogen Valleys globally over the last three years. The report discusses the development of the Hydrogen Valley concept and community as well as the necessary framework conditions for its development.