The European Diamond Capacity Hub (EDCH) is a collective designed to strengthen the Diamond Open Access (OA) community in Europe. It offers open, FAIR-aligned services, tools and best practices through a dedicated online platform, providing targeted support, training, and networking opportunities to Diamond OA community members. Diamond Discovery Hub (DDH): An authoritative index of Diamond OA journals helping authors, libraries, funders, and research assessment bodies identify trustworthy journals.Diamond Open Access Standard and self-assessment tools: A quality assurance framework to assess compliance with best practices.Publishing tools: A set of tools and add-ons to optimise publishing workflows, improve content management, and uphold editorial quality.Registry and Forum: A registry of Diamond OA publishers, service and tools and technology providers and a forum for collaboration and shared solutions to promote integrity and transparency in scholarly publishing.Resources & Guidelines: A comprehensive set of materials supporting publishers transitioning to Diamond OA, including best practices and sustainability.Training Platform: Targeted learning modules that equip editors and publishers with the knowledge to implement best publishing practices and maintain research integrity. The EDCH promotes equity, integrity and transparency in scholarly publishing, ensuring that high-quality research remains accessible and sustainable for all.