The Diamond Discovery Hub (DDH), a result of the CRAFT-OA project, aims to strengthen Diamond Open Access (OA) publishing in the non-profit sector, focusing on public or institutional journals, platforms, and services operated by academics and research performing institutions. It provides free, sustainable services to enhance the visibility and recognition of Diamond OA journals. DDH will serve as a hub, offering a collection of Diamond Journals and distributing metadata to aggregators without charging indexing fees. Inclusion in the DDH requires compliance with established criteria, which define the necessary standards for a journal to be recognized as Diamond.