Initiatives like CRAFT-OA and DIAMAS aim to enhance Open Access Diamond Journals’ (OADJs) capacities through digital solutions, yet the technological landscape remains heterogeneous. This deliverable conducts a gap analysis, assessing the alignment of OADJs with recommended technical best practices outlined in the Report on standards for best publishing practices and basic technical requirements in the light of FAIR principles (Armengou et al., 2023). The analysis employs a versatile approach, combining quantitative analysis of various datasets and desk research on studies and reports. Case studies of European platforms further enrich the evaluation. The assessment identifies technical gaps and successes and lacks a comprehensive OADJs registry that the CRAFT-OA project will address through solutions like the Diamond Discovery Hub. This deliverable is currently under review by the EC.