The Biodiversity Toolbox of the NetBiome-CSA network—a partnership for research and sustainable management of (sub)tropical biodiversity in European Overseas Regions (ORs) & Territories (OCTs)—provides a database of stakeholders in biodiversity management and research, including areas of expertise, interests and activities. Also provided are biodiversity valuation case studies relevant to OR/OCTs and a list of training and communication materials on biodiversity valuation with links to the original sources. Other resources include good biodiversity conservation practices and finally, a dedicated communication forum for registered stakeholders, for targeted queries or discussions, to develop projects or seek partners for collaboration.