SAM.gov
— US Federal
Published opportunity data for US federal procurement, updated daily. Combined with DLA DIBBS for item-level supply demand and RFQs.
DLA DIBBS
— US Defense
The Defense Logistics Agency Internet Bid Board System — RFQs for items of supply, RFPs, IFBs, awards and procurement information.
UK MOD
— Defence Sourcing
The Defence Sourcing Portal hosts MOD requirements; Find a Tender and Contracts Finder cover UK public-sector and defence-adjacent routes.
UNGM
— UN Procurement
The UN Global Marketplace — humanitarian, medical, logistics, infrastructure, food, water, energy, vehicles and institutional supply categories.
NATO NSPA
— Multinational
The NATO Support and Procurement Agency — eProcurement and future business opportunities for support, logistics, equipment and infrastructure.
EU TED
— European Union
Tenders Electronic Daily — the EU portal for public procurement notices, useful for broader European demand mapping and recurring categories.