Compare China sourcing routes.
When self-service marketplaces can work
Marketplaces can be useful when the part is simple, the buyer can judge supplier fit, and the requirement is already clear enough for factories to quote on the same basis.
Where sourcing agents and trading companies fit
Agents and trading companies can add local communication, supplier access and follow-up capacity. Buyers still need to know who makes the goods, which evidence supports the quote, and where responsibility sits.
Where inspection and freight specialists fit
Inspection providers, freight forwarders and customs brokers are useful specialists at defined stages. They usually work from the scope, shipment facts and documents they are given.
Where it can work
What they do not solve
When UK local manufacturing is still the better route
UK local manufacturing can be the stronger route when speed, engineering iteration, direct inspection, IP sensitivity, regulatory exposure or low quantities matter more than overseas unit-price comparison.
When internal procurement can handle it
An internal team may be enough when the product is well specified, suppliers are known, quality history is stable and the team has time to manage evidence, samples, payment gates and shipment decisions.
Where Plinth&Co fits
Plinth&Co fits where the buyer needs a decision file before the next commitment: RFQ pack, supplier evidence, quote comparison, sample gate, inspection scope and provisional landed-cost view.