Manufacturing is the production itself
Manufacturing refers to the actual making of furniture — cutting, assembling, finishing — carried out by a factory. A manufacturer's core business is production capability, not finding you the right supplier or managing your specific order end-to-end.
Sourcing is finding, managing and verifying that production on your behalf
Sourcing sits a layer above manufacturing — identifying the right manufacturer for your needs, negotiating on your behalf, and managing quality and logistics around their production. A sourcing service doesn't manufacture anything itself; it manages the relationship with factories that do.
Why the distinction matters when searching for help
A buyer looking for "a furniture manufacturer" is looking for a single factory to produce a specific product. A buyer looking for "furniture sourcing" usually needs help navigating multiple possible factories, vetting them, and managing the process — a meaningfully different service, even though both terms show up in similar searches.
Which one you are actually buying
The confusion has a practical consequence, because the two lead to different contracts. If you are buying a manufacturing service, what you need is a factory that already makes that product, a clear technical specification, tooling where the design needs it, and quality measured against your drawing. If you are buying a sourcing service, what you need is someone who can identify the right factory, negotiate with it, hold it to the specification, and take responsibility when it falls short. The first is a production relationship and the second is a purchasing one, and the difference shows up in who carries the risk when something goes wrong.
Where the two are often sold as one
Most buyers buy both without setting out to. A sourcing agent who finds you a factory is doing the first half of sourcing and the beginning of manufacturing, and from that point the factory takes over production while the agent steps back unless someone is holding them to it. This is where projects go wrong quietly: the goods exist, the factory was chosen, and nobody is accountable for the gap between what was ordered and what arrived.
If you are commissioning a genuinely new product, manufacturing is the harder half and should be identified as the project in its own right — requiring drawings, prototypes, tooling decisions and possibly compliance testing, all of which happen before anyone thinks about freight. If you are buying an existing design in an established category, sourcing is most of the work and manufacturing is largely routine. Naming which one you are doing makes the effort and the risk much easier to scope.