Prefably

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Prefably is an independent directory of factory-built home companies across all 50 US states, covering prefab, modular, manufactured, ADU, panelized, kit and tiny-home builders. It currently lists 2,291 companies.Listings are organised by state, because delivery radii, building codes and set-crew availability are all state-bound. Each profile shows location, service area, ratings where published, phone where available and a direct link to the company's own site, so buyers shortlist and call builders themselves.It is deliberately not a lead marketplace: inquiries are never auctioned or resold, listings are free for builders to claim, and there is no paid placement in the organic state lists. Alongside the directory it publishes buyer guides on modular costs, financing and FHA loans, a citable state-by-state research dataset, an open JSON API, and llms.txt files for AI agents.