This note provides an overview of real estate iBuying, or instant buying, a business model that involves buying homes and then reselling them at a profit. Introduced in the mid-2010s, iBuying streamlined the process of selling a home by offering instant, all-cash offers to sellers. This note includes context on the traditional home buying and selling processes, the impact of property technology (PropTech), the iBuying process and unit economics, and the iBuying market landscape (e.g., top players and geographic markets).