REbuild is a technology-driven firm that has pioneered the 3D concrete printing (3DCP) market in Poland. They design and build large-scale automated printing systems that replace traditional masonry and formwork. By utilizing a "gantry" system, their machines move along three axes to deposit layers of a specialized concrete mix, essentially building walls directly from a digital CAD file.

The primary innovation is the REbuild 3D Printer, which allows for "freedom of form" - the ability to create curved and organic walls that would be prohibitively expensive with traditional methods. Their software optimizes material placement, meaning they only use concrete where it is structurally necessary, leading to a significant reduction in material waste and CO2 emissions.