The platform for buying, selling and managing residential construction We are building the Amazon of construction where contractors can give their customers an interactive shopping experience, turning the estimate into a point-of-sale, for the first time. Now, instead of signing a vague PDF estimate without even knowing what they’re getting, customers can upgrade things like their counters, faucets or floor, and add or remove optional components like a guest bathroom, fireplace, or deck -- and see the effect on the price instantly before approving.