Anthony R. O’Donnell // January 20, 2026 
(Image source: XBuild homepage.)
XBuild (San Francisco) has raised $19 million in Series A funding to expand its AI-native estimating platform for contractors and insurers. The round was led by N47, with participation from Rackhouse Ventures and Andreessen Horowitz.
Matthew Cowan, General Partner, N47.
The startup launched in 2025 with an insurance-focused estimating tool and says it has since processed more than 15,000 completed projects representing $250 million in construction volume. Its initial product, which helps contractors generate