What is XBuild?
XBuild operates as a specialized AI platform designed to streamline the complex estimating workflows inherent in the construction industry. By automating the generation of professional proposals, the platform enables contractors to significantly reduce manual labor hours while simultaneously increasing the accuracy of their bids. Key features, such as the Insurance Estimation Copilot and specialized roofing proposal modules, position XBuild as a central source of truth for both contractors and homeowners. This focus on transparency and speed allows firms to scale their operations, reduce overhead costs, and respond to market opportunities with unprecedented agility.
How much funding has XBuild raised?
XBuild has raised a total of $24.5M across 2 funding rounds:
Angel/Seed
$5.5M
Series A
$19M
Angel/Seed (2021): $5.5M with participation from Andreessen Horowitz
Series A (2026): $19M led by Rackhouse Ventures and Andreessen Horowitz
Key Investors in XBuild
Rackhouse Ventures
Rackhouse Venture Capital is an early-stage venture capital management firm that specializes in supporting founders and companies at the intersection of artificial intelligence and machine learning with real-world applications.
Andreessen Horowitz
Founded in 2009, Andreessen Horowitz is a private American venture capital firm that invests in both early-stage start-ups and established growth companies.
What's next for XBuild?
With the successful closure of this major enterprise-level funding, XBuild is strategically positioned to scale its product offerings and expand its market footprint. The company is expected to prioritize the enhancement of its AI-driven estimation engine, potentially integrating deeper predictive analytics to further assist contractors in winning bids. Furthermore, the capital will likely support the expansion of its subscription-based service model, allowing XBuild to capture a larger share of the roofing and general contracting market. As the firm continues to refine its technological infrastructure, it remains well-positioned to lead the digital transformation of the construction sector, setting a new standard for efficiency and professional proposal management.
See full XBuild company page
