Structured AI builds AI agents for construction design engineering that automate quality assurance and quality control on technical documents and drawings. The platform learns client standards, applies building codes, and automatically reviews drawings to reduce design clashes, inconsistencies, and costly requests for information and change orders. The system can check 100-page blueprints against 2,000+ pages of building codes in minutes and detect cross-trade inconsistencies across documents, drawings, and Revit models. Structured AI is part of Y Combinator's Fall 2025 batch and is based in New York.