Subtillis is the AI partner for licensed architects and professional engineers. It reviews the set, checks against code, and defends it through construction. Built for AEC firms, Subtillis catches cross-sheet conflicts, spec mismatches, and code issues before drawings are stamped, then helps teams answer RFIs and check submittals once the project is in the field. Fewer errors reaching the field means fewer design-caused change orders, protected fees, and stronger client relationships.