CostLogic is an AI-powered browser-based platform for construction professionals that handles takeoffs, estimates, and invoices in a single connected workflow. Users can upload construction PDFs, calibrate scale, and measure linear, area, count, and angle quantities directly on the drawing. The built-in AI assistant, Onyx, can auto-detect rooms, draft estimates with markup and tax, and generate invoices from approved estimates. CostLogic eliminates manual data re-entry by flowing takeoff measurements directly into line items and converting accepted estimates into branded PDF invoices with one click.