OpenTakeoff
Free, open-source PDF takeoff for construction and flooring estimating
...It runs entirely in your browser: no account, no upload, no server. Plans never leave your machine.
What makes it different is who can run it. A person clicks the canvas; an AI agent calls the identical engine over the Model Context Protocol (npx opentakeoff-mcp, 35 tools) and gets the identical number, with the scale and origin of every measurement recorded.
Built for Division 9 flooring by a working estimator, but the engine is general - drywall, paint, concrete, sitework.
A free alternative to subscription takeoff tools such as STACK, PlanSwift, Bluebeam, Kreo and Togal.