Constor

Not yet independently verified. Dated from the Y Combinator launch post of 13 November 2026; the maker's site gives no launch date, pricing or company location, and the time savings and testimonials are the maker's own. We will update this when it can be confirmed, and remove this note.

Reading quantities off a set of construction drawings is slow work: the founders of Constor put it at about an hour per drawing, or roughly 50 hours for a project of 50 drawings. Constor, a Y Combinator company, sets out to turn that into minutes, starting with takeoffs and estimates for subcontractors and general contractors.

From plan PDF to quantities

The maker's site describes a short route. A user uploads the plan PDF directly, with no conversion or plugin. The software detects elements and extracts quantities, and the examples shown cover HVAC networks, piping, ducts, surfaces and equipment. The site says takeoffs for 1, 10 or 50 plans take under 30 minutes.

Checking the result

Before anything is used, the user reviews the takeoff against the plans and adjusts it. Constor then builds a 3D view of the systems that can be rotated and inspected, and the takeoff can be exported as a structured table for a quote or an ERP system. The launch post adds that it connects to price sources to build an estimate.

Trade contractors on the site

Five owners of insulation businesses are quoted on the site, with names and company names given, saying takeoffs now take minutes rather than hours. The site is offered in French, English, Portuguese and Chinese. These quotes are the maker's own testimonials.

Beyond takeoffs

The founders call Constor an operating system for construction and list further steps: bid preparation and submission for subcontractors, offer comparison and blueprint revision coordination for general contractors, and current pricing and order fulfilment for suppliers. Louis Pires grew up in a family HVAC business, Elio is a former ETH Zurich researcher and Dany a former Adobe sales professional. They met at a hacker house in San Francisco that they started.

Key facts

Maker: Constor Founders: Louis Pires, Elio and Dany Launched: Y Combinator launch post, 13 November 2026 Product: Constor, AI takeoff and estimating from drawings Pricing: not published; a free 20-minute live demo is offered Backed by: Y Combinator