Marapone Blueprint Auditor
Takeoff, code review and tender risk, off the drawings.
In partnership with Marapone. Built with the Marapone team, whose estimators defined what a useful audit actually looks like and tested every release against live tenders.
Visit the product page- What we did
- Product design, vision pipeline, desktop + mobile build — with Marapone
- Timeframe
- 2025 — 2026
- Discipline
- App
- Status
- Released · 2026
A set of drawings holds everything you need to price a job and every reason you might lose money on it. Reading it properly takes a senior estimator days, and the things that hurt — a detail that contradicts the spec, a quantity nobody carried, a clause in the tender that shifts risk onto you — are exactly the ones that get missed at 11pm before a close.
The Blueprint Auditor reads the set instead. It measures, it cross-checks against the Ontario Building Code, and it says plainly what it found and where — page, detail, clause.
- 8
- Audit tools in one pass
- 100%
- On-device — drawings never leave
- 0
- Per-drawing or per-seat fees
01
Reading a drawing, not scraping a PDF
Construction drawings defeat generic document AI. Scale lives in a title block, meaning lives in line weight and hatch, and half the information is in details referenced from somewhere else in the set.
The pipeline handles the set as a set: it resolves scale, follows detail callouts, and keeps every measurement anchored to the sheet it came from — so a number you don't trust is always one click from the drawing that produced it.
02
Eight tools, one pass
Takeoff, code review, tender-risk scanning, RFI backlog triage, scope-gap finding, change-order risk, deficiency lists and meeting-minute tracking. Each one is a distinct question a project team asks of the same set of documents.
Running them together is the point. A scope gap is only interesting next to the quantity that should have covered it, and a tender clause only matters when you can see the drawing it applies to.
03
Owned, not rented
It runs on the estimator's own machine, on the MaraponeAI engine. Drawings — often the most commercially sensitive documents a contractor holds — never leave the office, and there is no per-drawing charge that makes people ration the tool they bought.
In motion
The app, running
Inside the product
The tools
Built with
Python, PyQt6, MaraponeAI, On-device OCR, macOS + Windows
More applications from the lab
Taking one new project for Q4 2026
Have something worth building?
A game, an app, an AI model, or a problem that doesn't have a name yet — tell us about it and we'll build the prototype.