Drawings in. Numbers out. Your estimator in charge.
Every job starts with the same question — what will this cost? — and answering it well has always meant hours of a senior estimator’s time — or days of waiting on an outside service. Blackfrog’s costing platform changes the speed, not the standard: AI reads the drawings and documents, deterministic code does the measuring and the math, and your estimator reviews and approves every line before a number goes out the door. Accurate, faster, and easy enough to use that it actually gets used. Product costing or job costing, residential or commercial — the discipline is the same.
The takeoff that used to wait a week.
A high-end residential painting contractor came to us with a familiar bottleneck: every bid on a luxury home started with a takeoff, and the takeoff meant sending the drawing set out and waiting five to seven days for quantities to come back. We built a system that reads the full architectural set — floor plans, finish schedules, fixture counts — and returns per-room takeoff quantities the estimator reviews, edits, and prices. On a 47-page set for a roughly 37,000-square-foot residence, the largest scope item landed within about 1% of the estimator’s own manual takeoff — and when the estimator priced it, the system reproduced their own interior bid to 97.5%. That’s the Mirror Test — before anyone trusted the system with a new bid, it had to hand the estimator back numbers they already knew were true. Never confuse the machine being impressive with the machine being right; this platform was built around that rule. The week of waiting is gone. The judgment never left the building.
formerly a 5–7 day outsourced wait
interior bid, reproduced
A defensible budget while the deal is still warm.
For a commercial general contractor in the Mid-Atlantic, the cost of a credible early budget — hours of senior-estimator time per inquiry — forced a bad choice: turn early-stage deals away, or burn expert hours on projects that might never close. Now the drawings go in and a full line-item budget comes out, priced across all 21 CSI divisions on every run. The rates aren’t from a published cost book — they’re rate tables built from the estimator’s own historical bids, then benchmarked against a market range so an off-the-rails number never goes out looking authoritative. Two modes cover the whole conversation: a detailed proposal for bidding, and a clearly-labeled feasibility band for the first phone call.
used to take the better part of a day
six sealed bids on the calibrated sector
The AI is the first guess. Your estimator is the last word.
Upload the drawings.
Floor plans, finish schedules — full sets, multiple sheets at once, full resolution. No downscaling, no pre-processing on your end.
The AI reads the plans and shows its work.
A vision model extracts the scope — areas, room and fixture counts, finish levels — and grades its own confidence on every field. Anything ambiguous is flagged for a person to confirm, not guessed at.
Your estimator confirms the scope.
Every field is editable, and nothing is priced until a person has reviewed what the machine read. The system amplifies your estimator’s judgment; it never bypasses it.
A calibrated engine prices the job.
Deterministic code prices the confirmed scope from rate tables built out of your own historical bids — then benchmarks the result against a market range so an outlier never leaves the building looking authoritative.
Both engagements on this page are real, paid client work — anonymized at each firm’s request, with every number documented in the engagement records, not projected. No staff displaced: on both, the estimator reviews every field the AI fills, and final pricing stays with the estimator’s judgment. Read the residential engagement → · Read the commercial engagement → · All case studies →
Your drawings already hold the number. Get it in minutes.
Bring a real drawing set — the last job you bid, or the one sitting on your desk right now. We’ll run it through the platform and put the output next to your own numbers, line by line, so you can judge it the way an estimator should: against the work.
How accurate is AI construction takeoff?
On a real 47-page architectural set, Blackfrog’s largest scope item landed within about 1% of the estimator’s own manual takeoff, and when that estimator priced the job the system reproduced their own interior bid to 97.5%. Accuracy isn’t assumed — it’s measured against numbers the estimator already trusted (the Mirror Test) before the system is used on anything new.
How long does an AI takeoff take?
About 15 minutes for a full 47-page set, versus the five to seven days that set previously waited in an outside takeoff service’s queue. The speed comes from the AI reading the whole drawing set at once; the standard doesn’t change, because your estimator still reviews and approves every line before it’s priced.
Can AI read a full architectural drawing set?
Yes — floor plans, finish schedules, and fixture counts, multiple full-resolution sheets at once. A vision model extracts the scope and grades its own confidence, so low-confidence reads are flagged for a person rather than hidden. It’s the reading and measuring no one should do by hand; the judgment stays with your estimator.
Does the estimator still control the bid?
Always. The AI produces the first guess; the estimator is the last word. Every extracted field is editable, nothing is priced until a person confirms the scope, and final pricing runs on a calibrated engine built from your own historical rates. No staff displaced — the estimator’s time moves from waiting on measurements to the pricing judgment that wins bids.
Can't ChatGPT just do estimating?
A general chatbot can sound impressive and still be wrong — and in estimating, wrong is expensive. Blackfrog is built around one rule: never confuse the machine being impressive with the machine being right. The AI does the reading; deterministic code does the math; your estimator verifies against ground truth. Impressive sells the demo; verified is what you can bank.
Painting contractors
The vertical page: a 47-page set to per-room quantities in under 15 minutes, and 97.5% reproduction of the estimator’s own priced bid.
How accurate is AI takeoff, really?
Our verified benchmark, with the method shown and the limits stated — including what the 2.5% means.
Comparing takeoff software?
An honest look at the tools in this category, including where they beat us and when to buy something else.
Commercial contractors
The vertical page: a plan set to a priced budget across all 21 CSI divisions in under two minutes, checked at −0.2% against six of the estimator’s own sealed bids.
Thinking about quoting automation?
Which parts of quoting can honestly be automated, which need a person, and the failure mode nobody warns you about.
Drawing to budget, explained
How a plan set becomes a defensible line-item budget — the method, written out, with the limits stated.
Practical AI for small and mid-sized business. Live products, verified numbers, and your experts in charge of every decision.