You just won a $4.2M school remodel.

180 pages of drawings. 6 disciplines.

Your pre-con team has 72 hours to review before the subcontractor deadline.

Your team finds 12 issues.

They miss 35.

$280K
in change orders
14
RFIs that should
never have happened
11 weeks
of schedule slip

All from errors that were sitting in the drawings before bid day.

Smarter Pre-Con. Better Outcomes.

BuildStackAI found all 47 in under 20 minutes.

BuildStackAI — Middle School Remodel
AI ReviewHistory
SHEETS 47
A-101 Floor Plan
A-102 Reflected Ceiling
A-201 Elevations
S-100 Foundation
M-101 HVAC Layout
E-100 Lighting Plan
P-100 Plumbing
OFFICE 101
CORRIDOR
24'-6"
Missing fire rating
Dimension conflict
Ref S-201 not found
ISSUES47 found
HIGHMissing fire rating at corridor wall assemblyA-101
HIGHCross-reference S-201 does not exist in setA-101
MEDDimension conflict: plan 24'-6" vs elevation 24'-0"A-101
LOWNote references "approved equal" without criteriaA-101
Missing fire rating Dimension conflict at grid B Ref S-201 not found Ambiguous "approved equal" Wall type mismatch at corridor MEP routing conflicts with structure No ADA path to exit Spec calls for Type X, drawing shows Type V Missing room finish tag Structural beam not shown on A-201 Missing fire rating Dimension conflict at grid B Ref S-201 not found Ambiguous "approved equal" Wall type mismatch at corridor MEP routing conflicts with structure No ADA path to exit Spec calls for Type X, drawing shows Type V Missing room finish tag Structural beam not shown on A-201

Same drawings. Different outcome.

Manual Review
Team3 reviewers
Time72 hours
Issues found12
Issues missed35
Cost of misses$280K+
vs
BuildStackAI
Team1 upload
Time20 minutes
Issues found47
Issues missed0
Cost of misses$0

You upload a PDF drawing set. BuildStackAI does the rest.

PDF
Upload
Vector PDF drawing set
A S M E P
Extract
Sheets organized by discipline
AI
Analyze
Vision review of every page, confidence-scored
2nd
Validate
Second-opinion filters false positives
X
Cross-Sheet
Cross-discipline coordination conflicts
SPEC
Reconcile
Spec vs drawing conflict detection
Issues tracker with full audit trail — export CSV, PDF, or share a live report via link

This isn't a new problem.

It's an expensive one.

The construction industry loses billions annually to drawing errors that were detectable before ground was broken.

$0B
lost annually to rework from drawing errors
0%
of RFIs were catchable in pre-con review
0x
cost multiplier: field fix vs. pre-bid catch
GC
General Contractors
Protect your margins. Catch drawing errors before they become change orders that eat your contingency.
SUB
Subcontractors
Know what you're actually bidding on. Surface missing information and coordination gaps before you commit a price.
A/E
Architects & Engineers
Catch it before the GC does. Run QA on your own set before it goes out for bid and avoid the embarrassing RFI.

Common questions

How accurate is it?
Every AI-generated finding goes through a second-opinion validation pass that filters false positives before anything surfaces. You also get a confidence score on every issue so you can prioritize your review. We're not replacing your reviewers — we're giving them a head start.
What file sizes can it handle?
We support vector PDF drawing sets up to 600 MB. Typical commercial sets (100–300 pages) process without issue.
Does it work for all disciplines?
Yes. BuildStackAI automatically identifies and organizes sheets by discipline — architectural, structural, mechanical, electrical, plumbing, civil, and landscape. Cross-sheet analysis then catches conflicts between disciplines that single-sheet reviews miss.
Can it check against project specs?
Upload your project specification alongside the drawings. BuildStackAI cross-references every finding against the spec — resolving issues the spec already addresses and flagging new conflicts between drawings and written requirements.

Stop finding these in the field.

We're onboarding a small group of teams for early access. Founder pricing locked for life.

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