AI-automated drawing QA for MEP firms

Find and flag errors before your drawings make it to the field.

Your senior engineers spend hours every week red-lining PDFs for missing keynotes, schedule mismatches, and coordination gaps. If a senior engineer spends just 10% of their time on drawing QA, that's the equivalent of $40–50K a year in billable capacity. RedMark scans your full drawing set and flags the errors before a senior engineer ever opens the file.

Your AI checks the documentation. Your engineers check the engineering.

RedMark comparing a mechanical schedule against the panel schedule — RTU-1 reads MOCP 150 on the panel schedule and 100 on the mechanical schedule. View full size
Built by engineers who worked at

The Redline Tax is killing your margin — and most MEP firms have never quantified it.

And it gets worse — coordination gaps cause downstream rework, RFIs, and the dreaded Million Dollar Typo.

$45,000
Per senior engineer, per year, spent on manual drawing QA.
10%
Of a senior engineer's week typically spent manually QA-ing drawings.
15–20%
Of senior margin lost to non-billable administrative cleanup.
Based on a 100-engineer firm, $200/hr billable rate, 4.5 hrs/week of senior QA time — 10% of a 45-hour week.
How it works

From upload to redlined drawings in under an hour.

01

Upload

Drag and drop your full mechanical, electrical, and P&ID drawing sets — plans, schedules, legends, submittals. No CAD plugin, no Revit integration.

02

AI scans every sheet

Custom OCR + computer vision trained on tens of thousands of M&E drawings + a reasoning layer encoded with engineering rules. Cross-checks plans against schedules, electrical against mechanical.

03

Issues redmarked

Provides an issues list and marked-up drawings. The issues list exports to Excel, and the drawings come back as PDFs with the markups on them.

QA check library

30+ automated checks across mechanical, electrical, plumbing, and P&ID.

A sample below — filter the full library on the product page.

Coordination

Equipment schedule coordination

Verifies equipment on the plan exists on the schedules — and vice versa.

Coordination

Mechanical–electrical coordination

Catches circuit sizes and voltage mismatches between mechanical equipment and electrical panel schedules.

Coordination

Equipment power coordination

Every piece of mechanical equipment that needs power must appear on the electrical power plan.

Text & annotation

Keyed note check

Flags keyed notes on the plan missing from the list — and notes on the list that appear nowhere on the drawing.

P&ID

Instrument tag coverage

Every instrument tag on the P&ID must have a complete entry in the instrument list.

Architectural Coming soon

Door hardware coordination

Matches hardware sets in the door schedule against the sets called out in the specification.

See the full check library
In the field

Tested on live projects — not demo sets.

Shipping cadence
New checks weekly
v1 shipped March 2026. The check library grows every week, driven by what engineers in the field ask for.
Engineering-rule checks
Calculated, not guessed
RedMark recalculates values from first principles — heater sizes from airflow and ΔT, MOCP against panel schedules — and flags numbers that don't compute.
Who it's for

Built for the people doing the work — and the people protecting the margin.

Principal · Owner · VP Engineering

Recover 15–20% of senior margin lost to manual QA. Reduce RFI exposure and Million Dollar Typo risk. Enable greater efficiency with existing staff.

Get the ROI breakdown

BIM Manager · CAD Manager

Standardise QA across every project. PDF-native — nothing to install and no change to how your engineers already work. Catch coordination errors before submittal.

See the platform

Senior · Lead Engineer

Stop manually finding every piece of equipment and keyed note, and prevent your eyes from glazing over after an hour of QA. Spend your time engineering.

Get a free drawing audit
Security

Your IP stays your IP.

AES-256 encryption at rest. TLS 1.3 in transit. Only minimal, context-free metadata is ever sent to an LLM — your drawings, title blocks, company names, and project details are never transmitted. Enterprise deployments with contractual no-training guarantees.

Read our security model
AES-256 at rest TLS 1.3 in transit No model training SOC 2 Type II — in progress GDPR-ready
The team

Built by engineers who have lived the Redline Tax.

AV

Arvind Viswanath, PE

Founder

25+ years across MEP and manufacturing. 3M. National Laboratories. Hundreds of complex projects.

KS

Shrikrishna Srinivasan

CTO

20 years building production AI. Texas Instruments. AutonomIQ (acquired by Sauce Labs).

SG

Sundeep Goel

Advisor & Investor

30+ years in enterprise SaaS. Procore. NetSuite. Object Design. Lombardi.

Read the full team story
Start here

See it on your own drawings.

Upload 5 sheets from a recent project. We'll return a RedMark Report inside 48 hours showing exactly what your manual QA missed. Free, no obligation.