The AI platform for architects and engineers
Find the gaps faster.
Get back to the design.
QA/QC, RFIs, submittals, and project answers in one place.
Try it freeQA/QC Agent
The whole set. Checked at once.
Faster set review
Review engineering and architectural drawing sets about 20% faster.
Review hours back
Returned to the architects and engineers using Subtillis, for the design work that needs them.
Before the set goes out
Reconciling sheets is the slow part of every review. The QA/QC agent clears the mundane checks across disciplines and against the specification, so your team spends its review hours on the design.
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Same connection. Different sizes.
Confirm the connection size across both disciplines.
RFIs & Submittals
Respond to the field fast.
For an AI first-pass RFI draft
With the sheets and spec sections it cites.
Time saved per RFI
Average time to respond to complex RFIs by design teams.
After the set goes out
RFIs and submittals arrive months after the set is issued, when the project is no longer fresh. Subtillis drafts responses in minutes, grounded in your project documents, so your team answers the field quickly instead of spending hours getting reacquainted with the project.
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Which size governs at the connection?
Your engineer confirms the answer before it goes out.
Project Intelligence
Ask the project. Get an answer with sources.
To get answers back
Ask a question, get the answer with the sheet or spec section behind it.
Saved per lookup
The time it takes to find a spec value or detail by flipping through the set and spec book.
Any time on the project
Stop searching sheet by sheet. Ask a question in plain language and get an answer from the drawings and specifications, with the source to check.
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What rating do the corridor walls need?
Open the source to confirm.
Who it’s for
Built for the firms that produce the drawings.
Subtillis is for architecture and engineering firms that produce and stamp construction documents. If your team reviews its own sets before they go out, it was built for you.
Architecture firms
Plans, schedules, details, and specs that agree.
MEP firms
Systems that match across plans and schedules.
Civil firms
Site work that lines up with the building.
Structural firms
Framing, schedules, and details in sync.
What does the QA/QC agent check?
The QA/QC agent takes on the review work that usually takes the longest: coordination conflicts across disciplines, missing references, callouts to details that don't exist, missing details, and inconsistencies with the specifications. It can also flag potential code issues. Each finding links to its source so your team can evaluate it quickly.
How much faster is review with Subtillis?
Our benchmark is about 20% faster review of design development and construction document sets. Subtillis clears the mundane cross-sheet checks quickly, so your architects and engineers can spend their time on the design decisions that need them. Results vary with the set, the disciplines involved, and your review process.
Does this replace our QA/QC process?
No. Subtillis speeds up your review; it doesn't replace it. Your architects and engineers still evaluate the findings, resolve the design, and make the final decisions. AI can miss issues or flag something that is intentional. A completed review is not a certification that a set is complete or code compliant.
Who is Subtillis for?
Architecture, MEP, civil, and structural firms that produce and stamp construction documents. QA/QC is where most teams start; the same project documents then power RFI and submittal drafting and project answers during construction.
Do we have to change how we produce drawings?
No. Start with the drawing PDFs and specifications your team already produces. Subtillis reviews the documentation outside your authoring environment, so it fits alongside your existing production and review process.
How does the free trial work?
Request a trial with your work email. Our team sets up your firm's account by hand and emails your invitation within 24 hours. The trial includes 100 credits, enough to review about 25 drawing sheets: enough to try Subtillis on a real project. No payment details are needed.
Can we discuss security before uploading project files?
Yes. Email hello@subtillis.ai with your firm's security, confidentiality, and procurement requirements. We can discuss data handling and access before you upload any project documents.
Free Trial
Clear the busywork. Get back to the design.
Run Subtillis on your own sheets and review about 20% faster. Request a free trial and we’ll email your account details within 24 hours.
Try it free