Archiboost, a San Francisco company whose software reviews construction document sets, announced $6.2 million in combined pre-seed and seed funding on November 3, 2026, led by Hanabi Capital and Marathon Venture Capital. AEC Magazine covered the round on November 11. The product reads drawings and specifications and flags code, coordination and spec conflicts, which puts it in the bid-set review a general contractor’s preconstruction team runs before pricing a job. A beta agent, software that runs a multi-step task on its own, also drafts RFI responses and submittal reviews.
What it does
A team uploads the drawing set, the specifications and any other project documents, or connects the folders where they already live in Autodesk Forma or Procore. Archiboost says the software then checks the whole package in one pass: cross-sheet coordination, code and accessibility, specs against schedules, and the firm’s own standards. Each finding is marked on the sheet with the code section, spec section or detail it conflicts with, and a reviewer can assign it to someone or open it in Revit.
The examples on the general contractor page read like a preconstruction question list. One flags a duct crossing a beam with no sleeve, citing sheets M-201 and S-301. Another finds a hardware set on the drawings that has no match in spec section 08 71 00. A third catches a detail referenced on A-501 that was never drawn. Archiboost frames each of these as a would-be RFI that the estimator or project manager can send to the design team before procurement or construction starts.
CEO Georgios Kontominas told Commercial Observer that the software reads PDF drawings and Revit files together, pairing computer vision, software that reads images, on the PDFs with metadata pulled from the model. He also said no person checks the results before the client sees them, and contrasted that with competitors that have a human review the output.
There are other modules. Rus, a code copilot, answers zoning and building code questions for all 50 states. A weekly coordination run collects the latest consultant drawings on Friday evening and delivers a coordination report on Monday morning. The Construction Administration agent, listed as beta in the announcement and early access on the pricing page, keeps RFIs and submittals in one inbox and drafts responses with citations.
Evidence so far
The evidence is Archiboost’s announcement and website, testimonials from customers quoted there, and an interview Kontominas gave Commercial Observer. The customers named in those sources are architecture firms, including WRNS Studio, OTJ Architects and JLS Architects, plus the developer RXR, which also invested through RXR Arden Digital Ventures.
| Figure | Value | Reported by |
|---|---|---|
| Drawing sheets reviewed since launch | More than 550,000 | Archiboost |
| Project value covered by those reviews | More than $3.5 billion | Archiboost |
| Potential issues flagged | More than 120,000 | Archiboost |
| Building code questions answered | More than 15,000 | Archiboost |
| Issues surfaced compared with manual QA/QC | Up to 6 times as many | Archiboost |
| Coordination problems in the field for teams using it | Up to 70% fewer | Archiboost |
| Redlines returned on one 230-sheet project | 448 | Jesse Smith, JLS Architects, on Archiboost's site |
| Owner requirements checked on one design-build DD review | About 4,000 pages | WRNS Studio in Archiboost's announcement |
The platform totals measure volume. More than 120,000 issues across more than 550,000 sheets works out to about 22 flags per 100 sheets. The JLS project, with 448 redlines on 230 sheets, ran at about 195 per 100 sheets, nearly nine times the platform rate. A set can produce more or fewer flags depending on its design stage, its size and which checks a firm turns on, so the two rates say little about each other.
The comparison figures carry “up to,” which marks each as the high end of what customers saw. The number of projects behind the six-times and 70% figures, and precision, meaning the share of flags a reviewer accepts as real issues, are not yet public.
So the figures a contractor needs will come from a pilot on its own sets: how many real conflicts the tool catches, and how many false flags the team clears to get them.
How to measure it on your projects
Catch rate is the share of a job’s design-related RFIs that the tool flagged on the bid set. A design-related RFI is one caused by a drawing or spec conflict. Means-and-methods questions and owner changes go in a separate bucket. Pair it with flag precision, because a tool that flagged every line on every sheet would score a perfect catch rate.
| Metric | Definition | Baseline to capture before the pilot |
|---|---|---|
| Design RFIs per 100 sheets | RFIs caused by a drawing or spec conflict divided by sheets in the bid set times 100 | Count from the RFI log of one or two closed-out jobs |
| Catch rate | Share of those design RFIs that the tool flagged on the bid set | Run the closed-out job's bid set through the tool and match flags to the RFI log |
| Flag precision | Share of the tool's flags your team accepts as real issues | Have the estimator or PM mark each flag accepted or rejected |
| Review hours per set | Staff hours spent on the bid-set review including working through flags | Hours your team logged on the last comparable bid review |
A closed-out job gives you a test with a known answer:
- Pull the bid set and the full RFI log for one job that finished in the last two years.
- Tag each RFI as design-related or other, and count design RFIs per 100 sheets.
- Run the bid set through the tool and match its flags to the tagged RFIs.
- Have your reviewer mark each flag that matched no RFI as accepted or rejected.
The tagging step is the same work our post on change order rate by cause describes. To track how fast the design team answers the RFIs the tool helps you send early, use the method in measuring RFI turnaround before an AI pilot. For other reviewers in this category, see the posts on Buildcheck and UpCodes.
Availability and cost
Archiboost prices by quote, based on team size, project types and the modules chosen. The pricing page lists integrations with Revit, Autodesk, Procore, Bluebeam, Newforma, SharePoint and Outlook, says the company holds a SOC 2 Type II audit, and says it does not train its models on customer uploads. Kontominas told Commercial Observer the company has 10 full-time employees, has recently expanded to Canada, and will use the funding on the QA/QC engine and the construction administration agent.