When Trunk Tools raised its $40 million Series B, the company’s pitch was that construction’s real crisis is information trapped in documents nobody can find. The product that thesis pointed at now has a name. On June 17, founder and CEO Dr. Sarah Buchner announced Cortex — what the company calls “the brain of construction” — alongside five new workflow agents available the same day.
The framing is deliberate. Trunk Tools is no longer positioning itself as a collection of point tools but as a single intelligence layer: integrate the systems a project already runs on, sync the documents and data into Trunk Tools, and let Cortex wire it all together into one connected graph that the agents draw from. The agents are the surface; Cortex is the substrate underneath them.
The Claim That Matters: Reading Drawings, Not Just Text
The headline technical claim is that Cortex interprets drawings rather than treating them as flat images or stripping them down to extractable text. Most “AI for construction documents” tooling — including the document-retrieval features now shipping inside Procore’s Copilot and Autodesk’s Forma — is fundamentally text-first. It indexes specifications, RFIs, and submittal logs, and it answers questions by retrieving passages. Drawings, where the bulk of a building’s actual design intent lives, are the hard part. They are dense, visual, cross-referenced, and unforgiving.
Trunk Tools is putting a number against that gap. The company claims 97% door-detection precision on sheets, versus 26% for the best generic AI it benchmarked against. Door schedules are a sensible proving ground: a door is a discrete, countable object that appears on plans, in schedules, in specs, and in hardware submittals simultaneously, and getting it right requires connecting all of those references. The specific figure should be read as a vendor benchmark rather than an independent result — but the choice of metric signals where the company believes the moat is. If you can reliably read objects off a drawing and connect them to everything else in the project record, you can do things a text-only system structurally cannot.
That is the premise behind TrunkBrowse, the most novel of the five launches.
The Five New Agents
TrunkBrowse [Beta] is the most direct expression of Cortex as a knowledge graph. Click any object on a sheet and its full context opens beside it: the schedule row, the relevant spec section, related RFIs and submittals, and every other sheet the object appears on. Trunk Tools describes it as “the visual surface of the Cortex knowledge graph” — which is the right way to understand it. The value isn’t the click; it’s that the click resolves to a connected set of records because the underlying graph already linked them.
TrunkReview monitors the project management system, and the moment a revision lands it compares every sheet against the prior version, highlights every change — clouded or not — in an overlay, and drafts the narrative. The “clouded or not” detail is the point: the industry relies on contractors to manually cloud their changes, and the changes that slip through uncloudeded are exactly the ones that cause expensive surprises. The company cites 70–85% faster issue detection and notes that under 5% of bulletins currently arrive with a quality narrative.
TrunkRFI checks draft RFIs against past responses, specs, and drawings before they go out, drafts the ones a team genuinely needs, and analyzes incoming responses for impact with recommended next steps. Trunk Tools claims roughly 20% of RFIs are already answered somewhere in the existing project record — meaning a fifth of the RFI workload is, in effect, re-asking questions the documents have already resolved.
TrunkBid reads every subcontractor bid against the project scope and maps each line item to requirements, surfacing the gaps, exclusions, and silences hiding across bidders. Scope coverage at buyout is one of the highest-leverage and most error-prone moments on a project; a missed exclusion discovered after award becomes a change order. The company puts the manual version of this work at four to eight hours per trade package.
TrunkRegister reads the entire spec book, captures every requirement, categorizes each as Action, Informational, or Closeout, and pushes a finished submittal register back to the PMS — work the company pegs at 30-plus hours done by hand, with a claim of 100% spec coverage.
These join the agents already in market: TrunkText, the text-message interface to the full project record that the company says has fielded 115,000-plus questions, and TrunkSubmittal, which the company credits with a 74% median reduction in submittal cycle time. An executive dashboard for portfolio-level visibility is flagged for the second half of 2026.
Why “Agents That Hand Off to Each Other” Is the Real Pitch
The strategic argument Buchner is making is less about any single agent and more about what connects them. Cortex’s claim is that a drawing change detected by TrunkReview can flow into a TrunkRFI draft; a scope gap surfaced by TrunkBid connects to the bid record; a spec requirement parsed by TrunkRegister is the same object TrunkSubmittal later checks compliance against. One graph, many agents, all reading from and writing to the same connected layer.
That is a direct shot at two competitor categories at once. The incumbents — Procore, Autodesk, Trimble — are, in Trunk Tools’ telling, bolting AI onto platforms that were assembled through acquisition and were never designed around a unified intelligence layer. The new entrants ship point solutions that solve one workflow and stop there. Cortex’s bet is that the value compounds only when the agents share a brain, and that you cannot retrofit a brain onto software that wasn’t built for one.
It is a clean narrative, and it lines up with the broader pattern this publication has tracked: contract intelligence becoming the spine of Trimble Construction One via Document Crunch, Autodesk pushing into operations with MaintainX. Everyone is racing to own a connective layer. Trunk Tools’ differentiator is the claim that it can read the drawings the others can’t.
The Workforce Argument Underneath It
Buchner anchored the launch in the same demographic case she has made since founding the company in 2021: nearly 17 million infrastructure and construction workers projected to leave the industry over the next decade, with almost 40% of today’s skilled trades already over 45. The framing is intelligence augmentation, not replacement — absorb the document grind so the experienced people who remain spend their time building rather than hunting through specs.
That positioning is commercially load-bearing as much as it is philosophical. An industry shedding its most experienced people cannot adopt tools that threaten to automate workers out of roles, but it has every incentive to adopt tools that make the workers it still has dramatically more effective. Whether Cortex delivers on the connected-brain promise — or whether the agents end up feeling like well-marketed point solutions sharing a logo — is the question the next year of deployments will answer. The benchmark numbers are the company’s own. The proof, as always in this industry, will be the project record.
Cortex is live now at cortex.trunktools.com, with the five new agents available to customers immediately and the executive dashboard slated for the second half of 2026.
