Bricks & Bytes Bulletin
INTELLIGENCE FOR CONSTRUCTION LEADERS
THIS WEEK’S INSIGHTS
What Paris Taught Us About Buying, Backing, and Building ConTech
Paris this month produced three conversations worth more than the sum of their parts. One came from inside Vinci and Kajima, where corporate innovation leaders explained how a 300,000-person federation actually decides what to buy.
One came from a veteran investor who has watched construction tech grow from a hundred startups to several thousand and has the scar tissue to prove it. The third one came from five founders pitching wildly different products on the same stage, who all hit the same wall on the way out.
Read separately, each piece teaches a lesson. Read together, they sketch the same map from three different vantage points: the buyer's desk, the investor's seat, and the founder's pitch. The construction industry rewards patience, punishes tech tourists, and pays out through acquisition rather than the public markets. Here is what each conversation added to that picture.
3.5hrs back to back. again. in France. again. 2 weeks apart.
The buyer's view: there is no front door
Five corporate innovation leaders from Vinci, Leonard, and Kajima sat down with us in Paris, and the same lesson surfaced in every conversation: a giant contractor is not a single buyer.
Vinci operates as a federation of roughly 4,000 semi-independent business units, what Managing Director Julien Villalongue calls little countries or an archipelago, and purchasing happens locally rather than at the top. Leonard's Kevin Cardona put it plainly on stage, describing his team's role as matchmaking between two entrepreneurs rather than brokering a group-wide contract.
The founders who get through lead with a pain the team already feels, a habit Cardona calls 'problem-pull' rather than 'tech-push'. The ones who stall arrive with a polished product and hope the operation reshapes itself around it. As Cardona put it on stage, describing his team's role:
"We don't sell to Vinci. That doesn't make any sense. We help two entrepreneurs talk to each other."
Proving value on one project immediately beats any story about returns pooled across a portfolio over ten years because the person signing off is looking at one job and one budget. Once a pilot works, scaling becomes change management more than engineering, with peer operators across business units doing more convincing than any vendor deck ever could.
Read the full conversation: The Construction Giants' Buying Playbook, From Inside Vinci and Kajima
The investor's view: a cool demo is not a moat
Darren Bechtel of Brick & Mortar Ventures has eleven years of seed and Series A checks behind him, and at the BuiltWorlds Paris Global Summit he named what worries him most right now: a flood of AI-powered takeoff and estimating tools that demo beautifully and defend nothing. He has watched this script before, and the parallel he draws is pointed.
Darren Bechtel, Founder & Managing Director at Brick & Mortar Ventures, unpacks where construction tech venture capital is heading - and why the next wave of winners will need more than hype.
The rhyme with drones. The last time a shiny technology had every founder rushing to sell into construction, it was drones. A handful of those companies reached valuations in the hundreds of millions, then went through painful recapitalizations once customers found only trivial uses for an expensive tool.
The wedge that works. His prescription tracks the buyer-side lesson from Leonard almost exactly: own a narrow, painful workflow first, earn trust on the job site, then expand outward. Levelset did it around mechanics liens before Procore bought it. PlanGrid did it around field drawings before Autodesk paid $875 million for it. As Bechtel put it:
"Nothing gives a project team more heartburn than someone walking in and saying, I have got the AI-enabled operating system for you; can we get everyone in a room?"
The ceiling keeps rising. Autodesk later dwarfed that PlanGrid number with its roughly $3.6 billion purchase of MaintainX, the largest acquisition in the company's history.
The exit is M&A, not an IPO. With Procore standing as close to a sample size of one for a true US construction software IPO, Bechtel's closing point lands hard: the realistic path to a meaningful outcome in this sector runs through acquisition, so founders should build something an acquirer will actually want rather than chasing the next funding headline.
Read the full conversation: What a Top ConTech VC Thinks Founders Are Getting Wrong About AI
The founders' view: the wall has a name
Five founders pitched five unrelated products at the same Paris summit, on a day hosted by Vinci's Leonard: wireless EV charging, AI-driven project risk software, carbon capture bolted onto diesel generators, drill-free geothermal panels, and factory-built net-zero facades. The hardware could not have been more different, but when asked what stops customers from buying, four of the five gave the same answer unprompted.
Not physics, not funding
The barrier, four of the five named, was the industry's own conservatism. EnerDrape's Nicolas Razin called it conservatism and awareness, pointing out there is rarely a budget line for an entirely new category:
Nicolas Razin, Head of Sales at EnerDrape, explains how underground spaces can become renewable heating and cooling sources for buildings.
"The buyer barrier is conservatism and awareness. They don't know us, and there's no special line for us in the tender."
ecoworks' Emmanuel Heisenberg described his hardest job as transforming the customer rather than refining the cranes.
The exception that proves the rule
Kapture's Raj Bagri is the one founder who has not hit that wall yet, and the reason matters. Her hardware is still in field trials rather than selling at scale, so the resistance the other four describe simply has not had the chance to show up.
The playbook the other four share
The same four moves kept surfacing across very different pitches:
Design for zero behavior change, so nobody on site has to learn anything new.
Win one pilot, then copy it elsewhere rather than reselling the concept each time.
Borrow a tier-one name's credibility to put a cautious buyer at ease.
Strip out any premium, so the decision comes down to plain economics rather than a leap of faith.
Vinci, fittingly, turns up behind nearly every one of them, as backer, R&D partner, or customer.
Read the full conversation: What Five Startups at the BuiltWorlds Paris Summit Learned About Selling Into Construction
The common thread
Three rooms, three audiences, one industry that keeps teaching the same lesson from different angles. The buyer wants a single project, a single pain, and proof before a wider rollout. The investor wants a workflow worth owning before a platform worth building. The founder, whether selling charging pads or carbon capture, runs into a buyer who trusts a peer's reference over the cleverest pitch deck.
None of this makes construction tech a harder business than it looks from the outside. It makes it a different one. The companies that win here are not the ones with the loudest demo. They are the ones patient enough to win a single business unit, a single lien clerk, a single skeptical site manager, and let that one win travel on its own. Paris made the pattern impossible to miss across an investor's portfolio, a corporate buyer's checklist, and five founders comparing notes on the same stage.
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