a16z backs Unlimited Industries funding to build AI construction

The US needs trillions of dollars in new infrastructure, from data centers to critical mineral facilities, but the construction industry is notoriously slow and expensive. A new startup, Unlimited Industries, believes the solution isn’t better software, but entirely replacing the traditional model with AI.

Unlimited Industries has secured $12 million in seed funding, co-led by Andreessen Horowitz (a16z) and CIV, to accelerate its mission to become an AI-native construction company. Unlike firms that simply use software tools, Unlimited is vertically integrated: it uses its proprietary AI platform to both design and build large-scale projects.

The core problem Unlimited aims to solve is the decades-old inefficiency baked into construction. CEO Alex Modon, a repeat founder who discovered the industry’s inertia firsthand, argues that the traditional model is "slow, brittle, and fundamentally misaligned."

Unlimited’s platform replaces static, manual design choices with a dynamic, data-driven process. The AI can generate and evaluate hundreds of thousands of design configurations in parallel, optimizing for cost, safety, and performance before a single shovel hits the dirt. This capability allows the company to eliminate the costly handoffs between engineering firms and construction crews that plague major projects.

The results are already proving disruptive. On one industrial project, Unlimited reduced the pre-construction engineering time from six months down to just a few weeks. In another instance, the AI identified an optimal design configuration that cut projected capital costs by over 50 percent.

Flipping the Incentive Structure

The investment thesis hinges on Unlimited’s novel approach to incentives. Traditional engineering firms often profit from delays and change orders via cost-plus contracts. Unlimited’s integrated structure flips this dynamic, turning engineering into a continuous optimization process at near-zero marginal cost.

“The engineering and construction industry has remained largely unchanged for decades,” said Katherine Boyle, General Partner at Andressen Horowitz, emphasizing that Unlimited’s approach is a "paradigm shift."

Unlimited Industries funding will be directed toward scaling its platform, which currently focuses on the most urgent US needs: rapidly building power infrastructure for data centers, advanced manufacturing, and critical mineral facilities. Every project the company undertakes strengthens its models, cost data, and workflows, making the system smarter for the next build.

The company’s broader goal is to restore America’s capacity to build ambitious infrastructure quickly, making speed and adaptability the standard once again.