Trunk Tools Raises $40M Series B to Bring Construction AI Agents to the Frontlines

Trunk Tools, the AI company redefining how construction professionals access, interpret, and act on their project data, has secured $40 million in Series B funding. Led by Insight Partners with participation from Redpoint Ventures, Innovation Endeavors, Stepstone, Liberty Mutual Strategic Ventures, and Prudence, the round brings the company’s total funding to $70 million.

At a time when the global construction industry is worth nearly $10 trillion and climbing, inefficiencies and outdated workflows continue to drain time and capital. From schedule delays to data fragmentation, construction teams have long operated in information-rich but insight-poor environments. Trunk Tools is changing that by introducing AI agents that think, reason, and act like an experienced member of the team.

From the Ground Up: A Platform Built by Construction Veterans

Founded by Dr. Sarah Buchner—who began her career on jobsites as a carpenter at just 12 years old—Trunk Tools is rooted in practical field knowledge. After progressing to superintendent, project manager, and eventually earning a Ph.D. in civil engineering and data science, Buchner set out to solve the systemic challenges she saw repeated across projects.

Her vision wasn’t just another dashboard or document search tool—it was an AI-first system that could mimic how humans think through construction problems. The result is a platform that reads, understands, and structures the chaos of real-world construction documentation: blueprints, specs, RFIs, submittals, meeting minutes, contracts, and more. With this structured foundation, Trunk Tools can answer complex natural-language queries and drive automation across the entire lifecycle of a project.

More Than Search: AI Agents That Execute

At the heart of Trunk Tools is a proprietary architecture built specifically for construction data. Unlike general-purpose language models that hallucinate or misinterpret technical context, Trunk Tools’ agents are fine-tuned to reason over project-specific datasets. This includes interpreting drawing sheets, understanding dependencies in schedules, parsing procurement logs, and correlating RFIs with submittals in real time.

For example, a field engineer can ask, “Is the elevator pit waterproofing spec included in the latest submittal?” or “What’s delaying HVAC delivery for Level 3?” and receive accurate, explainable answers—backed by source documents.

But the platform doesn’t stop at Q&A. Trunk Tools features autonomous agents that manage full workflows:

• Schedule Agent: Monitors real-time updates across trades, compares plan vs. progress, and flags discrepancies or delays.
• Submittal Agent: Tracks approvals, scans for mismatches, and identifies missing data or dependencies.
• Risk Agent: Continuously reviews documents and communications to surface potential coordination clashes or compliance risks before they escalate.

These agents operate persistently in the background, like full-time analysts embedded in every project team.

Designed for the Jobsite, Integrated with the Stack

Rather than adding friction to existing workflows, Trunk Tools fits directly into the tools contractors already use. The platform connects seamlessly with Procore, Autodesk Build, SharePoint, Egnyte, Box, and other common file systems—pulling in data where it lives and eliminating the need for manual uploads or migrations.

The AI interface is designed with field operability in mind. Voice-enabled search, mobile optimization, and instant document retrieval ensure the platform is just as useful in muddy boots as it is in the trailer office. Teams save an average of 20–40 minutes per search and significantly reduce costly rework by catching issues earlier.

Traction and Growth

Over the past year, Trunk Tools has deployed its platform on hundreds of active construction projects and grown revenue by more than 5x. The company serves clients across the U.S. and Canada, including large general contractors and specialty trades. Early adopters report not only time savings and improved project coordination but a shift in how teams think about knowledge management—moving from reactive document lookup to proactive decision-making.

With the new funding, Trunk Tools will expand its engineering and product teams, grow field enablement programs, and extend the platform’s reach to mid-market and long-tail construction firms. A key focus will be enhancing agent autonomy—allowing AI to not only identify issues but recommend solutions in line with best practices and project goals.

Why It Matters Now

The construction industry accounts for 7% of global GDP but remains one of the least digitized sectors. Labor shortages, volatile supply chains, and increasingly complex project scopes have placed enormous pressure on builders—yet most are still navigating their work with static PDFs and manual data entry.

Trunk Tools is emerging as a foundational layer for the future of construction operations. By turning unstructured project data into a living, interactive system of intelligence, the platform unlocks the true potential of field teams. It’s not just about automation—it’s about amplifying human judgment with real-time, explainable insight.

Dr. Buchner put it plainly: “General-purpose AI isn’t enough. Construction needs AI that speaks its language, understands its risks, and earns the trust of the people doing the work. That’s what we’re building.”

Looking Ahead: A Smarter Built Environment

As Trunk Trunk Tools scales, its impact may go far beyond operational efficiency. The platform is laying the groundwork for a smarter, more adaptive built environment—one where buildings are not just constructed faster, but with greater foresight, less waste, and fewer errors.

In the long term, this technology could reshape how projects are scoped, priced, and delivered—from megaprojects and hospitals to schools and infrastructure. By embedding intelligent systems directly into the jobsite workflow, Trunk Tools is turning construction into a data-driven discipline—one that rewards coordination, clarity, and continuous improvement.

In an industry where billions are lost every year to rework and delays, Trunk Tools isn’t just solving for productivity. It’s building the foundation for what construction can become.