TLDR: Trunk Tools, an AI-powered platform for the construction industry, has successfully closed a $40 million Series B funding round. Led by Insight Partners, this investment brings their total funding to $70 million and aims to accelerate the company’s growth and its mission to integrate AI agents into construction workflows, addressing over $1 trillion in annual productivity losses within the industry.
NEW YORK, NY – July 24, 2025 – Trunk Tools, a pioneering AI-powered platform transforming how construction teams manage project data, today announced the successful closure of a $40 million Series B funding round. The round was spearheaded by global software investor Insight Partners, with significant participation from Redpoint Ventures, Innovation Endeavors, Stepstone, Liberty Mutual Strategic Ventures, and Prudence. This latest investment elevates Trunk Tools’ total funding to $70 million, marking a pivotal moment in its efforts to combat the construction industry’s deeply entrenched productivity inefficiencies, which are estimated to exceed $1 trillion annually.
Founded by CEO Dr. Sarah Buchner, Trunk Tools was born from her extensive firsthand experience in the construction sector. Starting her career as a carpenter at the age of 12 in Austria, Buchner progressed through roles as a superintendent, project manager, and group leader. Her frustration with daily inefficiencies on job sites motivated her to pursue a PhD in civil engineering and data science, ultimately leading to the development of Trunk Tools – a smarter, more innovative approach to construction project management.
Trunk Tools leverages advanced AI to organize and extract insights from the vast amounts of documentation generated throughout a project’s lifecycle, including drawings, specifications, RFIs, schedules, and submittals. The platform empowers construction teams to ask natural-language questions and receive immediate, accurate, and actionable answers derived from relevant project information. A key innovation is the deployment of fully autonomous AI agents that can manage entire workflows, tasks that previously demanded human intervention. These agents also connect data directly to project schedules, proactively identifying potential issues before they escalate into costly delays or rework.
Jeff Horing, co-founder and managing director at Insight Partners, who will also join the Trunk Tools board, commented on the investment: “Trunk Tools is helping define a new category of AI with its construction platform. Project-level information in the construction industry lives in multiple siloed systems, and accessing that data is a time-consuming and error-prone process for field teams who need it in real time. Sarah and her team of construction tech experts are applying their deep industry experience to address this with modular AI agents.”
Dr. Buchner emphasized the necessity of specialized AI for the industry, stating, “Construction is the backbone of our global economy and daily life, yet the industry is still bogged down by outdated tools, fragmented systems, and overwhelming bureaucracy. We built Trunk Tools to eliminate the guesswork. General-purpose AI simply isn’t advanced enough for an industry built on proprietary data and complex workflows. This new round of funding gives us the resources to bring vertically tailored AI reasoning agents to every job site.”
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The $40 million Series B funding will be strategically utilized to expand Trunk Tools’ engineering, product, and go-to-market teams. It will also support the growth of its field enablement program and further scale the AI platform’s capabilities to handle increasingly complex projects, while also addressing the needs of the broader market. Since its launch of a natural language AI for documentation in 2023, Trunk Tools has seen rapid adoption by major contractors such as Gilbane Building Co. and Suffolk Construction, setting a precedent for other vendors now exploring natural language solutions in construction.
