AI Agent · California · Crunchbase News
How A Teenage Carpenter Became The Founder Of AI Construction Startup Trunk Tools
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Editor’s note: The following is the second profile in a series of articles about startup founders from non-technical backgrounds who have launched successful venture-backed companies.
Key facts
- Its most recent funding round was a $40 million Series B in 2025 that valued Trunk Tools at $325 million
- Trunk Tools calculated that the change would add nearly $4 million to a roughly $100 million project
- The company has raised about $70 million in funding from investors such as Insight Partners, Redpoint and Innovation Endeavors
- She founded Trunk Tools in 2021 while she was still in business school, graduating in 2022
Summary
Before founding Trunk Tools, an AI startup for the construction industry, Sarah Buchner spent more than a decade working in construction. “I’m a blue-collar worker by background,” she explained. Buchner never left the industry. “Once you realize that people die under your management, you look at life differently,” Buchner said.