Miter, a San Francisco company that runs payroll and workforce operations for construction contractors, said Sept. 30 that it raised a $40 million Series B led by Battery Ventures, bringing total funding to $78 million.
Existing backers Bessemer Venture Partners and Coatue also put money in, according to the company’s announcement. Miter said it has tripled its customer count since its Series A in May 2025 and now serves more than 2,000 contractors.
The claim the company leads with is a payroll statistic: roughly two of every 100 American construction workers are now paid through Miter, it said. Named customers include Clayco, which the company describes as an ENR Top 5 design-build firm, and Haugland Group, an infrastructure services contractor with more than 1,600 employees.
Back office, not the jobsite model
Much of the construction-technology funding RealtyWire has covered this year has gone to companies pointed at the jobsite itself β progress tracking, autonomy, computer vision. Miter is aimed at the other half of the business: payroll, HR, field operations, expense management, job costing and safety reporting in a single system.
The company describes its product as an “AI-native operating system” for contractors. The specific functions it lists are unglamorous and concrete: parsing invoice and receipt data, automating manual workflows, surfacing labor and job-cost trends in real time, generating safety reports from photos or voice notes, and summarizing job status.
That is a harder problem than generic HR software treats it as. Contractors deal with prevailing-wage requirements on public work, multiple union agreements, crews splitting a single day’s hours across several cost codes, and certified payroll reporting β the reasons payroll in the trades tends to stay manual.
“The U.S. has never needed this much new infrastructure this fast,” said Connor Watumull, chief executive and co-founder. “We need to unleash the potential of electricians, welders, carpenters and ironworkers everywhere. Miter is helping contractors modernize their operations and unify their workforce, jobsites and financials in one system.” Watumull founded the company with Tobin Paxton.
Michael Brown, a general partner at Battery Ventures, said the sector has been hard for software vendors to crack. “The construction industry is tremendously complex, which has made it difficult for technology providers to develop robust tools attuned to customers’ specific demands, despite the large potential market,” he said. “The traction they’ve achieved is impressive, and we’re excited to watch them leverage technology to take on more of the work their customers do by hand today.”
Capital keeps finding construction software
The round lands in an active stretch for the category. Buildots raised $130 million for construction AI aimed largely at the data center buildout, and SoftBank put $200 million into construction robotics startup Gravis Robotics in August at a $1 billion valuation. Miter’s $40 million is a smaller round in a less capital-intensive corner of the same market.
The demand backdrop is real. Construction payrolls grew by 22,000 in August, as covered in our report on the August jobs numbers, and contractor backlog rebounded to 8.5 months with one in six contractors reporting data center work. Whether back-office software converts that activity into durable subscription revenue is a separate question, and Miter did not disclose revenue, growth rate or valuation.
What the money is for
Miter said it will keep investing in AI products for back offices and jobsites, significantly grow engineering teams in San Francisco and New York, and add to go-to-market teams across the U.S. It did not give headcount targets or a hiring number.
The company also did not disclose its post-money valuation, the size of the Series A that preceded this round, or how the $78 million raised to date breaks down by round beyond the $40 million announced here. For more on software and AI reshaping the industry, see our technology and AI coverage.
