Miter Is Building an Operating System for Construction

Miter is building a construction operating system that connects payroll, HR, compliance, expenses, field operations, and job costing. Founded in 2021 by CEO Connor Watumull and COO Tobin Paxton, the San Francisco company says more than 2,000 contractors and 150,000 users rely on its platform. Miter matters now because contractors need a shared operational record across the field and back office, while AI is beginning to automate workflows where mistakes can affect workers, regulators, and project margins.

A Payroll Problem Became a Bigger Product Thesis

Miter began with a problem that looks narrow until it touches a real construction business: payroll. Construction teams may work across states, unions, prevailing-wage rules, job codes, benefit structures, and certified payroll requirements. Time captured in the field has to become an accurate paycheck, a compliant record, and a reliable labor cost inside the project ledger.

In a Miter-published transcript of a 2026 CFMA interview, Paxton traced the company's origin to a Thanksgiving conversation about construction payroll and weeks spent learning from Bay Area contractors. He also said he personally implemented roughly 200 customers. That proximity helped turn payroll from a standalone product into an entry point for a broader operating system.

The distinction is important. A generic workforce product can record hours or issue payments. A construction system has to understand how labor moves through projects, classifications, jurisdictions, and cost codes.

Connecting People, Projects, and Payments

Miter's current platform brings human capital management, field operations, and expense management into one environment. The company's product site lists payroll, HRIS, benefits, recruiting, time tracking, scheduling, daily reports, production, safety, reimbursements, corporate cards, per diems, accounts payable, prevailing wage, certified payroll, and union payroll.

That breadth is not simply a feature checklist. The strategic value comes from shared data. Time entries can feed payroll and job costing. Expenses can stay attached to projects. Compliance records can reflect the same employees, classifications, and pay rules used to calculate wages. Field reports can give the back office a more current picture of production.

Miter also supports integrations with accounting, ERP, HR, and workforce-management systems. That acknowledges a practical reality: contractors rarely replace every system at once. A credible operating layer has to consolidate core workflows while still exchanging data with the rest of the stack.

Traction Shows the Cost of Fragmentation

Miter reports more than 2,000 contractor customers, more than 150,000 users, and more than $8.5 billion in payroll processed annually. Its September 2026 financing announcement says customer count tripled over 18 months and that roughly 2% of U.S. construction workers are paid through Miter. Those are company-reported figures, but together they show that the product is moving into consequential operational territory.

The company's customer material spans specialty and general contractors, with examples from mechanical, electrical, roofing, and commercial construction. This is a useful market signal. Fragmentation is not limited to one trade, and the same contractor can face different labor, compliance, and reporting demands from one project to the next.

That variability is why software consolidation matters. Every manual transfer between a timekeeping tool, payroll system, spreadsheet, expense product, and accounting platform creates another place for delays or mismatched data.

AI Enters a High-Trust Workflow

Miter is positioning AI inside both the back office and the jobsite. The company describes software that can structure invoice, receipt, and pay-table data, automate repetitive workflows, surface labor and job-cost trends, generate safety reports from photos or voice notes, and summarize job status.

Construction offers unusually concrete AI use cases because so much operational information begins in documents, field notes, images, and disconnected systems. Turning that material into structured data can reduce administrative work and give managers faster visibility.

But the trust threshold is high. If an AI-assisted workflow misreads a wage table, assigns labor to the wrong job, or produces an incomplete safety record, the error does not remain inside the software. It can reach a paycheck, compliance filing, project forecast, or incident review. Miter's product opportunity therefore grows with its obligation to make automation inspectable and correctable.

Funding Expands the Ambition

On September 30, Miter announced a $40 million Series B led by Battery Ventures, with existing investors Bessemer Venture Partners and Coatue participating. The company says it has now raised $78 million in total capital. No valuation or audited revenue was disclosed.

Miter plans to use the financing to deepen its AI products, grow engineering teams in San Francisco and New York, and expand U.S. go-to-market teams. The current careers page describes the mission and both offices, although its job widget showed no open roles when reviewed. The useful hiring signal is therefore the capability Miter says it intends to build, not a current vacancy count.

Engineering growth suggests the company is still investing heavily in product depth. Go-to-market expansion suggests it believes the model can travel across more contractor types and regions. Both depend on implementation quality, because construction customers cannot pause payroll or compliance work while software catches up.

What Miter Signals for Construction Technology

Miter reflects a larger shift from point solutions toward systems that connect the construction field with finance and people operations. The category is moving past digitizing individual forms. The harder objective is to create a dependable data layer that explains who worked, where the work happened, what it cost, how it was paid, and whether it met contractual and regulatory requirements.

For contractors, that can mean fewer duplicate entries and faster decisions. For workers, it can mean more accurate pay and records. For owners and project leaders, it can mean a clearer view of labor, production, safety, and margin before a problem becomes irreversible.

Miter has meaningful adoption, fresh capital, and a product surface broad enough to pursue that role. The next test is not whether it can add more features. It is whether one connected system can become more trustworthy as the number of customers, jobs, rules, and automated decisions grows.