Miter Raises $40M Series B Led by Battery Ventures

TL;DR: Miter, a San Francisco AI workforce-management platform for construction, closed a $40 million Series B led by Battery Ventures, bringing total funding to $78 million, according to citybiz. Bessemer Venture Partners and Coatue also participated. For accredited investors, it's a read on where vertical AI is moving next.

What Happened

Miter, a San Francisco-based AI workforce-management platform for construction contractors, raised a $40 million Series B led by Battery Ventures, according to citybiz. The round brings Miter's total capital raised to $78 million. Existing backers Bessemer Venture Partners and Coatue also put money in, per the same report.

Miter was founded in 2021 by CEO Connor Watumull and Tobin Paxton, according to citybiz. The company's own announcement, distributed via PRNewswire, describes Miter as a workforce-management operating system that connects payroll, HR, field operations, job costing, and expenses for contractors — the functions Watumull calls construction's "Frankenstack" of 1980s-era software, spreadsheets, and paper.

I've sat on the other side of a cap table enough times to read a Series B press release for what it doesn't say. This one is candid about traction and quiet about valuation. Downside first: that silence is the thing worth noting before anything else.

Why Is Battery Ventures Betting on Construction's Back Office?

I read this round as a bet on distribution, not novelty. Battery Ventures general partner Michael Brown called the construction industry "tremendously complex," which he said makes it hard for technology vendors to build tools that fit contractors' specific needs, according to citybiz. He also pointed to Miter's growth, telling Pulse 2.0 that the traction the company has achieved is impressive and that he's eager to watch it take on more of the manual work contractors currently handle by hand.

The traction figures are specific, and specific is what I look for before I trust a claim. Miter's own release states that roughly two of every 100 American construction workers are now paid through its platform, according to PRNewswire. The company has tripled its customer count since its earlier Series A round and now serves more than 2,000 contractors, according to Pulse 2.0, including design-build firm Clayco and infrastructure-services provider Haugland Group, according to RealtyWire.

That growth sits inside a tight labor market. Construction payrolls grew by 22,000 jobs in August, and contractor backlog rebounded to 8.5 months, with one in six contractors reporting data-center work, according to RealtyWire. A platform that can prove it's already inside 2% of U.S. construction payrolls has a distribution story most vertical-AI startups don't — that's what I'd want proven before I asked a GP to underwrite the next one.

Where This Round Sits in Construction AI

Company	Round	Amount	Lead Investor	What it targets
Miter	Series B	$40M ($78M total)	Battery Ventures	Payroll, HR, job costing, back-office AI
Buildots	Growth round	$130M	Not stated in sources reviewed	Jobsite progress tracking for data-center buildouts
Gravis Robotics	Funding round	$200M (SoftBank), $1B valuation	SoftBank	Construction robotics

Source for Buildots and Gravis Robotics figures: RealtyWire. I'd put Miter on the ledger side of the ledger-versus-jobsite split, not the robotics side. Miter's backers, Battery Ventures, Bessemer Venture Partners, and Coatue, are the same investor group behind Shopify, Toast, Procore, and ServiceTitan, according to Miter's own PRNewswire release. That's a back-office-SaaS pedigree, not a robotics or hardware one, and it tells you which side of construction tech this money is backing: the ledger, not the jobsite.

What Does This Mean for an Accredited Investor?

You can't write a check into Miter's Series B. This is a venture round closed among institutional and existing investors, not an open allocation. The investor takeaway here is pattern recognition, not access: vertical AI is moving from flashy jobsite robotics into the unglamorous back office, and the capital backing it comes from the same funds that built category winners in horizontal B2B SaaS. If you hold positions in venture funds, fund-of-funds, or secondaries exposed to enterprise software, this is the kind of deal that should show up in your manager's pipeline commentary. If it doesn't, ask why.

I'd also flag what Miter didn't disclose. The company did not state its post-money valuation, the size of its prior Series A, or how the $78 million raised to date breaks down by round beyond this $40 million, according to RealtyWire. Growth metrics without a valuation are a marketing choice, not proof of discipline. Judge the deal on what's verifiable, not on the press release's confidence. Verify before you trust a growth percentage a company publishes about itself, that rule doesn't change because the sector is construction instead of Wall Street's menu of public names.

For more on where institutional AI capital is concentrating and what it means for LPs, see our coverage of Khosla Ventures' $5.5 billion raise and Permanent Capital Ventures' $200 million applied-AI fund. We've also tracked smaller, retail-accessible construction-tech raises, including RISE Robotics' Reg CF construction-tech raise, which is a genuinely different access point than this institutional Series B.

If you want this kind of read on where institutional capital is moving before it shows up in your manager's quarterly letter, the free AIN briefing covers deals like this one every week.

Common Mistakes Reading News Like This

• Treating a Series B headline as an invitation to invest. It isn't. Most of these rounds close before the press release goes out.
• Taking a company's own growth percentages ("tripled customer count") as audited figures rather than self-reported marketing language.
• Assuming total capital raised equals valuation. Miter has raised $78 million; its valuation was not disclosed in any source reviewed.
• Conflating construction robotics (jobsite hardware, like Gravis Robotics) with construction workforce software (back-office SaaS, like Miter). They carry different risk and return profiles.

FAQ

Is Battery Ventures a private equity firm? In this deal, Battery Ventures acted as a venture and growth-equity investor leading an early-stage Series B, not a buyout-style private equity sponsor. The firm is represented here by general partner Michael Brown, per citybiz.

What does Miter actually do? Miter is an AI-powered workforce-management platform that connects payroll, HR, field operations, job costing, and expenses for construction contractors, according to its own PRNewswire announcement.

How much has Miter raised in total? $78 million across its Series A and this $40 million Series B, according to citybiz.

Can an individual accredited investor invest in Miter? Not through this round. Series B financings like this one are closed among venture funds and existing backers. There is no public or accredited-investor allocation described in any source reviewed.

Who are Miter's customers? More than 2,000 contractors use Miter, according to Pulse 2.0, including design-build firm Clayco and infrastructure-services provider Haugland Group, according to RealtyWire.

The Next Thing to Do

If you hold venture or growth-equity exposure through a fund, ask your GP directly whether vertical-AI back-office plays like Miter are in the current pipeline, and whether they're priced on disclosed valuations or on growth-rate marketing alone.

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