Diameter Pay has raised $10 million in Series A funding to expand a payments platform built around U.S. dollar accounts, conventional payment rails, and stablecoin on- and off-ramps.
CMT Digital and Lightspeed Faction co-led the equity round.
SixThirty Ventures, the Stellar Development Foundation, Tech Council Ventures, Onigiri Capital, and BitRock Capital joined as additional investors.
The company markets itself as infrastructure for banks, fintechs, and digital-asset exchanges that want dollar access without assembling that stack themselves.
Through US banking partners, Diameter Pay issues virtual dollar accounts that overseas platforms can offer their own customers.
The same interface supports domestic transfers, cross-border payments, stablecoin conversions, and embedded compliance controls.
Clients do not have to stitch together a bank, a payments processor, and a crypto ramp. Diameter Pay presents those pieces as one product.That packaging has produced large volumes.
The firm says it has processed more than $10 billion in payments so far in 2026. The figure is central to the fundraising story because it suggests demand is not theoretical.
Institutions are moving money through a layer that sits between regulated dollar banking and digital asset rails.
The new capital is earmarked for three related jobs.
First, Diameter Pay wants more banking and payment coverage so more counterparties can send and receive dollars through the platform.
Second, it plans to deepen stablecoin and foreign-exchange infrastructure so clients can convert and settle across more corridors.
Third, it intends to keep investing in compliance technology.
Cross-border dollar movement is constrained less by software speed than by sanctions screening, anti-money-laundering controls, and the willingness of banks to sponsor the activity.
The company is selling precision around those risks rather than a promise that risk disappears.
Founder and chief executive David Lighton framed the problem as a mismatch between a more global economy and a more fragmented financial system.
Correspondent banking has pulled back from parts of the market as sanctions and AML pressure have risen. Legitimate businesses can lose access to dollar rails for reasons that have little to do with their own conduct.
Lighton’s argument is that asking banks to take more opaque risk is the wrong answer.
The better answer, in his telling, is better data, better tooling, and better controls so banks can see the risk and still participate.
Diameter Pay wants to be that bridge between traditional finance and digital finance, allowing money to move at the pace of a market that no longer sleeps.Investors used similar language.
Charlie Sandor of CMT Digital said stablecoins are changing how dollars travel internationally but do not replace the need for trusted access to the US banking system.
In that view, Diameter Pay is the connective tissue: traditional payment rails, stablecoin infrastructure, and compliance packaged for regulated institutions.
Tim Khoury of Lightspeed Faction argued that modernizing global payments with stablecoins is not mainly a technology problem.
The scarce asset is reliable, trustworthy banking and compliance infrastructure.
He said Diameter Pay started there and won client trust as a result.
Evan Thorpe of SixThirty Ventures went further, saying the modern payments stack is no longer about speed to market so much as speed to trust.
Verified counterparties, transactions screened before they move, and licensed settlement behind them are the components.
Diameter Pay, he said, is the settlement layer that turns those pieces into dollars that actually arrive across borders.
The timing of the raise matters. Stablecoins have become a practical tool for moving dollars quickly and cheaply, especially in corridors where correspondent banking is slow or expensive.
At the same time, regulators and banks still care about who sits behind an account, where funds originate, and whether settlement happens through licensed institutions.
Products that only offer a crypto wallet struggle with that requirement.
Products that only offer a traditional bank account struggle with speed and global reach.
Diameter Pay is betting that the winning design is a regulated wrapper around both.
The $10 million round is not large by late-stage fintech standards, but it is the company’s first widely announced institutional equity financing of this kind and is meant to fund the next phase of coverage rather than prove the concept from zero.
Volume already on the platform gives investors a concrete signal.
The open question is whether Diameter Pay can add more sponsor banks, more corridors, and more compliance capacity without losing the control that made banks willing to work with it in the first place.
If the company executes, it becomes a quiet piece of plumbing: virtual dollar accounts for foreign fintechs, ramps for stablecoins, and a compliance layer that lets regulated firms use both.
If it fails, the same tensions that emptied correspondent networks will reappear at the edge of digital asset payments. The Series A is a wager that those tensions can be managed with better infrastructure rather than endured as a permanent tax on cross-border commerce.