Funding

Fintech Startup Diameter Pay Raises $10 Million in Series A Funding

Sep 4, 2026 | By Devin Jacobs

SUMMARY

Diameter Pay raised $10M in Series A funding.
The funding will support payments and technology growth.
Diameter Pay provides global payment infrastructure.

Diameter Pay, a fintech platform building the infrastructure for global U.S. dollar payments and virtual accounts, has raised $10 million in a Series A financing round co-led by CMT Digital and Lightspeed Faction.

The round also saw participation from SixThirty Ventures, Stellar Development Foundation, Tech Council Ventures, Onigiri Capital and BitRock Capital.

The company will use the funding to expand its payment infrastructure, strengthen stablecoin and FX capabilities, and invest in technology and compliance systems.

Funding Snapshot

Metric	Details
Fundraise Amount	$10 Million
Valuation	Not disclosed
Company	Diameter Pay
Sector	Fintech / Payments
Headquarters	Not disclosed

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About Diameter Pay

Founded in 2023 by David Lighton, Diameter Pay provides infrastructure that helps banks, fintechs, digital asset exchanges and their customers access U.S. dollar accounts, and payment rails through a single API. The platform supports virtual accounts, domestic and international payments, stablecoin on and off ramps and embedded compliance controls across multiple U.S. banking partners.

The company has processed more than $10 billion in payment volume year-to-date in 2026.

Core offerings include:

U.S. virtual dollar accounts
Domestic and international payment rails
Stablecoin on- and off-ramps
Embedded compliance infrastructure

Core Technologies / Products / Services

Capability/Product	Application/Use Case
Virtual Accounts	Provides access to U.S. dollar accounts
Payment Rails	Enables domestic and international dollar payments
Stablecoin Infrastructure	Connects digital dollars with the banking system
Compliance Controls	Helps financial institutions manage payment and digital-asset risks

Leadership Comments

"The world is becoming more global, but the financial system is becoming more fragmented," said David Lighton, founder and CEO of Diameter Pay. "Diameter Pay takes a different approach: rather than asking banks to accept more risk, we provide the technology, data, and compliance infrastructure to understand and manage that risk with greater precision.

"The modern payments stack is no longer just about speed-to-market; it's about speed-to-trust. The components: verified counterparties, transactions screened before they move, and licensed settlement behind them," said Evan Thorpe, Principal at SixThirty Ventures. "Diameter is the settlement layer that ties each of those critical parts together, turning a trusted counterparty, and a clean transaction into dollars that actually arrive, compliantly, across borders.