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About Diameter Pay
Diameter Pay is a stablecoin payment infrastructure company providing USD payment services to banks, fintech firms, and digital asset exchanges. Through a single API, clients gain access to USD virtual accounts, domestic and international payment rails, stablecoin on/off-ramps, and embedded compliance controls.
Its core strength lies in a compliance-first architecture. As correspondent banks retreat from markets due to sanctions and anti-money laundering risks, Diameter Pay manages risk through technology, data, and compliance infrastructure, bridging traditional finance and digital finance. The platform supports virtual accounts and compliance controls across multiple banking partners, ensuring safe and compliant cross-border USD flows.
The market pain point is the fragmentation of the global financial system—legitimate businesses struggle to access USD. Diameter Pay addresses this by providing a regulated USD gateway, enabling financial institutions to compliantly offer USD account services to their customers.
In the past six months (March to September 2026), the company processed over $10 billion in payment volume year-to-date, serving more than 10,000 end users. Sponsor banking partners include Portage Bank and SSB Bank, with another undisclosed publicly-listed sponsor bank. The platform continues to expand its banking partner network and deepen stablecoin infrastructure. No significant negative developments were reported during this period.
Diameter Pay, formerly SendFriend, was founded at MIT in 2017 with a focus on cross-border remittances. In April 2023, it rebranded as Diameter Pay, pivoting to a stablecoin payment infrastructure that provides banks, fintechs, and digital asset exchanges with USD virtual accounts, payment rails, and stablecoin on/off-ramps. In 2026, it raised a $10 million Series A round co-led by CMT Digital and Lightspeed Faction, with participation from SixThirty Ventures and others. The company has processed over $10 billion in payment volume and plans to expand its banking and payment capabilities.
In the past six months (2026-03-04 to 2026-09-04), Diameter Pay announced a $10 million Series A funding round on September 3, 2026, co-led by CMT Digital and Lightspeed Faction, with participation from SixThirty Ventures, Stellar Development Foundation, Tech Council Ventures, Onigiri Capital, and BitRock Capital. The company has processed over $10 billion in payments year-to-date and serves 10,000+ end users. Future focus includes expanding banking and payment capabilities, deepening stablecoin and FX infrastructure, and strengthening compliance tools. The company also plans to grow its team and enter new markets, particularly in emerging Asia, leveraging its on-chain settlement options and real-time AML monitoring partnership with Flagright.
David Lighton (Founder & CEO)
David Lighton is the founder and CEO of Diameter Pay, a stablecoin payment infrastructure company. He previously worked at the World Bank as a Special Assistant, where he developed Haiti's National Financial Inclusion Strategy after the 2010 earthquake. He also consulted for the International Finance Corporation (IFC). Lighton holds an MBA from MIT Sloan, an MA from Johns Hopkins SAIS, and a BA from Johns Hopkins. He was instrumental in launching one of the world's first blockchain-based global settlement networks while at Ripple Labs.