Diameter Pay, a stablecoin payments infrastructure startup, secured $10 million in a Series A funding round co-led by CMT Digital and Lightspeed Faction. The startup provides payment infrastructure for banks, fintechs, and digital asset exchanges, offering access to U.S. dollar virtual accounts, domestic and international payments, stablecoin on- and off-ramps, and compliance controls. Diameter Pay has processed over $10 billion in payment volume this year-to-date.