Diameter Pay Raises $10M Series A Led by CMT Digital for USD Payment Infrastructure

Diameter Pay Closes $10M Series A

Diameter Pay, a Jersey City-based provider of compliance-first infrastructure for global U.S. dollar payments, has raised $10 million in Series A funding. The round was led by CMT Digital and closed on September 3, 2026.

Additional investors participating in the round include BitRock Capital, Lightspeed Faction, SixThirty Ventures, Tech Council Ventures, Onigiri Capital, and the Stellar Development Foundation.

What Diameter Pay Does

Diameter Pay builds infrastructure that gives banks, fintechs, and digital asset exchanges access to U.S. dollar accounts and payment rails through a single API. The platform spans:

• U.S. virtual accounts
• Domestic and international payments
• Stablecoin on- and off-ramps
• Embedded compliance controls across multiple U.S. banking partners

The company focuses on cross-border corridors where access to the U.S. dollar is hardest to obtain.

Traction

Diameter Pay has processed more than $10 billion year-to-date in 2026, according to the company.

Company Background

Founded in 2017 at MIT under the name SendFriend, the company rebranded to Diameter Pay in April 2023. It is headquartered in Jersey City, New Jersey.

Why It Matters

Access to U.S. dollar accounts and payment rails remains a persistent challenge for institutions operating in emerging corridors and for digital asset businesses that need reliable fiat on- and off-ramps. Diameter Pay's API-first approach consolidates virtual accounts, payments, stablecoin conversion, and compliance into a single integration, which can reduce the operational overhead of maintaining multiple banking relationships and compliance programs.

The participation of investors across digital asset venture capital, fintech, and the Stellar Development Foundation suggests continued interest in infrastructure that bridges traditional dollar banking and stablecoin rails.

Acquisition Angle

For acquirers, Diameter Pay offers a combination of regulated payment infrastructure, multi-bank partner coverage, and demonstrated transaction volume. Banks, payment processors, fintech platforms, and digital asset exchanges looking to add dollar account and stablecoin ramp capabilities could view the company as a strategic asset. Its compliance-first design and focus on hard-to-reach corridors may be particularly relevant to institutions expanding cross-border payment offerings.

Key Facts

• Company: Diameter Pay
• Headquarters: Jersey City, New Jersey
• Founded: 2017 at MIT as SendFriend
• Rebranded: April 2023
• Product: Compliance-first infrastructure for global U.S. dollar payments via a single API
• Capabilities: U.S. virtual accounts, domestic and international payments, stablecoin on- and off-ramps, embedded compliance controls
• Traction: More than $10 billion processed year-to-date in 2026
• Round: Series A
• Amount: $10 million
• Currency: USD
• Date: September 3, 2026
• Lead investor: CMT Digital
• Investors: CMT Digital, BitRock Capital, Lightspeed Faction, SixThirty Ventures, Tech Council Ventures, Onigiri Capital, Stellar Development Foundation

What to Watch

With the Series A capital, Diameter Pay is positioned to expand its payment rails, deepen banking partnerships, and grow coverage in cross-border corridors. Its ability to scale compliance operations alongside transaction volume will be a key indicator for potential acquirers evaluating the company's fit in the global payments and digital asset infrastructure landscape.