---
title: "Diameter Pay’s $10M Series A: Dollar Rails + Stablecoin Ramps for Banks"
description: "Bootstrapped Diameter Pay raised $10M co-led by CMT Digital and Lightspeed Faction after claiming >$10B YTD payment volume — selling compliant USD access, not a consumer remittance app."
date: 2026-09-06T00:00:00.000Z
tags: ["2026-vc-news", "startup-funding", "venture-capital", "fintech", "stablecoins"]
source: https://venturecapitaltracker.com/2026-diameter-pay-10m-series-a-stablecoin-dollar-rails
---

# Diameter Pay’s $10M Series A: Dollar Rails + Stablecoin Ramps for Banks

> Bootstrapped Diameter Pay raised $10M co-led by CMT Digital and Lightspeed Faction after claiming >$10B YTD payment volume — selling compliant USD access, not a consumer remittance app.

**[Diameter Pay](/startup/diameter-pay)** announced a **$10 million** Series A on **September 3, 2026**, co-led by **CMT Digital** and **Lightspeed Faction** (company PR; The Block). Valuation was not disclosed. CEO David Lighton told The Block the equity closed in **July** after a process that started in April — and that this was the company’s **first outside round** after bootstrapping.

**Spine:** correspondent banks pulled back from entire corridors; stablecoins move dollar *value* 24/7 — but institutions still need regulated, screened connectivity into U.S. accounts. Diameter sells that bridge as an API, not a consumer wallet.

## Key facts

| Field | Detail |
| --- | --- |
| Company | [Diameter Pay](/startup/diameter-pay) (ex-SendFriend) |
| Round | **$10M** Series A (equity; single tranche) |
| Co-leads | CMT Digital, Lightspeed Faction |
| Also in | SixThirty, Stellar Development Foundation, Tech Council Ventures, Onigiri, BitRock |
| Traction (company) | >**$10B** YTD 2026 volume; >**10,000** end users |
| Governance | CMT board seat; Lightspeed Faction + SixThirty observers; Robert Pozen senior advisor |

## Who uses the product — and for what job

**Users:** banks, fintechs, and digital-asset exchanges that need U.S. dollar virtual accounts, domestic/international rails, stablecoin on/off-ramps, and embedded compliance — Lighton pointed to clients from Switzerland to Singapore without naming logos.

**Job:** one API that combines account access + payment rails + stablecoin settlement + screening so regulated institutions can extend dollar services without rebuilding correspondent relationships corridor by corridor.

## Why now

- Stablecoin settlement volume rose while traditional correspondent coverage shrank under AML/sanctions pressure.
- Crypto-native remittance apps are the wrong buyer; **licensed institutions** need the compliance stack first.
- A bootstrapped firm claiming **$10B** YTD volume before a first institutional round is the anomaly — if the figure holds under diligence.

## Why CMT Digital and Lightspeed Faction

CMT Digital is a crypto/fintech specialist writing the board seat; Lightspeed Faction is Lightspeed’s digital-assets vehicle (not our [Lightspeed NYC](/fund/lightspeed-venture-partners-nyc) directory page — **do not conflate**). SixThirty adds fintech-risk context. The cap table reads as **trust and licensing** capital, not growth SaaS tourists.

*CMT Digital, Lightspeed Faction, SixThirty, and Stellar DF have no `/fund/` pages here.*

## Competitive map

| Approach | Tradeoff |
| --- | --- |
| Classic correspondent banking | Trusted; slow, corridor-fragile |
| Consumer remittance / neobank USD | Fast UX; thin institutional compliance story |
| Pure stablecoin issuers / on-ramps | Crypto-native; still need bank connectivity |
| Diameter institutional API | Compliance-first; volume claim unverified externally |

## What is not proven

- Valuation, take rate, and revenue.
- Share of volume that is stablecoin vs fiat rails.
- Named bank logos and concentration risk.
- Independence of the **$10B** figure beyond company disclosure.

## Practical takeaway

- **Founders (payments infra):** Lead with **risk tooling for banks**, not “stablecoins are the future.”
- **Investors:** Diligence volume quality, partner banks, and AML false-positive rates before treating $10B as ARR proxy.
- **Operators:** Relevant if you need USD accounts + stablecoin settlement under one compliance umbrella.

### Sources

1. [PR Newswire — Diameter Pay $10M](https://www.prnewswire.com/news-releases/diameter-pay-raises-10-million-to-expand-global-access-to-the-us-dollar-302869225.html)
2. [The Block — Diameter Pay](https://www.theblock.co/news/deals/2026-09-03-diameter-pay-funding-stablecoin-payments-infrastructure-413454)

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)

**Editorial note:** AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.