The race for stablecoin banking is not about settlement. It's about who owns the user.

The headline number is dramatic on its face. Wirex, a London-based payments platform that spent its first decade selling crypto debit cards directly to consumers, says its banking-as-a-service line has reached roughly $2 billion in annualised card-spend volume. The figure was pushed there by July's $160 million in onchain card spend - up 28% from June - with monthly onchain transactions roughly 200 times January's level.

The timing catches the eye. Wirex BaaS launched in November 2025. It hit $1 billion in annualised volume in 131 days, which it frames as roughly twice as fast as RedotPay's prior 276-day record. Then in another 110 days it says it nearly doubled that run-rate to $2 billion.

Speed is a convenient headline. The story behind the numbers is about a fight over which layer of the payments stack will collect the rent as stablecoins move from crypto trading to everyday banking.

What Wirex is actually selling

Wirex BaaS is not a consumer product. It is infrastructure that other companies plug into. A fintech, a crypto wallet, or a neobank integrates Wirex through a single API and gains access to co-branded Visa or Mastercard cards, multi-currency IBANs, cross-border payouts, embedded yield, and cashback-as-a-service. Wirex says the average integration takes 44 days, compared with the 6–12 months partners say other providers take. More than 300 potential and existing partners are now in various stages of integration.

The thing that makes Wirex's offering unusual in this market is that it is a principal member of both Visa and Mastercard. Wirex secured Mastercard principal membership in 2020 and Visa principal membership later that year. Principal membership means it issues cards directly through the card networks - there is no sponsor bank sitting in the middle. The company keeps the interchange fee and the foreign-exchange spread rather than splitting them with a traditional bank partner. That structural advantage is what drew other builders to its door instead of the other way around.

It also settles in both USDC and EURC, not just USDC. If a European cardholder spends euros and the programme only settles in USDC, there is a 2–3% FX conversion cost on every transaction. Multi-currency stablecoin settlement eliminates that drag. For a partner targeting European users, the difference is the gap between a product that works on paper and one that actually saves money.

The layer war

The larger context is that the biggest names in payments are already building stablecoin plumbing from below. Visa's stablecoin settlement run-rate more than doubled to about $7 billion annualised by March 2026. Mastercard added support for several stablecoins across multiple networks in June 2026 and agreed to acquire the on-ramp specialist BVNK for up to $1.8 billion. Stripe integrated stablecoin acceptance through its Bridge acquisition.

All three are strengthening settlement: the back-end rail that moves money between participants after a transaction is authorised. Settlement is essential but it is not the most profitable layer of the stack.

That is where Wirex is positioning itself. Wirex co-founder Pavel Matveev put it plainly in a July interview: "There are plenty more parts of the system which allow the stablecoin industry to operate, and it's impossible for Visa and Mastercard to own them all. Even in the traditional financial system, they've never chosen to become card issuers."

Payment networks connect institutions and merchants. Issuers, fintech platforms, and neobanks control the accounts, cards, and interfaces customers use daily - and they earn interchange, FX margins, programme fees, and revenue from products linked to user balances. Wirex is building the customer-facing layer and selling it wholesale to the companies that want to own their own user base.

That distinction matters. In the old banking-as-a-service cycle, fintechs raced to acquire users while renting licence infrastructure from banks. Compliance became a shared problem, which in practice meant no single institution fully owned it. The stablecoin BaaS model is asking the same question but on different rails. Who sits between the onchain money and the end user?

How big is the underlying market?

The stablecoin ecosystem Wirex is riding has grown past the point of easy dismissal. USDT carries a market capitalisation of roughly $183 billion; USDC sits around $72 billion. By Artemis tracking, total stablecoin supply reached about $316 billion in July 2026, with daily transfers averaging $196 billion.

The vast majority of that volume is still crypto-to-crypto: traders moving between assets, treasuries parking liquidity, and capital-market flows that have nothing to do with consumer spending. But real-world stablecoin payments volume doubled to $400 billion in 2025, with about 60% estimated to be B2B, and non-USD stablecoin transfer volume has grown 16 times from 2023 to 2026. The GENIUS Act, signed in the summer of 2025, created the first federal regulatory framework for payment stablecoins in the US, following the EU's MiCA regulation from 2024. Regulatory clarity, combined with Visa and Mastercard now accepting stablecoin settlement, has turned what was once a fringe experiment into a legitimate infrastructure market.

That is the tailwind. The question is whether individual infrastructure providers can convert that tailwind into durable advantage, or whether they are building on a platform that card networks and big-tech payments firms will eventually bundle for free.

What to watch

Wirex's volume trajectory is impressive, and the fact that it is onchain - verifiable through third-party trackers like Payment Scan, rather than locked in an internal ledger - adds credibility that many card programmes cannot claim. But volume and unit economics are not the same thing, and Wirex has not disclosed active-user counts, average transaction size, or whether a small set of heavy spenders is driving disproportionate volume.

The bigger risk is structural. Visa, Mastercard, and Stripe are already moving up the stack. Stripe's Bridge acquisition was not just an on-ramp; it is a card product available in fewer than 100 countries. If any of these networks eventually offer card-issuing infrastructure alongside settlement, the middle layer that Wirex BaaS occupies could get squeezed.

Conversely, Wirex's principal memberships and multi-currency stablecoin settlement are not trivial moats. Principal membership is a regulatory and technical hurdle that most crypto-native companies cannot clear. And the company's claim that it can take a partner from contract to live product in roughly six weeks is a real advantage in a market where speed to launch is the closest thing to a defensible edge.

I'm more interested in what comes next than the current milestone numbers. The useful test is whether the partners building on Wirex BaaS are creating products that hold users, or whether the end consumers bounce back to exchanges and traditional neobanks the moment the novelty wears off. The stablecoin utility report from BVNK found that 77% of stablecoin holders would open a wallet if their bank or fintech app offered one - which suggests demand is there. But 71% also said they'd use a card to spend stablecoins, and merchant acceptance remains the critical blocker.

Wirex has answered the card-issuing side of that equation for its partners. The unanswered question is whether the merchants and everyday consumers on the other end of the transaction are ready for it. Until they are, this is infrastructure momentum - impressive, real, and still early.