Marqeta Adds Coinbase and Base to its Stablecoin Card Stack
Marqeta has signed Coinbase as a partner for stablecoin-backed cards, the second such deal the card issuer has struck in five weeks and a sign that it intends to support stablecoin card programmes across competing infrastructure rather than betting on one rail. Announced on 16 October 2026, the collaboration puts Coinbase in charge of custody and fiat conversion, with settlement running on Base, Coinbase's Ethereum layer-2 network, while Marqeta handles card issuance, processing and the bank and network relationships. For enterprise customers, the practical result is the ability to let cardholders spend from a stablecoin balance at any of the millions of merchants that already accept cards.
What are Marqeta and Coinbase actually building?
The two companies are not starting from scratch. Marqeta already issues the Coinbase Card, the Visa debit card that lets Coinbase users spend crypto balances, so the new arrangement extends an existing issuing relationship into stablecoins specifically. Under the deal, Coinbase holds the stablecoin balances, manages the conversion between digital assets and fiat at the point of sale, and uses Base to settle transactions at low cost. Marqeta issues the cards and runs the payment processing. Businesses can fund their card programmes around the clock rather than only within banking hours, which matters for treasury and payout use cases that do not stop at 5pm.
Scale is the reason an enterprise would put Marqeta at the issuing layer. The company reported nearly $400bn in annual payments volume in 2025 and says it is certified to operate in more than 40 countries.
Why is Marqeta running two stablecoin card deals at once?
This is the part the announcement understates. On 9 September 2026, Marqeta unveiled a near-identical partnership with BVNK, the stablecoin infrastructure firm that Mastercard acquired for up to $1.8bn in August. That deal routes through Mastercard's network and the Open USD standard, a bank- and network-backed stablecoin that more than 200 companies have signed up to support. The Coinbase deal routes through Base and Coinbase custody instead.
Running both, barely a month apart, tells you what Marqeta is doing: positioning itself as the issuing and processing layer that works whichever stablecoin rail an enterprise chooses, and whichever standard eventually wins. The release's own phrasing, that Marqeta will deliver stablecoin-backed cards "through an ecosystem of partners", is the tell.
The timing also reflects a market still sorting out its plumbing. Visa began hunting for a new stablecoin settlement partner after Mastercard took BVNK off the board, according to industry reporting, and Coinbase itself is among the backers of Open USD even as it builds a separate Base-settled route with Marqeta. For a card issuer, staying neutral across those camps is a defensible commercial position.
How big is the stablecoin payments shift?
Big enough that incumbents are rearranging around it. The total stablecoin market sat at roughly $304bn at the end of September 2026, down from a peak above $320bn in May, yet the payments signal runs ahead of the supply figure: identified stablecoin payments topped $401bn in the first eight months of 2026, up about 42% year on year, according to figures compiled in Rise's Q3 2026 Stablecoin Trends Report. Visa reported an annualised stablecoin settlement run-rate of about $4.5bn by January 2026.
Regulation has caught up enough to make the category workable for mainstream firms. The GENIUS Act, the first US federal framework for payment stablecoins, was signed in July 2025, with final implementing rules due in 2026 and enforcement scheduled from January 2027. That clarity is why Marqeta, Mastercard, Visa and Coinbase are competing to own pieces of the stack rather than watching from the sidelines.
Why This Matters to FinanceX Readers
For finance teams, stablecoin-backed cards turn an on-chain balance into everyday spending power without a separate off-ramp, and the round-the-clock funding model suits payouts, treasury and cross-border programmes that fiat rails slow down. For investors, the more useful read is strategic: Marqeta is monetising the stablecoin shift as a neutral issuing layer, taking a cut whichever rail and standard prevail, which lowers its exposure to any single bet. The test now is whether these partnerships convert into named, live enterprise programmes with disclosed volumes, rather than framework agreements.
