At 12:00 UTC on October 16, 2026, Marqeta announced a Coinbase collaboration that will add stablecoin custody, fiat conversion, and Base settlement to its card issuing platform. Marqeta, which processed nearly $400 billion in payments during 2025, described the arrangement as a planned expansion of an existing relationship rather than a live card program.
The companies are dividing the payment stack between crypto infrastructure and card infrastructure. Coinbase will custody stablecoin balances and convert digital assets into fiat. Base will provide the on-chain settlement layer. Marqeta will issue and process the cards while managing bank and card network relationships.
That division gives Marqeta customers one integration for the crypto and card sides of a program. The target customers include crypto-native companies and firms that do not otherwise operate crypto infrastructure. Marqeta says those businesses will be able to issue stablecoin-backed cards, fund programs 24/7, and let cardholders spend stablecoin balances at millions of merchants that accept cards globally.
How a payment would move
The announcement assigns custody and conversion to Coinbase. A cardholder’s stablecoins would remain within Coinbase’s infrastructure until a purchase requires conversion into fiat. Marqeta would handle authorization and processing through the conventional card system. The release does not name a stablecoin, card network, issuing bank, or supported country for the first customer program.
Base sits between those functions as the settlement network. Marqeta calls the expected settlement fast and low cost, but the release gives no fee schedule or settlement target. It also does not specify whether every transaction would settle individually on Base or whether programs could aggregate obligations before an on-chain transfer. Those details matter to operators because they determine transaction costs, reconciliation requirements, and how much liquidity a program must keep available.
Coinbase and Marqeta already work together on crypto-backed cards. The new arrangement broadens that relationship to Marqeta’s enterprise customers and makes Coinbase an infrastructure provider behind cards carrying another company’s brand. Alec Lovett, Coinbase’s head of infrastructure products, said the companies plan to combine Coinbase stablecoin rails with Marqeta issuing and processing for real-time global transactions.
The design also separates user spending from merchant acceptance. A merchant would receive a normal card payment rather than accept a stablecoin directly. The cardholder can draw from a stablecoin balance, while Coinbase performs conversion and Marqeta routes the purchase through its bank and network partners. That removes the need for each merchant to add a wallet or choose which stablecoins to accept.
A second stablecoin infrastructure route
The Coinbase deal follows a September 9 partnership between Marqeta and BVNK. That earlier arrangement also covers stablecoin-backed cards for crypto and non-crypto companies. BVNK was assigned stablecoin movement and management, while Marqeta retained card issuance, acceptance, and bank and network relationships.
The two announcements show that Marqeta is assembling stablecoin card infrastructure through multiple providers. BVNK reported more than $39 billion in annualized payment volume when that partnership was announced. Marqeta said BVNK’s infrastructure had become part of Mastercard after an August 2026 acquisition, and it described a path to additional Mastercard capabilities through the same integration. The Coinbase announcement instead identifies Base as the on-chain settlement layer and Coinbase as the custodian and converter.
A customer evaluating the options would need details that neither announcement supplies. Marqeta has not published how it will allocate customers between Coinbase and BVNK, whether the integrations support different stablecoins or regions, or whether one customer can use both. The announcements also do not compare custody terms, conversion spreads, settlement fees, or reserve management.
Demand cited for the earlier partnership came from a BVNK survey. It found that 77% of surveyed crypto holders would open a stablecoin wallet through their primary bank or fintech app if one were available. That result measures stated demand among crypto holders, not adoption by Marqeta customers. It does explain why the card issuer is building a route for financial apps to add stablecoin balances without operating the blockchain infrastructure themselves.
What changes for operators and cardholders
For program operators, Coinbase takes responsibility for two functions that otherwise require separate vendors or an internal build: custody and conversion. Marqeta keeps the parts tied to card issuance, processing, sponsor banks, and networks. The operating boundary is clear at the company level, but the release does not explain responsibility for failed conversions, delayed Base settlement, chargebacks, or a stablecoin losing its peg. Contracts and program documentation will need to assign those risks before funds move.
The 24/7 funding claim matters for treasury operations. A program that can receive stablecoins outside banking hours may replenish card funding when conventional transfers are unavailable. The announcement does not say whether converted fiat reaches the card program immediately, whether Coinbase or a bank prefunds authorizations, or what happens during Base congestion. Operators therefore cannot compare the promised availability with the cutoff times and liquidity rules of an existing card program.
For cardholders, the practical change is access to card acceptance from a stablecoin balance. The arrangement does not make merchants settle on Base or hold stablecoins. It turns the balance into fiat within the payment flow and uses existing card acceptance. Users still need disclosure on conversion rates, fees, custody protections, supported assets, and when their stablecoin balance is debited.
Marqeta is certified to operate in more than 40 countries, but that corporate footprint does not establish where Coinbase-backed cards will launch. The October 16 release gives no first customer, availability date, supported jurisdiction, or production milestone. The next verifiable milestone will be a named program with terms that show which stablecoin, network, issuer, and settlement process customers will actually use.
