Card Networks Erode Rain's Moat
Rain
Rain is shifting from owning a hard technical bottleneck to competing inside a stack that bigger networks are starting to absorb. Rain originally mattered because it let a company hold stablecoins, authorize a normal card swipe, then handle the messy conversion and settlement into merchant fiat behind the scenes. As Visa, Mastercard, and Stripe build those rails into their own infrastructure, the scarce part moves away from conversion plumbing and toward distribution, compliance, card program management, and software workflows layered on top.
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Rain built deep vertical integration early, including authorization, settlement, and issuing against custodial and non custodial stablecoin balances. That mattered when stablecoin cards required custom plumbing. It matters less if network level settlement becomes standard and fintechs can buy similar capability from larger platforms through one API.
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Visa now supports USDC settlement in the U.S. with bank participants settling over Solana, and Mastercard has rolled out merchant settlement and programmable payment capabilities through its stablecoin and Multi Token Network products. That means the card networks themselves are turning stablecoin settlement into network infrastructure, not a specialist edge case.
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Stripe pushes the same compression from the processor layer. After completing the Bridge acquisition, it launched Open Issuance so platforms can launch their own stablecoins, then connect those balances to wallets, onramps, offramps, and cards. That gives mainstream processors a white label path into features Rain once had to build from scratch.
The next phase favors companies that own customer workflows, not just money movement conversion. Rain is best positioned where it turns stablecoin balances into a full spend stack for platforms and global businesses, with controls, treasury logic, and embedded card products that are painful to replace even after the settlement rail itself becomes a commodity.