Rain's Self-Custody Advantage Over Exchanges

The real threat is not another card startup, it is the exchange or custodian that already holds a companys money and can turn that balance into spending, payouts, and treasury workflows in one step. Rain wins by letting companies keep assets in self custody and spend without off ramping, but an incumbent like Kraken can bundle custody, trading, payments, and compliance into a single operating account for institutions already on platform.

• Rain was built for teams with on chain revenue that could not easily use banks or even open accounts with major exchanges. Its product creates a smart contract owned by the customer, uses posted stablecoins as collateral for a credit line, and monetizes through interchange plus subscription fees.
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• That self custody design is also Rains biggest contrast with custodians and exchanges. Customers can verify collateral on chain and repay from wallet, ACH, wire, or check. A custodian competitor instead starts from assets already under management, so it can add cards, bill pay, and treasury views without asking finance teams to adopt a new asset setup.
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• The prize is getting bigger because stablecoins are becoming a real payments rail, especially for cross border treasury and payouts. At the same time, large exchanges are moving beyond trading. Kraken describes payments and custody as core non trading revenue streams, and its strategy is to build apps and services on top of exchange liquidity with an emphasis on B2B payments and money movement via stablecoins.
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Over time, the market is likely to split between integrated financial hubs and specialist infrastructure. Exchanges and custodians will push from stored assets into spend management and payments. Rain is positioned to stay relevant by becoming the interoperability layer that works across self custodial wallets, fiat rails, and many stablecoins, even when the asset balance starts somewhere else.