Link is a one-click checkout product operated by 📝Stripe that lets customers save payment and shipping details once and autofill them across any Link-enabled merchant. Launched in the early 2020s as part of Stripe's payments stack, it sits inside the company's Optimized Checkout Suite and processes transactions for hundreds of thousands of merchants globally.

Link's mechanism turns the network effects of payment data into a competitive moat. A first-time customer at any Link-enabled merchant enrolls once with their payment and shipping info; on subsequent purchases anywhere on the Link network, those fields autofill — reportedly cutting checkout time from around 45 seconds to under 10. The product qualifies merchants for SAQ A compliance by handling sensitive card data in Link's own vault rather than the merchant's, and mobile users get biometric authentication via Face ID and Touch ID.

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