“Financial infrastructure for the internet”
Category-defining statement, not a value proposition. "Financial infrastructure" tells the visitor *what Stripe is* (infrastructure) but not *what they get* (more revenue, fewer failed payments, faster integration). Cold visitors — especially non-technical founders evaluating Stripe vs. PayPal — can't articulate the benefit in 5 seconds.
“Accept payments in an afternoon. Scale to millions without switching providers.”
Names the speed (afternoon), the outcome (accept payments), and the long-term promise (scale without switching). Works for both the developer integrating today and the CFO evaluating long-term lock-in.