Stripe dominates online checkout, but churn comes from four directions: PayPal's buyer trust, Square's in-person hardware, Adyen's enterprise scale, and Braintree's PayPal-backed simplicity. The split is online versus in-person versus enterprise — pick the axis you sell on.
All listed options are tested picks, and paid placements — when they exist — are always labeled Sponsored and never buy a ranking position. Compare effective rate at your volume and ticket size; headline percentages lie until payouts, disputes and FX are included.