1
StripeDeveloper-first payments infrastructure
Stripe is the leading developer-focused payments platform, with clean APIs, global coverage, and a deep product suite (billing, invoicing, Connect). The default choice for SaaS and modern stores.
2
SquareUnified online + in-person payments
Square shines for businesses selling both online and in person, with free POS hardware/software, flat fees, and an all-in-one ecosystem for retail and food.
3
AdyenEnterprise global payments platform
Adyen is a single platform for global enterprise payments across online, in-app, and in-store, with interchange++ pricing and powerful data. Built for scale, not small shops.
4
PayPalThe most recognized checkout button
PayPal is the most widely trusted consumer payment brand, offering instant buyer recognition, Pay-in-4, and easy setup. Great for conversion, though fees run higher.
5
BraintreePayPal-owned gateway for growing platforms
Braintree (a PayPal company) is a full-stack payment gateway with strong support for cards, PayPal, Venmo, and marketplaces — a developer-friendly middle ground.