Google Payment API - Enable an easy-to-use checkout experience for customers
Every.org - Give to any charity with friends - the easiest way to give!
Giftbit Payment API - Stripe for gift cards
Involve - Get behind-the-scenes access to your favorite nonprofits
Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
Support with Crypto - Bringing crypto donations to creators worldwide