Google Payment API - Enable an easy-to-use checkout experience for customers

Gemnote - Handwritten cards & premium custom gifts for companies

Giftbit Payment API - Stripe for gift cards

Snappy Gifts - Send the perfect gift in a Snap! They choose what they love💜

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.

Greetabl - Beautiful greetings for when a card is not enough.