HitPay - Send or receive money using a modern payments interface
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.
ZELF - Instant money in messengers
Wirize - Payment checkout for freelancers
Unlock - Monetize your content with a few lines of code
Giftbit Payment API - Stripe for gift cards