Wirize - Payment checkout for freelancers
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.
ACH payments with Stripe - Accept bank payments with a few lines of code.
Open.money - Open is a connected banking platform for business payments that simplifies the process of sending, receiving, and reconciling payments for businesses.
Giftbit Payment API - Stripe for gift cards
Razorpay - Payment gateway solution for India with robust, developer friendly API and simple economic pricing.