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.

PayPal - PayPal is the faster, safer way to pay online without sharing financial details, send and receive money or accept credit and debit cards as a seller

UniPayGateway - Ultimate payment gateway software for merchants, ISOs and PSPs. Full range of payment gateway capabilities. Functionality rich open source payment system.

Zuora - Zuora creates cloud-based software on a subscription basis that enables any company in any industry to successfully launch, manage, and transform into a subscription business.

Payoneer - Whether making international payments, receiving funds, managing your digital business, or accessing capital, Payoneer opens your business up to the world.

Braintree - An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.