Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
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
Shippable - Add continuous integration and deployment to your GitHub repositories in a few minutes.
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.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Braintree - An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.