Cash App - The easy way to send, spend, bank, and invest.

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.

Facebook Pay - Send money to your friends via Messenger

Open.money - Open is a connected banking platform for business payments that simplifies the process of sending, receiving, and reconciling payments for businesses.

PayPal.Me - Request money using your own personalized URL.

Stripe iOS SDK - Accept both Apple Pay and credit card payments easily on iOS