Stripe Billing - A set of tools for billing and subscriptions
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
Recurring Payments - No need to create invoices. No need to remind clients to pay
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.
Braintree - An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.
BILL Spend & Expense - BILL Spend & Expense (formerly Divvy) is a fully-automated expense management software.