Expensify - Import expenses directly from a credit card to create free expense reports quickly. Approve reports online and reimburse directly to a checking account with one click.

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.

Abacus - Expenses without the 'expense report'

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

Rydoo - Rydoo is a Travel and Expense management system.

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