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.

Magnus - Shazam for art

SuperPay - Get paid faster with your own custom payments page

Masterworks - Invest in the world’s most valuable paintings.

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

Artsy - A global platform for discovering and collecting art.