LetterNote - Fine Stationery, Art Prints, Accessories & Collectibles

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.

PencilCase - Transform your designs into native iOS apps in a heartbeat.

Solo - Personal kanban boards hosted on your own server

Nicely Noted - Subscription service for beautiful greeting cards and stamps

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