Square eCom is Square (Block)'s e-commerce payment solution, founded in 2009 in San Francisco. It provides online payment processing, subscription billing, and multi-currency capabilities sharing one payment system with Square POS.
Sellfy, founded in 2012 and headquartered in Lithuania, is a creator-focused ecommerce platform for digital products and print-on-demand with flat fees of $19-$59/month and 0% transaction fees on higher plans.
Founded in 2012 and headquartered in Melbourne, Australia, Pin Payments is a developer payment API provider for the AU/NZ market, with flat pricing of 2.5% + $0.30 per transaction, known for its simple REST API and transparent pricing.