Swell.is - Customizable, API-first ecommerce platform for innovative brands, startups, and agencies.
Squarespace Start - Build a simple website right from your mobile phone.
Shopify - Shopify is a powerful ecommerce platform that includes everything you need to create an online store and sell online. Try it free for 14 days.
Softr - From zero to a website in 5 mins, using building blocks.
Vendure - Open-source headless e-commerce framework for developers
GoCentral from GoDaddy - Mobile friendly website/store builder with marketing tools