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.
Swell.is - Customizable, API-first ecommerce platform for innovative brands, startups, and agencies.
Tailry - Unlimited Shopify management for one flat monthly fee.
Krepling Beta - All-in-1, no-code commerce solution for SMBs & entrepreneurs
Vendasta Technologies - Vendasta is an agency in a box with white label platform, marketing automation and more. Details in here: https://www.vendasta.com/pricing
LiveMart - Headless GraphQL ecommerce API for global brands