WooCommerce is an open-source, fully customizable eCommerce platform built on WordPress - perfect for those who love to tinker, innovate and do-it-themselves.
Flexible, community-driven, modular and customizable - with hundreds of extensions and integrations available in the WooCommerce.com marketplace - WooCommerce is for open eCommerce.
Snipcart is a developer-centric, flexible e-commerce solution. After injecting a snippet of JS to your project, you can define products directly in your HTML. All of your e-commerce logic can effectively be handled in the frontend, which makes it easy to integrate in web apps, static sites, or even old school CMS.
Magento Commerce was just acquired by Adobe for $1.68 Billion, built to power the next generation of ecommerce companies.