Drupal 7

With over 7,000 modules, including the Shopify API and the popular 'Commerce' set of modules, Drupal version 7 is by far the most stable and scalable platform to build a web system with today. This release of Drupal will be supported with security releases through at least 2020, and has an excellent migration path to Drupal 8.

If you are looking to build a state of the art e-commerce site, Drupal 7 is the industries most efficient platform to customize your company's brand.