Magento it’s an open source for eCommerce. Now we have over 25K websites who use magento. For entire list click here.
WooCommerce it’s a WordPress plugin which e-commerce functionality for wordpress websites. Regarding our question, now we have indexed over 128K websites which uses WooCommerce. Here you can find all.
There are many ways to make a market research, but today I will tell you how you can do this by Internet.
You can find all list here: All Drupal websites