WooCommerce is a WordPress plugin that is primarily used for selling products or services online. Regardless if your products are digital or physical, WooCommerce makes it easy to build an online store that is customized specifically to your business needs. WooCommerce also makes it easy to manage your inventory, take secure payments, manage shipping, and will even apply taxes accordingly.
BigCommerce is most easily compared to Shopify. Both platforms offer a similar experience when building an ecommerce platform. Like Shopify, BigCommerce offers a range of prices and packages tailored to different types of businesses. The platform is highly customizable if you are comfortable with some light coding. It is also possible to use themes and templates to build your website, but some of these will come at an additional cost.