BigCommerce is a privately held technology company that develops e-commerce software for businesses.Bigcommerce is a paid-for hosted e-commerce solution that allows business owners to set up an online store and sell their products online. It's a software as a service (Saas) product, which means that you don't own the software, but pay a monthly fee to use it.
The product is aimed primarily at people without much in the way of web design skills, but it also allows more tech users and developers to tweak the HTML and CSS of their online stores too.