The eCommerce business is not limited to the websites where a company sells to its customers (or when the company sells to another company when we talk about B2B). There is also a wide market of marketplaces where the owner of the marketplace handles marketing and platform management and sellers are entering the market with their offers using the marketplace platform.
An excellent example of a marketplace is Amazon. Besides, offering their products and services Amazon allows businesses to sell their products through the Amazon interface.
If you don’t have many products to offer, building a marketplace might be an option. Learn how to develop a marketplace website from an article at Aimprosoft.