What is the difference between eCommerce Marketplace and Platform?

There are two platforms to launch products online: an e-commerce website and an online marketplace. You can choose any to sell your products; there are some basic differences between the two. However, both are used to sell products online. The online marketplace includes multiple shoppers and retailers, as they facilitate selling goods/services directly to a previously established customer base. An eCommerce website essentially is nothing but a web store of a single seller where inventory is owned by the website owner only.