What is the name of Amazon's platform for third-party sellers?

Amazon’s platform for third-party sellers is called Amazon Marketplace.

Amazon Marketplace allows independent businesses and individuals to list products alongside items sold directly by Amazon. Sellers can offer new or used goods, while customers typically encounter both Amazon-owned inventory and third-party offers on the same product pages. Amazon earns revenue through fees such as referral charges on completed sales.

Marketplace sellers can handle shipping and customer service themselves, a model known as Fulfilled by Merchant. Alternatively, they can use Fulfillment by Amazon, or FBA, in which Amazon stores inventory, picks and packs orders, ships products, and manages returns and customer support under the program’s terms.

Amazon Marketplace is different from Amazon Web Services, the company’s cloud-computing division, and Amazon Fresh, its grocery service. Amazon Business is a separate buying environment aimed at organizational customers.