A. The two of them represent an online platform which welcomes transactions between vendors and buyers. The only variation involves the presence of users (buyers and sellers) and the way they act. On B2B e-commerce websites, there is usually only one vendor facing a large number of buyers. Alibaba, IndiaMart are some examples of B2B e-commerce websites. B2B marketplaces have many sellers and many buyers. The best example for it is Amazon Business. A buyer could connect to a completely new vendor through each transaction.