As Amazon took off here in the US, another similar startup business took its sights on the Far East. Alibaba may look similar to AMZN but under the hood they are very different. While AMZN handily beats BABA on top-line, BABA wins by a large measure on opex margins. This is inherent in their business model which is more similar to Ebay than to AMZN. Whereas AMZN primarily owns warehouses and inventory, BABA is lighter and collects a merchant fee as a middleman between buyers and sellers.