The Chinese e-commerce company founded by Jack Ma is Alibaba.
Alibaba began on June 28, 1999, when Jack Ma and a group of friends and students founded Alibaba.com in Ma’s apartment in Hangzhou, China. The original business was a business-to-business marketplace designed to connect Chinese suppliers with buyers around the world.
The Alibaba Group later expanded far beyond its original marketplace. Its ecosystem came to include consumer platforms such as Taobao and Tmall, the payment service Alipay, the cloud-computing division Alibaba Cloud, and international services including AliExpress. This makes “Alibaba” a company group as well as a name associated with its original B2B website.
A common confusion is treating Alibaba as the same service as Taobao. Taobao is a consumer marketplace owned by Alibaba Group, while Alibaba.com primarily connects businesses and wholesalers. JD.com, Baidu, and Tencent are major Chinese technology companies, but none is the company founded by Jack Ma described here.