Alibaba Group Holding Limited specializes in e-commerce, retail, Internet, and technology. The company provides consumer-to-consumer (C2C), business-to-consumer (B2C), and business-to-business (B2B) sales services via web portals, as well as electronic payment services, shopping search engines, and cloud computing services. The company hosts the largest B2B (Alibaba.com), C2C (Taobao), and B2C (Tmall) marketplaces in the world. Alibaba was founded in 1999 and is headquartered in Hangzhou, China.