Xiaomi Corporation, commonly known as Xiaomi and registered as Xiaomi Inc., is a Chinese designer and manufacturer of consumer electronics and related software, home appliances, automobiles and household hardware. It is the second-largest manufacturer of smartphones in the world, behind Samsung, most of which run on the MIUI operating system, which is based on the Android operating system. The company is ranked 338th and is the youngest company on the Fortune Global 500.

MIUI is a deprecated mobile operating system by Xiaomi for its smartphones and devices, from 2010 to 2023, prior to the launch of its successor Xiaomi HyperOS.