Kaihua Kailh Switch
Kailh switch is a Cherry MX compatible switch, made by Chinese company “Kaihua Electronics Co., Ltd.”. (凯华).
Kaihua makes many types of switches, for keyboard, mouse, and other industrial applications.
Kailh KT Switch series
The most common one is what they call KT Switch (KT standard for Traditional). These are Cherry MX compatible switches.
Kailh KS Switch
Kailh KH Switch
Kailh Box Switch
Kailh Box Switches are improved Cherry MX compatible switches.
Kailh Choc Switch
Kailh Choc is low-profile switches.
Kailh vs Cherry MX
Keyboards Using Kailh KT Switches
Here's a sample list of keyboards using KT switch.
Keyboards Using Kailh KT Switch in 2015
The following are just list of early adopters from 2015.
Steelseries, Mad Catz, and others.