Coway Co., Ltd. is an international manufacturer of household appliances, water purifiers, air purifiers, bidets, water softeners, and mattresses from South Korea. Founded and headquartered in Seoul, Coway is the largest water purifier company in the country and owns subsidiaries in Malaysia, the United States, Thailand, Indonesia, Vietnam, Europe, Japan, and China. The company is listed on the Korea Exchange and is a subsidiary of Netmarble since 2019. Recently, Coway is also focusing on the bedding products, such as mattresses. Wikipedia