Kakao Corporation is a South Korean internet conglomerate headquartered in Jeju City. It was formed through the merger of Daum Communications and the original Kakao Inc. in 2010. The company was renamed Daum Kakao in 2014. In 2015, it was rebranded once more, reverting simply to Kakao. The KakaoTalk messaging app dominates in South Korea, and after launching in March 2010, the service gained around 90% of domestic market share in 2015. Wikipedia