With 93% of South Korea's population using KakaoTalk on their smartphones, Kakao Corp.

KakaoTalk, a free mobile messenger application for smartphones, revealed its first profits of $42 million in 2012 and $200 million in revenue for 2013. After subscribing to 'KakaoTalk Wallet', users can purchase the ticket through their own payment. 'Emoticon Plus' is a service that allows unlimited use of Kakao's selected collection of emoticons for ₩3,900 per month. On January 13, 2021, KakaoTalk released an emoticon monthly fixed-rate service. Users can also purchase real-life goods through the messenger's 'Gifting' platform. Through the 'Plus Friend' feature, users can follow brands, media and celebrities to receive exclusive messages, coupons and other real-time information through KakaoTalk chatrooms. KakaoTalk began as a messenger service but has become a platform for the distribution of various third-party content and apps, including hundreds of games, which users can download and play with their friends through the messaging platform.

The KakaoTalk service also allows its users to export their messages and save them. Users can also search for friends by KakaoTalk ID without having to know their phone numbers.

The app automatically synchronizes the user’s contact list on their smartphones with the contact list on the app to find friends who are on the service. Both one-on-one and group chats are available over WiFi, 3G or LTE, and there are no limits to the number of people on a group chat. In addition to free calls and messages, users can share photos, videos, voice messages, location, URL links as well as contact information.

Kakaotalk store late