Important : This bank is an Internet-only bank in Korea and since banks don't allow foreigners to apply for an account online, You must be a Korean citizen to become their customer.

Kakao Bank of Korea(한국카카오은행, aka 카카오뱅크) is a Korean branchless bank run by Kakao Corp, one of the popular portal website service provider in South Korea.

The reason why they don't accept foreign resident customers : In summary, it's because of the govt policies. The Financial Services Commission in Korea conducted and regulated the online application system and its policies and guidelines, and all banks in Korea must follow them. The policies and guidelines may have some directions including what kind of information banks need to collect from their new customers and what kind ID cards are valid for the system. Currently, the policies and guidelines are regulated to be working with the only Korean citizens' identities. There are no guidelines for foreign residents, hence, the banks can't accept foreign residents customers online, even if they actually want to do. If you really want to change this problem, it'd be better to appeal to the FSC or other supervisory agencies, so that they can realise your inconvenience.
Category
인터넷전문은행(Internet-only bank)
KFTC Network ID
090
SWIFT Code / BIC
CITIKRSXKAK
Telephone number
1599-3333
Telephone number (Overseas)
82-2-6420-3333
Website
https://www.kakaobank.com/

수신/이체 관련 수수료(Basic banking fees/Local transfer fees)

Subject Fee Note
Monthly service fee Always free
Online, smartphone transfer to 한국카카오은행 account Always free It's always free regardless of account holders and branches.
Online, smartphone interbank transfer Always free
Automatic interbank transfer Always free

카드 관련 수수료(Card fees)

Subject Fee Note
Issuance of a check card Free for the first issuance, then 2,000 KRW

전신료(Telegraphic fee)

Channel Fee
  0 KRW

송금수수료(당발송금, Outgoing transfers fee)

Target Channel Corresponding amount of money Fee
0 USD ~ 5,000 USD 5,000 KRW
5,001 USD ~ 10,000 KRW

수취수수료(타발송금, Incoming transfers fee)

Target Channel Corresponding amount of money Fee
  5,000 KRW