kakaopay securities(카카오페이증권, Formerly 'Baro Investment & Securities', 바로투자증권) is a Korean brokerage firm.
Baro Investment & Securities was founded in 2008 and kakaopay acquired the company on 6th Feb 2020.
If you're a Korean citizen, you can open an account through kakaotalk application. Even if you're a foreign resident, you can open an account by visiting their offline branch. However, you can't manage the offline accounts in kakaotalk(or kakaopay) application, for now.