애플리케이션을 사용하려면 구글 워크스페이스(G Suite) 계정이 필요한가요, 아니면 개인 Gmail 계정으로도 사용할 수 있나요?

No, a Google Workspace (G Suite) account is not required to use Shared Contacts Manager. You can sign up with an individual Gmail account if your team doesn’t have Google Workspace. However, the application is most effective in a business environment.