Invitation-only premium credit cards would likely have the highest credit limits compared to those offered to the public. However, to the general public, the Amex Platinum card and Amex Gold card are known for having one of the highest spending limits among personal cards. Business credit cards generally have higher limits than personal cards. On the business side, the Amex Business Platinum card, Amex Business Gold card, Ink Business Preferred card, and Capital One Spark Cash Plus card are all options that offer either high credit limits or no preset spending limit at all.