JCB Co., Ltd.

American Express holds roughly 10% in the US and under 5% in Europe.

Smaller players like Discover, JCB and Union Pay exist, but they don't come close to the scale or the moat these three have built.

And if you want to go deeper on this specific segment, Bauke wrote a full deep dive on card networks last year, specifically Visa.

Available on the TDI terminal and definitely worth your time.

Yeah, different schemes obviously vary.

So if you're accepting kind of Amex, it is going to be different, JCB, union pay, etc.

And also different refund kind of processes and being aware of that.

So don't feel stupid if you're on a call asking those kind of questions.