Which banks make their own cards? Monzo just needs to switch manufacturer if the current isn’t up to quality.
My bank cards identify the following manufacturers of my cards.
RBS use GyD Ibérica.
Barclays use Gemalto.
Curve use Gemmalto.
Monzo use Tag Systems (and another? I’m sure they use two).
Coinbase use Thames Card Technology.
N26 use exceet Card Group.
Co-op use IDEMIA.
Smile use IDEMIA.
Starling use Tag Systems.
mbna use IDEMIA.
Bunq use Future Card Industries.
American Express uses IDEMIA.
Tandem use IDEMIA.
Monese use Thames Card Technology.
Glint use Thames Card Technology.
Revolut use allpay.cards.