Retail banking is undergoing radical change. New players in the market and changes in the regulatory framework (e.g. PSD 2) mean that the market is being opened up as a result of market conditions and regulations, posing new challenges for traditional banks. Customer behaviour has also changed decisively. The willingness of customers to change accounts has doubled in the last four years, with the absolute number of accounts in the German market remaining constant over this period. The traditional instruments of financial institutions currently offer hardly any opportunities to react to the effects of this change.