Teller isn't part of the PSD2/Open Banking world. They've reversed engineered all the bank's private APIs for their mobile apps, in part because they believe th

Teller isn't part of the PSD2/Open Banking world. They've reversed engineered all the bank's private APIs for their mobile apps, in part because they believe the banks will hobble and cripple the Open Banking APIs because it's in competition with their business model.