The secret of ING's success is their dedication to service. It's actually very simple: they want their clients to be satisfied, because that recommends the . No power greater than sincere recommendation from a client. ING DIRECT is a company belonging to the ING Group, the largest financial institution in the Netherlands 1 and one of the largest in the world. In early 1999, the ING Group chose Spain to start your direct banking model in Europe, a true financial milestone when it raised a really different banking model, no commission, no fine print and operate exclusively over the telephone and internet.