ISI MARKETING INTERNATIONAL ISI has stood for successful B2B marketing for 35 years. Originally, our focus lay in direct telemarketing; but our offered services have since continuously expanded. Not only did our tasks and assignments increase, but the number of our staff as well. Our workspace became a little limited, and ISI established branches along the Rhine and Ruhr, as well as in the Netherlands and Curacao. In the meantime, we have firmly established ourselves in the online-marketing department. Our newest division, ISI Teletrade in Manila (Philippines), develops unbeatable company websites.