From large corporations to small businesses, IT systems, software, and social media have become indispensable for companies. They are dependent on digital services provided by only a few IT corporations, e. g., Google, Amazon, Facebook, Apple, or Microsoft (GAFAM). 85 % of companies in Germany use Microsoft’s Office software, another 9 % use Google’s – only 2 % use the open alternative Libre Office. The text discusses how this monopolisation trend endangers a sustainable digitalisation and proposes better alternatives and solutions.