Threema is the top-selling secure instant messenger. More than
12 million users in Europe and beyond have put their trust in the Swiss
service provider. Threema has been designed with data privacy and data
reduction in mind. Three million users, spanning across 8,000 companies, public authorities, schools, and organizations, have opted for the business solution Threema Work and Threema OnPrem. Well-known corporations, such as MercedesBenz Group, Rossmann, and TK Elevator, use Threema Work as an internal messenger. Moreover, many small and medium-sized companies and official institutions (such as ADAC, the Swiss federal administration, and Rotterdam’s Erasmus University) use the Swiss service.