Threema Versions: Threema Work and Threema OnPrem
The Threema and Threema Work apps are compatible and basically do not differ in functionality. Both are compliant with the EU General Data Protection Regulation (GDPR). Threema OnPrem is Threema Work's self-hosting solution. When using Threema OnPrem, all data is stored on the company's own servers, which means complete data sovereignty and the highest level of security.