Different organizations have different requirements, so they choose different solutions. Threema Work is used by the Swiss government, Bosch, Daimler and others

Different organizations have different requirements, so they choose different solutions. Threema Work is used by the Swiss government, Bosch, Daimler and others. Threema and Matrix are quite different. Matrix is a centralized / federated system where data is stored on the server. Threema uses a decentralized protocol, where data and metadata (including groups) are stored on the devices only. This has advantages and disadvantages, depending on your requirements.