The Threema for DSGVO and security says
Threema is a Messenger service for Smartphones. The provider emphasises on its Website that it the users more safety features than other Messenger SIMSme, Telegram, Signal and Wire or WhatsApp.
- Threema can be used anonymously without mobile number and without the Upload of the phone book is used.
- By this security the Messenger is also available for young people under the age of 16 usable.
- Threema protects the rights of Internet users and advertises in order to protect the privacy.

So be sure the provider is really
Conventional Messenger services to access the contacts in the phone. That's why these are only recommended for private use. As soon as you save business data on your Smartphone, you should note which data will be read.
- If you store your contacts in the phone, it is no longer a purely private use.
- The use of conventional Messenger for business communication is a violation of the DSGVO.
- Details of the location, cellular network, or the contact details may not be read out loud DSGVO at professional Messenger services. Threema does not collect this data.
Threema use professionally
The safety standards of all of the things are so comprehensive that the Messenger service security for service phones. However, it is offered for companies, the special App "Threema Work".
- In order to meet the requirements of the DSGVO, were Threema no adjustments necessary.
- The Messenger pays special attention to the protection of personal data, company data and the privacy of all participants.
