As soon as a message is delivered, the message itself, along with the related metadata, is deleted from the servers.

Anything that does get stored on company servers (messages in transit for example, or metadata needed to route those messages) is there temporarily. With full-time E2E encryption and the absolute minimum of unencrypted data ever reaching the company servers, this is definitely a secure messaging app. Since 2016, the company has released several versions of Threema aimed at different markets. Although they released the first version of Threema in December 2012, they didn't formally found the company until 2014. Threema GmbH, a small, Swiss company, publishes Threema. This is a big difference from Signal and Telegram, as we noted in our Signal review. Because you don't need to enter your phone number or email address when creating a Threema account, you can use the service completely anonymously. Threema also lets you conduct polls, have private chats that are protected by a PIN or fingerprint, verify contacts to prevent man-in-the-middle attacks, and quote text messages.

Everything is end-to-end encrypted, including the items you share. It offers text and voice messages, voice and video calls, groups and distribution lists, and the ability to share files, media, and locations. Threema is easy to use and has the full range of features you would expect from a secure messenger app. In this Threema review we'll show you everything this secure messaging app has to offer. While Threema has never achieved the notoriety of apps like Signal or Telegram, that doesn't mean that it's not worth your attention.

Today we're going to look at Threema, a secure, anonymous messaging app from Switzerland.

Signal messenger security audit