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2x reasons to not use it (shortened version of

1 - Signal requires a phone number to register. For most users, this will be a mobile phone number - encouraging people to use the cellular network is very bad, since it enables surveillance and location tracking. This basic premise alone makes Signal highly problematic from the start.

2 - Even if you use a landline number for Signal and avoid the cellular network entirely (which is possible), you have to disclose private information (namely the number), which then allows your account to be identified and linked to you.

3 - Regardless of which number you use to register Signal, you will have to enter a 6-digit code to activate your account. This code is sent to the provided number over the normal phone network...

4 - Signal is mainly a smartphone app - the desktop client functions merely as an appendage and requires the user to scan an on-screen QR code to link it to the phone app.

5 - Key management with Signal is very difficult, even for advanced users.

6 - Signal's advertisement overly focuses on its end-to-end-encryption features and claims "Privacy that fits in your pocket", while the equally important aspect of endpoint security is usually dropped under the table.e effort and allows the circumvention even of properly implemented encryption.

7 - Signal's infrastructure is highly centralised - its servers are located in the United States and Open Whisper Systems opposes any federation.

8 - Signal is partly funded by the Open Technology Fund, a U.S. Government program.

9 - Signal also has many other quirks, from the shady practices of its main developer Moxie Marlinspike, over the built-in needless disclosure of the fact that you are using Signal to your contacts, to the strangely prioritized implementation of giphy, while more urgent features are neglected.

10 - The final problem with Signal is that it would be very easy to mitigate many of the problems above.