> This also means that other messengers using similar contact discovery allow to de-anonymize its users the same way. While I don't like to have messaging apps

> This also means that other messengers using similar contact discovery allow to de-anonymize its users the same way. While I don't like to have messaging apps tied to the phone number, it has become a mainstream model that most people accept and know how to use. I have been thinking for some time that we need a mainstream messaging app that uses end-to-end encrypted, and you can get in contact with a peer only if it accepts you (just like old messaging apps, WLM, ICQ, etc), so, if the peer doesn't accept to chat with you, you won't even know whether the number is registered. In fact, my initial PoC is https://safer.chat/ https://safer.chat/, I just need the time to make an app from it.