Telegram: russian owned, requires phone number, rolls their own unproven cryptography Discord: privacy nightmare Signal: requires phone number, promotes their own shitcoin Matrix: not the best UX, federation is not decentralized enough, most people won't run their own homeserver and will just use the default one. Threema: paid Keet: missing a mobile app Sphinx: will building on LN scale? Session: ? Briar: ?
Lol what! Telegram is Russian?
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That was poorly worded but the owner is russian and as such can easily be coerced by the russian state to give every up.
The most important criticisms are the in-house custom cryptography and the non-e2e encrypted chats by default.
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