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Time to get serious with E2E encrypted messaging
(techcrunch.com)
This is a most excellent place for technology news and articles.
The two encrypted messaging platforms I currently suggest are XMPP or Matrix. Both are usually fine and are decentralized. The main thing with them is to either self-host or choose a server you trust to set up an account — which applies to the Fediverse in general.
Out of curiosity, is there anything stopping you from suggesting SimpleX? How does SimpleX compare to XMPP or Matrix?
Mostly just that it's still pretty new and thus hasn't been as polished or scrutinized yet. Haven't tried it myself. For the sake of the OP's question, it may also be notable that it's a UK company.