SimpleX Chat is an instant messenger that is decentralized and doesn’t depend on any unique identifiers such as phone numbers or usernames. Users of SimpleX Chat can scan a QR code or click an invite link to participate in group conversations.
-privacyguides.org
It’s clearly proving to be the most innovative technology when it comes to decentralized communication, in my opinion.
Because when you read their website https://simplex.chat/ and they say stuff like “Possibility of MITM > NO” and “Central component or other network-wide attack > No - resilient” they kind lose their credibility.
Also, “Other apps have user IDs (…) SimpleX does not, not even random numbers.” > there must be an ID at some point. When you invite someone with a QR code or a link that effectively becomes an ID - even if it changes for every invitation. Also servers need to coordinate message delivery, some form of ID is required for that.
The way the messaging queues work and what the servers see is interesting but I’m yet to dig into that.