Delta Chat is a free open source encrypted messaging system that works through email (so it is federated too). You can follow at:

➡️ @delta

There are apps for Android, iPhone/iPad, Linux, Mac and Windows. More info at

(You can also message people on conventional email accounts unencrypted.)

Coolest thing is it supports video and audio calls by creating a jitsi room and sending an invite, cool solution:)

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This is a brand new server run by the main developers of the project as a spin-off of 🐘 It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!