DeltaChat - an e-mail based OSS messenger
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I know you know WhatsApp, Facebook, Telegram, Threema and Signal. But do you
know there is one messenger you likely don't know about but have an account
already? It works fully distributed, supports E2E encryption, allows group
chats, attachments, offline messages, does not track you, runs on all your
devices and has multi-client support? 

Sounds too good to be true? Meet DeltaChat.

DeltaChat is a messenger application which uses e-mail as backend. It connects
tto your email account and creates a DeltaChat folder. All your chat meessages
go there. If you export your encryption key from the delta chat app, you can
also read those messages via email (it uses gpg autocrypt).

Also, if you write someone from within the DeltaChat app and this person does
not have DeltaChat installed, this is perfectly fine. He can respond via E-Mail
and it will work just as well.

Okay, there are no stickers (yet) and obviouly no phone and video call
functionality. But other than that, it pretty much ticks all the boxes a
convenient and secure and free and distributed OpenSource messenger should.

The setup is as easy as entering your email credentials and everyhing else
is taken care of.
 * DeltaChat Homepage
 * DeltaChat Clients for Windows, Android, iOS, macOS, Linux and Source Code
# Changelog:
# * 2021-01-12: Created