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Delta Chat + Chatmail = ❤️

Delta Chat is an encrypted messaging app based on the email protocol, so you can use your email account if you want. The best way to use it is with relays, so you don't have to worry about setting up your email account in the app.

Unlike other messaging apps that give you a username, in order to communicate with someone, you need to have that person's contact link—or they need to have yours.

It is open source, focuses on privacy, and is available for free on all operating systems.