XMPP and Matrix are two popular communication protocols used in instant messaging. A recent comparison highlights their differences, including metadata handling and end-to-end encryption (E2EE). While XMPP's E2EE is not as robust as Matrix's, both protocols have their strengths and weaknesses. For instance, XMPP's simplicity makes it easier to use, but Matrix's more complex architecture provides better security features.

Source: https://news.ycombinator.com/item?id=41200028