3 ms·Who, though? Matrix has contact discovery, doesn't it?by cwyers 6y agoWho, though? Matrix has contact discovery, doesn't it?Reelin 6y agoIf and only if you opt in to it. It's difficult to understate how important that is.3np 6y agoYou also have the option of using alternative identity servers, and still have no problem communicating with those on others.