When you put it like that, sure. But Matrix is federated (sort of like IRC but it's "open federation" in that any room can be shared between home-servers) and h

When you put it like that, sure. But Matrix is federated (sort of like IRC but it's "open federation" in that any room can be shared between home-servers) and has e2e encryption. Rocketchat has neither of those features (though it is nice and simple if you just wanna throw up a chat server at a company -- which is the main purpose of the project as I understand). If you want to talk with other people then I would recommend Matrix.