Not that I know of. Some people use Discord, although I almost never open mind to check for new messages. I have the same name there. Also the same name on protonmail. But the blockchain itself doesn't have any chat or direct messages. I didn't realize until recently that it doesn't even have image capability... the images are stored on somebody's server somewhere (ie: not really secure) and all that appears on the actual blockchain is a link to that image. But hey, it's still got uses and it's still cool.