{"p":"","h":{"iv":"ROXSYW+cfvEbFHu5","at":"ocxplSQjdRC3tXEtB/9/wg=="}}
@darius This may not be what you want but the closest I know of is XMPP messaging like Jabber. There are Fedi servers that serve these apps. See https://fedi.directory/tag/instant-messaging/