Never trust anyone who offers you an "official" app/program/way of using it, the means of chatting on the internet, that survived for the longest (and will for decades to come) are those, that have just a simple protocol specification, that others can follow. IRC stood the test of time just because of this. If there was a central authority, an official client, proprietary server side or anything like that, it would have been abounded long ago.
IRC is insecure though, you can try to secure it to some degree, but it's still some frankenstein solution, instead of something that has reasonable privacy out of the box like a self-hosted XMPP server with OTR/OMEMO.