Discord is basically IRC, with VOIP, in a browser.
Elysium use it.
The UI is a catastrophe. It's so confused and cluttered.
You have to register your account before you can write anything. This means handing over your email addy - and it looks like all the mailinator addresses have been blacklisted.
I gave up.
I wanted to offer a VOIP server for WoW, where WoW provides position data to the VOIP server, and so everyone can hear the people nearby them talking, with horde voices (for alliance) and alliance voices (for horde) being harsh and garbled. 3D positioning on audio, and so directionality for audio and fading with distance, etc.