My FC (guild) in FF14 uses Discord now. Works fairly well, except for one of our people, who will at random times be unable to hear any of us speaking, yet we can hear him. We've spent hours troubleshooting, trying different drivers and such, reinstalling, but no dice. He's the only person who has the problem, so while I'm convinced it's something to do with his PC, I haven't been able to help pinpoint the issue. Rather irritating; were it not for that, we'd all be as happy as could be using Discord. It has built-in volume control (where it will lower game sounds when someone speaks); the only way to get that with Teamspeak, last I checked, was a plug-in from 2010 that hasn't been updated since (and TS itself has been 2-3 times, I think).
One nice thing with Vent was it took all of 15-20 minutes to set up by configuring the text file. But it's archaic as all hell with it's 8 user limit (for the free server, that is). Not to mention the sound codecs...