We started using Discord before Slack had voice available. I would say that the voice quality is probably comparable, but Discord offers a lot more features. It's basically the "Slack" of voice (very comparable in design and features, just centered on voice).
Hmm interesting, Slack recently baked in screen sharing and it works just fine for us, but it's great to hear Discord works really well. Cool to hear companies are using software intended for gamers.
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