I think which fits your community is really dependent on your use case. Discord has great tools around moderation and membership tiers; it's designed for users

I think which fits your community is really dependent on your use case. Discord has great tools around moderation and membership tiers; it's designed for users you don't trust. Slack is much more for a community where everyone knows each other (or at least trusts each other a bit, like you'd trust a coworker).