[SolarNet]

One problem they do have is - compared to discord - a poor strategy for monetizing non-enterprise communities. Discord will allow individuals to upgrade their discord plan (for small benefits everywhere) and then they can give a boost to a server they appreciate. This means discord can monetize any community.

Slack on the other hand has communities with thousands of members in them that have zero monetization. No one is going to shell out 60k for their open source project's slack to be monetized.

[kbar13]

Do you think slack with its b2b model where companies pay per user or discord where users pay only if they want to makes more money?

I would bet that the free plan for slack is basically free advertising for them to on board people to their paid plans