Slack Pricing: Free vs Paid – Is it worth paying for Slack?

Slack is completely free to use for as long as you want, and you may invite as many people as you want. This will appear on the price page once you've signed up for Slack Pricing. In press releases and advertisements, Slack claims that its free tier allows an unlimited number of users. Slack concludes by stating absolutely that there is no limit. You have the option to invite "as many people as you choose."