I tried using Slack in my business and found it to be not as effective as Basecamp. Basecamp has very strong project management and communication features EXCEPT it is hard to order by priority if you have multiple users and multiple projects.
Also - Slack is WAY more expensive than Basecamp. I would pay $1,000+ per month for Slack vs the $100 something I am paying each month for Basecamp.
Teams is such a step up from Lync/Skype For Business. The screen sharing and conference features are so much better and work well. I just wish my organization used it for more than IMing each other and actually messages in threads in teams.
The key difference is that an active user on Microsoft Teams is someone with an outlook mailbox, and an active user on Slack is someone who uses Slack
Would be useful to note how many users of Teams do so, where their employer pays specifically for it. My guess is that most users of Teams are effectively corporate ‘Microsoft shops’ who effectively get Teams for free with their Office365 bundle.
Another useful statistic to ascertain: how many startups or small businesses use Slack compared to in large corporates?