How many companies use slack?

Related questions

1. Is Slack data encrypted?
2. Is the slack app free?
3. Are slack channels public?
4. How much revenue does Slack have?
5. Can you use slack for free?
6. Is Slack encrypted?
7. What is Microsoft slack?
8. Do I have to pay for slack?
9. Does NASA use slack?
10. Are discord and slack related?

Tags

1. #american
2. #states
3. #every
4. #market
5. #second
6. #japan
7. #people
8. #largest
9. #teams
10. #those
11. #united
12. #included
13. #outside
14. #reside
15. #users
16. #company
17. #there
18. #slack
19. #accounts
20. #million
21. #across