Can Slack be self hosted?

Related questions

1. What is Riot software?
2. What is contact Matrix?
3. What is matrix approach?
4. What does you are a riot mean?
5. Why is it called a reverse proxy?
6. What is the riot act means?
7. What is Matrix leadership?
8. What is escalation matrix?
9. What are the important elements of a project communication plan?
10. What is matrix support?

Tags

1. #outgoing
2. #alternative
3. #webhook
4. #features
5. #limited
6. #existing
7. #compatibility
8. #compatible
9. #support
10. #including
11. #source
12. #superset
13. #incoming
14. #hosted
15. #rival
16. #slack
17. #integrations
18. #mattermost