Slack offers Free Trial, but Shibumi does not.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Shibumi is designed for Large Enterprises, Small Business and Medium Business.
The starting price of Slack begins at $2.67/Month, while pricing details for Shibumi are unavailable.
Some top alternatives to Slack includes Microsoft Teams, Glip, Google Chat, ChatWork, Dialog, Office Chat, imBee, Takle, SPACE Channel and Teamwork Chat.
Some top alternatives to Shibumi includes and undefined.