Slack offers Free Trial, but ClientZen does not.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
ClientZen is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Slack begins at $2.67/Month, while pricing details for ClientZen 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 ClientZen includes Appzi, Advize.ai, Inmoment, Qualified, SentimentSnap, ProductLogz, Workvivo, zenloop, Tagai, Nolt, IFTTT and ZenSurvey.