Yes, both Slack and UI-licious offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
UI-licious is designed for Large Enterprises, Small Business, Medium Business, Freelancers and Individuals.
The starting price of Slack begins at $2.67/Month, while pricing details for UI-licious 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 UI-licious includes and undefined.