Yes, both Slack and Great Question offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Great Question is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Great Question Starts at $49/Month.
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 Great Question includes Figma, FigJam, UX-App, UserX, Dovetail, UXtweak, UserTesting, MFour, UXArmy, UX Metrics, UserLook and Proven by Users.