Yes, both Slack and Dovetail offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Dovetail is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Dovetail Starts at $15.
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 Dovetail includes Figma, FigJam, UXPin, UX-App, UXCam, UserX, UXtweak, UserExperior, UserZoom, UserTesting, UXArmy and UX Metrics.