Yes, both Slack and ClickTime offer a Free Trial.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
ClickTime is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for ClickTime Starts at $9/User/Month when Billed Yearly.
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 ClickTime includes Connecteam, Smartsheet, TimeTracker App, Timesheets.com, TrackingTime, Clockify, Tick, TimeTrack, Timesheet, TimeClick, OfficeClip Timesheet and T Sheets.