Slack offers Free Trial, but Hypercontext does not.
Slack is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Hypercontext is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slack Starts at $2.67/Month whereas for Hypercontext Starts at $5.
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 Hypercontext includes 123FormBuilder, Fellow, Parabol, e-Meeting, Tidycal, Meetgeek, Meetingbox, Flows, MeetingBest, Meeting+ and One One Meeting.