Neither Topicflow nor Calendar offers a free trial.
Topicflow is designed for Large Enterprises, Medium Business and Small Business.
Calendar is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Topicflow Starts at $5/User/Month when Billed Yearly whereas for Calendar Starts at $6/Month when Billed Yearly.
Some top alternatives to Topicflow includes MeetingKing, 123FormBuilder, Stratsys Meetings, Amazemeet, Minute, Range Meetings, Tidycal, Meetgeek, Calendar, MeetNotes and upto.team.
Some top alternatives to Calendar includes Appointy, Calendly, Cogsworth, Scedule, OpusTime, Book Like A Boss, Calendar.AI, EasyCalendar, Hupport, Office Tracker, Schedule it, Schedule.cc by 500apps and DaySchedule.