Yes, both Greminders and Doodle offer a Free Trial.
Greminders is designed for Large Enterprises, Medium Business and Small Business.
Doodle is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Greminders Starts at $5.95/User/Month when Billed Yearly whereas for Doodle Starts at $6.95/Month.
Some top alternatives to Greminders includes Appointy, Setmore, Calendly, Cogsworth, Book Like A Boss, Doodle, Scheduly, Appointment Reminder, Apptoto, GoReminders, Appointmind and ReminderCall.com.
Some top alternatives to Doodle includes Appointy, Calendly, Bookafy, Cogsworth, Scedule, Calendify, Book Like A Boss, Meetin.gs, SavvyCal, DaySchedule, CatchApp Bookings, Tocaly and Zoho Booking.