Yes, both ScheduleOnce and Zoho Flow offer a Free Trial.
ScheduleOnce is designed for Large Enterprises, Medium Business and Small Business.
Zoho Flow is designed for Large Enterprises, Medium Business and Small Business.
Pricing for ScheduleOnce Starts at $10/User/Month when Billed Yearly whereas for Zoho Flow Starts at $10/Month when Billed Yearly.
Some top alternatives to ScheduleOnce includes Appointy, Acuity Scheduling, Calendly, Scheduly, SnapAppointments, DaySchedule, Appointmind, Web-appointments, i-Scheduling for Appointments and CatchApp Bookings.
Some top alternatives to Zoho Flow includes Zoho One, Zapier, Nintex, Integrify, ProcessMaker, IBM Business Automation Workflow, BPMapp by 500apps, ZapUp by 500apps, Built.io Flow and Cflow.
