Neither Ontop nor Paychex Flex offers a free trial.
Ontop is designed for Medium Business and Small Business.
Paychex Flex is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Ontop begins at $49/month when monthly, while pricing details for Paychex Flex are unavailable.
Some top alternatives to Ontop includes Freshbooks, Pilot, Remote Team, Paychex Flex, Paycom, CloudPay, Deel, Remote.com, Papaya Global, Remote, Multiplier, Remofirst, Paycor and Info-Tech.
Some top alternatives to Paychex Flex includes BambooHR, Rippling, ADP Workforce Now, SurePayroll, Paylocity Web Pay, Gusto, Paycom, QuickBooks Payroll, Paybooks, ADP Payroll Services and Coverio.