Yes, both Zenefits and OnPay offer a Free Trial.
Zenefits is designed for Medium Business and Small Business.
OnPay is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Zenefits Starts at $8/User/Month when Billed Yearly whereas for OnPay Starts at $40/Month.
Some top alternatives to Zenefits includes Rippling, Paylocity Web Pay, BambooHR, ADP Workforce Now, ZenHR, Paychex Flex, Gusto, Paycom, OnPay, Remote.com, Papaya Global, Multiplier, ADP Payroll Services, Paycor and Access People HR.
Some top alternatives to OnPay includes Rippling, Paylocity Web Pay, SurePayroll, Square Payroll, Paycom, QuickBooks Payroll, Paybooks, ADP Payroll Services, Coverio, NETCHEX and Quikchex.