For your payroll assessment, why not include free services like Payroll4Free.com?
ADP vs Paychex vs Gusto compares 3 similar full service payroll providers. By “full service” I mean they provide tax support employee benefits, and can run automatically, among other features.
For free and low-cost solutions, we have a separate guide: Best Free Payroll Software for Taxes, Direct Deposit & More. This guide covers Payroll4Free, as well as Paycheck Manager, Xero and other options.