Gusto offers Free Trial, but Sling does not.
Gusto is designed for Freelancers, Medium Business and Small Business.
Sling is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Gusto Starts at $40/user/month when monthly whereas for Sling Starts at $2/User/Month.
Some top alternatives to Gusto includes BambooHR, Paychex Flex, Rippling, Freshbooks, ADP Workforce Now, Justworks, Zenefits, Paycom, OnPay, RUN Powered by ADP, QuickBooks Payroll, Deel, Remote.com, Papaya Global, Multiplier, ADP Payroll Services, Remofirst, Paycor, NETCHEX and Elite HRMS.
Some top alternatives to Sling includes Rippling, Connecteam, Homebase, When I Work, Findmyshift, Planday, Schedule it, TrackSmart Scheduling, eSchedule, MakeShift, Shiftworkz, StaffAny and SocialSchedules.