Not every HRIS can call itself all-in-one, but your top priority should be to find one that is. An all-in-one HRIS is designed to handle the A to Z of HR—employee records, payroll, performance, time tracking, benefits, hiring, onboarding, and so on, allowing you to leverage one system to do your job instead of a combination of systems.
Download this report from The JHRS Knowledgebase under the "General HR Management" sub-folder. (Requires Professional Level access.)