ADP is a legacy powerhouse that offers the ‘RUN’ platform specifically designed to scale for small business needs. As one of the world’s largest payroll providers, they offer unmatched multi-state compliance and specialized HR support centers for growing firms. The platform is built to handle complex tax requirements and provides deep reporting capabilities that satisfy both accountants and business owners. Choosing ADP provides the peace of mind that comes with using an industry leader with decades of institutional knowledge.