ADP vs APO Comparison

Automatic Data Processing is a global technology company providing cloud-based human capital management solutions, enabling clients to better implement payroll, talent, time, tax, and benefits administration. Additionally, ADP provides human resource outsourcing solutions that permit customers to offload some of their traditional HR tasks. The company operates through two segments: employer services and professional employer organization services. Employer services consist of the company's HCM products as well as a la carte HRO solutions. PEO services contain ADP's comprehensive HRO solution, where it acts as a co-employer with its customer. As of fiscal 2025, ADP serves over 1.1 million clients and pays over 42 million workers across 140 countries.

Apollo is one of the world's largest alternative asset managers, with $908.4 billion in total assets under management, or AUM, including $685.0 billion in fee-earning assets, at the end of September 2025. The company has two core operating segments: asset management and retirement services. Apollo operates with scale in each of its major product lines-private equity (with $125.6 billion in total AUM and $71.7 billion in fee-earning AUM), real estate/real assets ($59.6 billion/$27.1 billion), and private credit ($723.2 billion/$586.2 billion). Apollo has a distribution profile that is likely not too far off from the industry averages-with 84% of its assets held by institutional investors and 16% by high-net-worth clients.