Automatic Data Processing is a US-based global technology company providing cloud-based enterprise human resources management software and services. ADP improved its revenue from $11.7 billion in FY 2016 to $20.6 billion in FY 2025. That's a compound annual growth rate of 6.5%. ADP has a stellar financial position. Its long-term debt/equity ratio is 0.6, while the interest coverage ratio is right around 13.