What is the difference between pay equity software and pay transparency software?

They are largely the same tools sold under two names, and several vendors package them as one product. The useful distinction is direction. Pay equity work is inward: analysing your own data to find and close unexplained gaps between comparable employees. Pay transparency work is outward: publishing salary ranges in job adverts, answering employee requests for information about how their pay was set, and filing gap reports with authorities. Most buyers need both. Coverage varies far more on the transparency side, because the obligations depend entirely on which countries and states you employ people in.