RealPage software is used to set rental prices on 4.5 million housing units in the U.S. A series of lawsuits allege that a group of landlords are sharing sensitive data with RealPage, which then artificially inflates rents. The complaints surface as housing supply in the U.S. lags demand. Some of the defendant landlords report high occupancy within their buildings, alongside strong jobs growth in their operating regions and slow home construction.