HB 2491 prohibits the sale and use of algorithmic devices that determine or recommend rental prices for residential properties in Texas. The bill defines an "algorithmic device" as any tool that uses one or more algorithms to calculate rent prices, with exceptions for products that publish rent data in an aggregated and anonymous manner or that comply with affordable housing program guidelines. The bill bans the sale of algorithmic device services that set or recommend rental rates and prohibits the use of nonpublic competitor data—such as actual rent prices, occupancy rates, and lease terms—in algorithmic rent calculations. Violations of these provisions are classified as deceptive trade practices under the Texas Deceptive Trade Practices Act (DTPA).