Texas-based RealPage’s YieldStar software helps landlords set prices for apartments across the U.S. With rents soaring, critics are concerned that the company’s proprietary algorithm is hurting competition.

On a summer day last year, a group of real estate tech executives gathered at a conference hall in Nashville to boast about one of their company’s signature products: software that uses a mysterious algorithm to help landlords push the highest possible rents on tenants.

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