Evidentally, Inc. is a startup and spinoff of Empirical Education Inc., which has conducted dozens of rigorous experiments in its nearly two decades of work. The Evidentally team brings this experience to its focus on edtech. Its algorithms work with usage data and data from school systems to determine efficacy and address "selection bias," a critical problem with QEDs. School system data provides the demographics needed to say whether the product reduces or exacerbates achievement gaps.