Bob Schafer

Bob Schafer, PhD, is the CEO of Lumos Labs, the company behind Lumosity, the world's largest brain training platform with over 100 million users. A Stanford-trained neuroscientist with postdoctoral work at MIT, Schafer founded Prophecy Sciences (YC W13) before joining Lumos Labs via acquihire in 2015. He rose from Head of Research to Chief Science Officer to President of Lumosity DTx before being named CEO in May 2023. Under his leadership, Lumos Labs achieved FDA 510(k) clearance in December 2025 for LumosityRx (marketed as Prismira), the first prescription digital therapeutic for attention improvement in adults with ADHD — validated by a 500-participant randomized controlled trial.