
From legal forms to shoes, diapers and sports cards, the categories keep changing. Brian Lee’s durable obsession is making unfamiliar transactions feel safe enough to try.

Ted Mann is the co-founder and CEO of CollX, a Haddonfield, New Jersey app that lets collectors photograph a trading card and get its market value in under a second. A serial founder who built the couponing app SnipSnap (sold to Slyce for $6.5M) and later ran Slyce/Partium, Mann turned his kids' love of card trading into a business with more than 3 million users, a booming in-app marketplace, and a $10M Series A backed by sports figures like Eagles GM Howie Roseman, 76ers owner David Adelman, and MLB star Bobby Witt Jr.