He is the co-founder of Yoobi, Yes To Inc., Cheeky, Brandless, and Beach House Group. His first instrument was a brandless bass guitar brought for 50 euros. Brandless is a brand of its own. Leffler founded Brandless with Tina Sharkey in early 2014. In 2019, Brandless began to offer an optional subscription service to its customers. Initially, Brandless priced single items at $3, or multiple items for $3 total.