Common Thread Collective (CTC) was founded in 2012 by Taylor Holiday in Costa Mesa, California, with a remote-first team of more than 150 operators serving DTC ecommerce brands. The agency positions itself as a profit partner rather than a media-buying vendor, building an operating system designed to plan and execute the daily actions that drive profitable growth rather than reporting on top-line revenue or ROAS in isolation. The flagship offering is the Prophit Engine, a hybrid software-and-service product that consolidates forecasting, media buying, and strategy into a single role called the Prophit Engineer, supported by proprietary software for forecasting, contribution margin tracking, and incrementality testing. CTC reports more than $3 billion in profitable growth engineered for clients, with the Prophit Engine specifically delivering 3% forecast-to-target accuracy, +33% YoY revenue growth, and +42% YoY contribution margin growth across its current client set. A strategic partnership with The Acacia Group was announced in July 2025. Client work spans Theragun, Liquid Death, ColourPop, Native, Girlfriend Collective, APL, Born Primitive, Buffy, Igloo, Love Wellness, Olukai, Travis Matthew, Loft, Ann Taylor, and Nike Strength.