Function of Beauty is a personalized hair care brand that creates unique shampoo and conditioner formulas based on customers' hair type, goals, and preferences. The company was founded in 2015 by Zahir Dossa and Joshua Maciejewski and is headquartered in New York City. Function of Beauty's products are vegan, cruelty-free, and free of sulfates, parabens, and other harmful ingredients. The company has received funding from investors such as Y Combinator and GGV Capital.