Stephen Knoll is a New York institution born in 1991 on the Upper East Side, where cutting, color, and treatment have been perfected by specialists for over three decades. Blending a New York aesthetic with Japanese cosmetic innovation, the salon developed a patented nanocapsule technology in partnership with Kosé — delivering botanicals, proteins, and moisture deep into the hair fiber for repair from within. From the salon floor to salon-grade haircare products, Stephen Knoll offers a complete ritual for repair, volume, hydration, and frizz control. Trusted on red carpets, editorial sets, and by thousands of loyal clients, with a 4.9-star average across 2,400+ reviews, Stephen Knoll is where transformative hair begins.