Stitch Fix uses a proprietary AI algorithm called 'Latent Style' to analyze billions of client ratings from its Style Shuffle feature and other data sources to build multi-dimensional style profiles for each client. These profiles predict not just what items clients will like, but also guide the emails, ads, and inventory selections shown to them.

Style Shuffle, launched in March 2018, is an in-app feature where clients give a thumbs up or thumbs down to images of clothing items and outfits. The Latent Style algorithm processes these ratings alongside fix feedback, purchase history, and written notes to construct a style map for every client and every item in inventory. As of 2022, clients had submitted over 10 billion interactions through Style Shuffle. Stitch Fix also introduced StyleFile in 2024, an AI-generated multi-dimensional style profile shown to clients that classifies them across hundreds of style personality combinations, improving conversion by a reported 5%.