Stitch Fix is an online personal styling service in the United States. It uses recommendation algorithms and data science to personalize clothing items based on size, budget and style. The company was founded in 2011 and had an initial public offering in 2017 with a valuation of $1.6 billion. Stitch Fix generated more than $1 billion in sales during 2018 and reported 3.4 million customers in June 2020. It is headquartered in San Francisco, California and employs 8,000 people worldwide.