The new site will target 15 to 45-year-old women, providing information on a range of fashion and beauty items including high street and designer labels.
Stylefinder.com will have its own dedicated editorial content. It will also offer e-commerce opportunities, as users will be able to click through to a retailer's website direct to where the item is available for purchase.
The editorial content will be led by Maria Milano, executive editor for Conde Nast Interactive. Sales will be headed by Conde Nast commercial director Serena Privett.
Conde Nast also runs magazine spin-off sites through its Interactive division, including Vogue.com, Glamour.com and GQ.com.