How it grew: Its undies exude sexiness, but that’s not the only thing putting the five-year-old company in the accelerated-growth lane. Adore Me has benefited from its reliance on A/B, or split testing—which enables it to determine how different designs, models and poses score with customers. Other growth strategies include running ads, for the first time, on MTV, Bravo, E and Lifetime; dipping into brick-and-mortar retailing by putting garments in a handful of Nordstrom stores; and introducing less lacy bras for T-shirt wearers.

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