Sima
Sistani

Sima Sistani is a technology entrepreneur and executive who has spent more than two decades building, scaling and reinventing consumer businesses around one central idea: how technology can create meaningful human connection at scale.

She co-founded and led Houseparty, growing the social video platform to more than 100 million users before its acquisition by Epic Games, where she went on to lead social products across the company, including Fortnite. She later became CEO of WeightWatchers, leading the nearly 60-year-old company through one of the most consequential transformations in its history—from traditional weight management into digital and clinical health.

Today, Sima serves on the Board of Directors of Best Buy and teaches women’s leadership at Duke University. Having built a startup from zero, navigated a major acquisition, operated inside one of gaming’s most influential companies and led the reinvention of an iconic consumer brand, she brings a rare perspective on community, transformation and leadership when the old playbook stops working.

In 2026, Sima launched Liberation of Flowers, a collection of fine fragrances disrupting traditional olfaction by creating energetic scents for who you're becoming, not who you've been.