Katie Mancilla is the Founder and CEO of Eleuthera Zo, a modern fine jewelry house redefining luxury through uncompromising transparency, exceptional craftsmanship, and honest value for discerning clients who expect more from luxury. With a career spanning nearly two decades in brand strategy and digital marketing, she brings a rare combination of commercial expertise and deep industry insight to one of luxury's most traditional categories.

Before founding Eleuthera Zo, Katie built and led KC Group Media, a digital marketing agency she launched in 2014 that advised fashion, beauty, and direct-to-consumer brands on growth, marketing, and digital strategy. After more than fifteen years helping shape other companies, she turned her focus to building a business of her own, one grounded in the principles of transparency, craftsmanship, and long-term value.

Katie has become a respected voice on the evolving future of luxury, writing and speaking on fine jewelry pricing, ethical sourcing, craftsmanship, and the disconnect between luxury storytelling and industry practices. Through her writing, speaking engagements, and Substack, she offers an insider's perspective on long-held assumptions about the jewelry industry while advocating for a more informed, values-driven approach to collecting and wearing fine jewelry.

Her work and entrepreneurial journey have been featured in LA Weekly, NY Weekly, CEO Weekly, US Reporter, and LA Wire. She divides her time between Tampa, New York, and Tuscany, where her first European boutique is currently in development.