StimScience Hires Former Fitbit Executive Tim Rosa as Chief Executive Officer to Scale its Somnee Sleep and Neuroscience Wearable Business

The pioneering neuroscience-based sleep company appoints industry leader to launch new products, drive growth, and unlock new consumer, employer, and healthcare channels

Wearable industry leader, Tim Rosa, announced as StimScience CEO (Photo: Business Wire)

BERKELEY, Calif.--()--Somnee – the first personalized, smart sleep headband that utilizes non-invasive, closed-loop neurostimulation for longer, higher quality sleep – today announced the appointment of Tim Rosa as its Chief Executive Officer (CEO). Leveraging expertise across the health and wellness industry and an unprecedented track record in scaling companies, Rosa will guide the company through its next phase of growth as it continues in its mission to help people sleep better through personalized neuroscience. Somnee is the sleep product line developed by StimScience.

“There’s a lot of exciting clinical research and momentum validating the importance of sleep fitness and its impact on cognitive performance, athletic performance, mental health, general health, and even weight loss,” said Rosa. “Wearables have done a great job educating consumers on their general sleep stage trends and insights. The challenge for most consumer-grade devices has been creating a closed-loop, lab-grade diagnostic in combination with a personalized therapeutic that adapts with the user and ultimately improves sleep onset, duration, and/or depth. I’m excited to partner with wearables, sleep products and services, and healthcare to close that loop and improve outcomes for 100 million consumers. With StimScience, the team has pioneered and delivered lab-grade technology in a sleep headband that accurately maps and measures brainwave patterns and applies personalized tES neurostimulation that nudges the brain to sleep.”

Rosa was recruited as CEO in November 2023 by renowned sleep expert and Somnee’s Chief Sleep Advisor Dr. Matthew Walker, PhD, and pioneering technology investor Vinod Khosla of Khosla Ventures. As the consumer sleep market continues to see record growth, Rosa’s immediate focus will be raising the company’s next round of funding, building brand awareness, spearheading the near-term launch of multiple new products and service enhancements, and further solidifying Somnee’s position as a pioneering leader in sleep fitness and other neurological health disorders.

“Technology is a catalyst for the positive innovation necessary to tackle the largest human challenges. We backed Somnee because the team had every component needed to bring forward clinical-grade consumer technology to change the face of sleep. Since our initial investment, this thesis is proving itself out,” said Vinod Khosla, founder of Khosla Ventures. “With Tim at the helm, Somnee can now scale to bridge a foundational health gap and cement itself as an iconic brand that carries weight with consumers, the medical and sleep health communities.”

Rosa brings over 20 years of experience in consumer and enterprise marketing, business management, and launching world-class brands, products, and services. As the former Chief Marketing Officer (CMO) at Fitbit, he was pivotal in establishing the connected health and fitness wearables category. Rosa scaled the company from a startup into a top 20 consumer brand, selling over 140 million devices in 100+ countries and helping to drive the largest consumer electronics IPO in history. Rosa wrapped his seven year tenure with Fitbit’s $2.1B sale to Google. Adapting this successful playbook, he will leverage his expertise to carve the same category-defining growth path for Somnee.

In the next 24 months, Rosa will build a world-class executive leadership team, evolve the company’s product line, expand strategic partnerships, open new retail, employer, and payer channels, complete a healthcare pilot study, and elevate broader conversations around sleep fitness.

“Sleep is increasingly recognized as one of the most fundamental habits not only for our day-to-day functioning, concentration, mood, and body health, but also for continued brain and body wellness as we age,” said Dr. Matthew Walker, Ph.D., Chief Sleep Advisor at Somnee. “Quality and duration of sleep impact hormone levels, obesity and diabetes, cancer immune factors, and are associated with Alzheimer’s disease. With sleep deprivation officially recognized as a public health issue, it’s crucial to continue spreading accessible education and resources, but also, new brain stimulation methods to help people prioritize and achieve a good night’s rest.”

Despite the critical role sleep plays in proactively maintaining health and preventing chronic disease, more than a third of U.S. adults do not regularly get enough uninterrupted sleep. Somnee is the first device of its kind that uses a revolutionary approach to sleep improvement through personalized closed-loop neurostimulation – integrating sleep lab-grade technology into a wearable headband. It's the only device proven to cut the time it takes to fall asleep in half and dramatically improve sleep quality with just 15 minutes of use. Somnee is 4x the effectiveness of a melatonin pill, 2x more effective than Cognitive Behavior Therapy (CBT-i), and 1.5x more effective than Ambien in improving sleep efficiency and duration – delivering a novel combination of effectiveness with the ease of use consumers desire.

About Somnee

Somnee is on a mission to help everyone sleep better through personalized neuroscience. Built upon decades of research and development, Somnee is the first smart sleep headband to help your brain naturally achieve a longer, higher-quality night’s sleep. The Somnee founding research team includes world-leading neuroscientists Matthew Walker, Ph.D., author of NY Times bestseller Why We Sleep and Director of UC Berkeley’s Center of Human Sleep Science; Robert Knight, M.D., Professor of Psychology and Neuroscience at UC Berkeley; Rich Ivry, Ph.D., Professor of Psychology and Neuroscience at UC Berkeley; and founder, Ram Gurumoorthy, Ph.D., former Chief Science and Technology Officer at Nielsen-acquired NeuroFocus Inc. Khosla Ventures led Somnee’s seed round to pioneer the next frontier of sleep health and other neurological health disorders. To learn more about Somnee, visit:


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