How a doctor’s stroke at 24 inspired his $75M smart ring startup - see his pitch

Dustin Freckleton’s journey from medical student to health-tech entrepreneur began in 2011 with a life-altering stroke at age 24. The incident left him temporarily paralyzed on one side and initiated a years-long search for the underlying cause. Nearly seven years later, Freckleton received a diagnosis of sleep apnea, a disorder in which airways are blocked during sleep and which is linked to a significantly higher risk of stroke. Freckleton also suffered from atrial fibrillation, an irregular heartbeat often associated with both stroke risk and sleep apnea.

Motivated by these personal health challenges, Freckleton founded Happy Health, a Texas-based startup focused on sleep apnea diagnosis and management. The company officially emerged from stealth mode this week, after raising $75 million in multiple funding rounds since 2019. Key investors include ARCH Venture Partners and OpenLoop, who have supported the company through major milestones such as manufacturing scale-up, clinical validation, and securing clearance from the Food and Drug Administration for its flagship product - a smart ring designed to help diagnose sleep apnea efficiently. The most recent tranche of funding for Happy Health closed in 2025.

Happy Health’s core product is an AI-powered smart ring that collects biometric data as users sleep. This data is analyzed by proprietary artificial intelligence to identify patterns indicative of sleep disorders. In addition to the wearable, Happy Health offers a connected care platform: following sleep data analysis, users can consult with physicians within the company’s network. These healthcare professionals can deliver an official diagnosis and prescribe appropriate treatments such as CPAP machines or dental devices.

Since its beta rollout, tens of thousands of people have used the Happy Health platform, according to Freckleton, who declined to disclose company valuation or revenue figures. He draws a distinction between Happy Health and consumer-focused competitors like Oura, noting that Happy is both a diagnostic tool and a pathway to treatment. “If you want to track your bad sleep, go to Oura,” Freckleton said. “If you want to fix your bad sleep, come to Happy.”

Patients can access Happy Health’s system either through direct online purchase or via physician referral. The service costs $396 out-of-pocket, which includes the smart ring, one year of sleep tracking, and doctor consultations, and is often covered by insurance, according to the company.

Looking ahead, Freckleton believes the ring could eventually help monitor other chronic conditions linked to sleep apnea, such as heart disease and diabetes. However, he says the company chose to focus on sleep apnea due to its underdiagnosis and significant long-term health consequences.

The company shared a redacted version of the pitch deck that helped it raise $75 million, highlighting investor interest in technologies that integrate wearable data, AI analytics, and streamlined healthcare delivery. With rising awareness of sleep disorders and the broader implications for chronic disease management, Happy Health is positioning itself at the intersection of medical technology and digital health platforms.