Digital health company Happy Health secured a $75 million series A funding round to continue building its artificial intelligence-powered platform for continuous home-based care.
ARCH Venture Partners and OpenLoop led the funding.
“For decades, healthcare has waited until people are already sick to act,” said Paul Berns, ARCH Venture Partners managing director, in a statement. “Happy Health is showing that many diagnoses may never need to happen inside a hospital at all. By combining continuous physiological monitoring with physician-guided care, they're proving what care can look like when it moves into the home.”
The Austin, Texas-based startup’s first application focuses on sleep because it “offers one of the richest windows into human physiology,” executives say. Its clinical-grade smart ring—dubbed Happy Ring—first received U.S. Food and Drug Administration (FDA) approval in October 2024.
Happy Sleep—the company’s comprehensive sleep medicine platform—also includes a clinical care team comprised of board-certified sleep physicians. The company’s website says it is in network with most major health insurance plans, including Blue Cross and Medicare.
The Happy Ring was later approved for at-home sleep testing in June 2025, making it the first FDA-cleared smart ring for multi-night sleep testing and 24/7 biometrics.
Rather than comparing patients against population averages, Happy Health's platform continuously builds an individualized physiological baseline unique to each person, according to the company. Clinical-grade sensors collect over 2.8 million biometric measurements every night, while AI and first-principles physiological models help physicians distinguish meaningful biological change from normal day-to-day variation. Instead of asking whether a patient looks like everyone else, the platform asks whether they still look like themselves, company executives said.
Moreover, the device is able to diagnose obstructive sleep apnea (OSA), insomnia and other sleep-related conditions in as few as three nights with 98% accuracy, the company says.
Every night, the body reveals changes across respiratory, cardiovascular, neurological and metabolic systems, often long before symptoms appear. Happy Health executives assert the same platform can eventually support earlier physician-guided detection and management across cardiovascular, metabolic and other chronic diseases.
“We've built a healthcare system that waits for people to become sick before it acts,” said Dustin Freckleton, M.D., Happy Health founder and CEO, in a statement. “I had a stroke at 24 and went undiagnosed with sleep apnea for another seven years, even though it's a known stroke risk factor. No one should have to experience the worst outcome before the healthcare system notices something is wrong. We built Happy Health to help physicians detect disease earlier and fundamentally change how care is delivered.”