smart-ring
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The Smart Glasses That Refuse to Film You
No camera. No speaker. Just a green line of text floating where you need it. Even Realities built the anti-spectacle smart glasses - and turned itself into a billion-dollar company doing it.
Ultrahuman
Ultrahuman is a Bengaluru-founded health-technology company building a subscription-free wearable and diagnostics ecosystem centered on its Ring AIR and Ring PRO smart rings. Beyond the ring, the company sells a continuous glucose monitor (M1), a home environmental sensor (Ultrahuman Home) and a blood-biomarker service (Blood Vision), stitching them into a single app that turns sleep, movement, metabolic and recovery data into personalized nudges. Founded in 2019 by Mohit Kumar and Vatsal Singhal, it is now the second-largest smart-ring maker by units sold and is expanding US manufacturing to challenge market leader Oura.
ŌURA
ŌURA makes the Oura Ring, a titanium smart ring that reads sleep, recovery, heart rate, temperature and activity from the finger. Founded in Oulu, Finland in 2013 and now co-headquartered in San Francisco, it has shipped more than 5.5 million rings, surpassed $500M in 2024 revenue and reached an $11B valuation in its 2025 Series E.
Tom Hale
Tom Hale is the CEO of ŌURA, the Finnish-American health technology company behind the Oura Ring - a smart ring that tracks sleep, recovery, and biometric data. A Harvard-educated technologist with 30+ years spanning Macromedia, Adobe, Linden Lab (Second Life), HomeAway, and SurveyMonkey, Hale came to Oura after a personal health crisis led him to the ring itself. He joined in March 2022 after writing a persuasive letter to the board after initially being rejected. Under his leadership, Oura has grown from a niche wearable to an $11 billion company on a path toward $2 billion in annual revenue, with the U.S. Department of Defense among its largest enterprise customers.