heart-rate-variability
(3)
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.
Roga
Roga is a neurotech company building a non-invasive vagus nerve stimulation wearable paired with an AI-guided meditation app to reduce stress and burnout. Founded by two people who each managed clinical anxiety, the discreet behind-the-ear device sends gentle electrical pulses to calm the nervous system, while the companion app personalizes meditation and tracks progress. Based in Los Angeles and Toronto, Roga sells direct to consumers and to employers running workplace wellness programs.
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.