health-monitoring
(3)
Prana
Prana is a San Francisco startup building a 24/7 AI doctor that watches your health data between checkups. It pulls your medical records and wearable data into one clinical timeline, watches for early warning signs the company calls 'clinical drift' - rising blood pressure or glucose weeks before a crisis - and lets you chat with its AI for free or see a real physician for a flat $39 visit. Founded by Meer Patel, Vishvam Rawal, and Sanjit Menon, Prana launched out of Y Combinator's Winter 2026 batch.
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.
Vivoo
Vivoo is a San Francisco-based health tech company that makes at-home urine test strips analyzed via smartphone camera. Founded in 2017, the company offers a wellness platform that measures 8+ biomarkers — including hydration, vitamins, minerals, pH, ketones, and oxidative stress — and delivers personalized nutrition and lifestyle recommendations through a free mobile app. Backed by $19.4M in funding led by Tim Draper, Vivoo is sold at Target, Walmart, and Sam's Club, and has expanded to 100+ countries with a focus on making lab-grade health insights accessible to everyday consumers.