Oura Health
Oura Health is a Smart Rings & Recovery company founded in 2013 and based in Oulu, Finland. It has raised $1.2B in total funding, most recently a Series E in 2025 at a $11B valuation.
Founded in Oulu, Finland in 2013, Oura makes a titanium smart ring that tracks over 50 metrics including sleep stages, heart rate variability, body temperature, and activity, delivering daily Readiness, Sleep, and Activity scores via a subscription app. It launched the Oura Ring 4 in 2024 and has sold more than 5.5M rings. Oura raised over $900M in a Series E (Oct 2025) at an $11B valuation and confidentially filed for a US IPO in May 2026.
Oura's ring form factor and sleep-first positioning carved out a distinct wearable segment, and its illness-detection work helped reframe the device as a health-monitoring tool rather than a fitness tracker.
ouraring.com ↗·Smart Rings & Recovery·
Finland·private 
