Oura took the fitness tracker concept and put it in a ring. Founded in Finland in 2013, the company’s Oura Ring packs sensors for heart rate, body temperature, blood oxygen, and movement into a titanium band that looks like a normal piece of jewelry. The ring form factor is the key differentiator — it’s comfortable enough to wear 24/7, including during sleep.
Sleep tracking is where Oura really shines. The ring measures sleep stages, heart rate variability during sleep, and body temperature trends. Each morning, users get a Readiness Score that indicates how recovered they are. The data has proven accurate enough that research institutions have used Oura rings in clinical studies, including COVID-19 early detection research.
Oura shifted to a subscription model with the third-generation ring, charging a monthly fee for full access to insights and features in the app. The company has sold over a million rings and raised $250 million in funding, reaching a $2.55 billion valuation. Celebrity endorsements from the likes of Prince Harry and Kim Kardashian have boosted the brand’s visibility. Oura competes less with fitness trackers and more with the growing “health optimization” movement favored by biohackers and wellness enthusiasts.
