Ouras smart ring uses 20 biometric markers to track sleep, physical activity, and stress resilience.

Founded in 2013,Ourasecured its first funding on Kickstarter, the crowdfunding site, in 2016.

Counting this new tranche of capital, the tech startup has raised $550mn since inception.

One smart ring to rule them all? Finnish startup Oura raises $200M

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In 2022, Ourabecame a unicorn and sold its millionth ring.

Oura said it signed partnerships with key retailers such as Amazon and Target this year.

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Smart rings also tend to move less and fit better against the skin.

Smart ring makers sold 880,000 units in 2023, said IDC.

TheOuraRing made up80% of these sales, soaring above competitors like Ultrahuman and Samsung.

Siôn Geschwindt

By those figures, Oura genuinely does seem to be the current lord of the (smart) rings.

Sorry, I couldnt help myself.

Story bySion Geschwindt

Sion is a freelance science and technology reporter, specialising in climate and energy.