Oura Shrinks Smart Ring 40% Ahead of IPO Push, Eyes 5M Paid Members

Everything depends on staying ahead of rivals in a category still finding its footing
Oura faces accelerating competition as it prepares for its IPO with no product diversification to rely on.

From a small Finnish workshop to the threshold of public markets, Oura's latest ring represents more than a hardware refresh — it is a company declaring its readiness to be judged by the world. The Ring 5, shrunk by 40 percent yet more capable than its predecessor, arrives at a moment when the wearable health space is maturing from novelty into necessity, and when investors, rivals, and consumers are all watching to see who will define what that maturity looks like.

  • Oura compressed its Ring 5 by 40 percent — a feat requiring a complete internal redesign of sensors, battery, and architecture — without sacrificing battery life or accuracy.
  • With a confidential IPO filing underway and an $11 billion valuation anchored by a $900M funding round, the company is racing to prove its membership numbers and market leadership before going public.
  • The product cycle has accelerated sharply — from three years between generations to just eighteen months — signaling that competitive pressure, not comfort, is now setting Oura's pace.
  • RingConn shipped its Gen 3 the day after Oura's announcement, and Ultrahuman's Ring Pro arrives in July, fracturing what was once a near-monopoly in the smart ring category.
  • New features targeting GLP-1 medication users and low-impact exercisers, plus an AI health coaching partnership, suggest Oura is widening its net well beyond its original fitness-tracking audience.

Oura is betting that smaller is better. The Finnish smart ring maker's newest device, the Ring 5, has been shrunk by 40 percent — a compression that required rebuilding the product from the ground up, redesigning its mechanical, electrical, and optical systems entirely. The company insists the slimmer profile actually improves on its predecessor, delivering longer battery life and more accurate biometric readings.

The timing is deliberate. Oura has filed confidentially for an IPO later this year, following a funding round led by Fidelity that valued the company at $11 billion. It expects to surpass 5 million paid members by the end of this quarter — a figure that will likely anchor its public prospectus. To reach that milestone, Oura has dramatically shortened its product cycle, moving from an eighteen-month gap between Ring 4 and Ring 5, compared to three years between the two generations before it.

The Ring 5 also broadens its appeal: it now detects low-impact workouts like Pilates more reliably, tracks GLP-1 medication use in a nod to the Ozempic era, and layers optional AI-powered health guidance on top of its existing subscription through a partnership with Counsel Health.

Yet Oura's long-held dominance is under real pressure. RingConn's Gen 3 began shipping the day after the Ring 5 announcement. Ultrahuman's Ring Pro arrives in mid-July. As a company that makes essentially one product, Oura has no diversification to cushion the blow if rivals close the gap. The IPO filing signals that leadership believes now — before the competitive field fully matures — is the moment to lock in its position.

Oura is betting that smaller is better. The Finnish smart ring maker announced this month that its newest device, the Ring 5, has been shrunk by 40 percent—a compression that required the company to essentially rebuild the thing from the ground up, redesigning its mechanical guts, electrical systems, optical sensors, battery, and sensing architecture. The company says the slimmer profile doesn't come at the cost of what the ring actually does. If anything, Oura claims the Ring 5 runs longer on a charge and reads your body's signals more accurately than before.

The timing matters. Oura is preparing to go public later this year, and it just filed confidentially for an IPO. The company has already raised more than $900 million in funding, most recently in October from Fidelity Management & Research, which valued the business at $11 billion. Now Oura is saying it expects to have more than 5 million paid members by the end of this quarter—a number that will almost certainly feature prominently in whatever prospectus the company files with regulators.

To get there, Oura is moving faster than it ever has. The gap between the Ring 3 and Ring 4 was three years. Between the Ring 4 and Ring 5, it's roughly eighteen months. The company is also loading the new ring with features designed to appeal to a broader audience. The Ring 5 can now detect low-impact workouts like Pilates with better accuracy than before. It tracks GLP-1 medication use—a nod to the explosive popularity of drugs like Ozempic and Wegovy. And Oura has partnered with Counsel Health to offer optional AI-powered health advice layered on top of the ring's existing $6-per-month subscription, though the cost of that add-on service remains unannounced.

Oura's dominance in the smart ring category has been nearly total since the company launched its first product in 2015. But that dominance is being tested. RingConn's Gen 3 began shipping just a day after Oura announced the Ring 5. Ultrahuman's Ring Pro is set to start arriving in customers' hands in mid-July. The competitive pressure is real, and it's forcing Oura to move with urgency. The company essentially makes one product—the ring itself, plus chargers and other accessories—so there's no diversification to fall back on. Everything depends on staying ahead of rivals in a category that's still finding its footing in the broader wearables market. The IPO filing suggests Oura's leadership believes the moment to capitalize on that position is now.

The company expects to have more than 5 million paid members by the end of this quarter
— Oura
A Conversa do Hearth Outra perspectiva sobre a história
Inventor

Why shrink the ring at all? Wasn't it working fine at its current size?

Model

Size matters more than people think in wearables. A thinner ring means it feels less like you're wearing something, which means you're more likely to actually wear it every day. That consistency is everything for health tracking.

Inventor

But you had to rebuild the entire device to make it 40 percent smaller. That's a massive engineering undertaking. What was the hardest part?

Model

Probably the battery. You're trying to fit the same power into a much smaller space while also improving performance. That's not just engineering—that's physics working against you.

Inventor

The company is moving from a three-year product cycle to eighteen months. That's aggressive. What's driving that?

Model

The IPO. When you're about to go public, you need to show momentum and growth. Launching new products faster demonstrates that you're innovating, that you're not sitting still. It also lets you capture market share before competitors do.

Inventor

Speaking of competitors—RingConn and Ultrahuman are both launching rings around the same time. Does Oura still have an advantage?

Model

Brand recognition and user base, absolutely. But the advantage is narrowing. Five million paid members is impressive, but it's not insurmountable. The question is whether Oura can stay ahead of the curve once these other rings hit the market.

Inventor

What about the AI health advice partnership? That feels like a different direction for the company.

Model

It's Oura recognizing that the ring alone isn't enough anymore. People want interpretation, context, guidance. The ring collects the data, but AI turns it into something actionable. It's also another revenue stream, which matters when you're preparing to answer to shareholders.

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