What Is Oura and Why Its Smart Ring Is Challenging Apple Watch and Fitbit

Oura is a Finnish health‑technology company best known for the Oura Ring, a smart ring designed to continuously monitor health metrics such as sleep, activity, and recovery. Founded in 2013 in Oulu, Finland by Petteri Lahtela, Kari Kivelä, and Markku Koskela, the company has grown into one of the most recognizable brands in the emerging smart‑ring wearable category.

Over the past few years, Oura has scaled quickly—selling millions of rings worldwide, launching new AI‑powered health features, and preparing for a potential public listing in the United States.

What Oura Is and What the Oura Ring Does

The Oura Ring is a wearable health device that looks like a simple metal ring but contains multiple sensors designed to track physiological signals around the clock. Instead of presenting data on a screen, the ring syncs with a smartphone app that analyzes biometric signals and provides health insights.

Core metrics tracked by the Oura Ring include:

• Sleep quality and sleep stages
• Physical activity and daily movement
• Heart rate and heart rate variability
• Body temperature trends
• Blood oxygen levels and respiratory signals
• A daily “readiness” score reflecting recovery and stress

These metrics allow the app to estimate how well the body has recovered from sleep, exercise, illness, or stress. The device is widely used for sleep tracking and long‑term health monitoring rather than real‑time workout feedback.

How Oura Differs From Apple Watch, Fitbit, and Garmin

The biggest difference between Oura and most popular wearables is form factor and purpose.

Traditional wearables such as Apple Watch, Fitbit, and Garmin are wrist‑based devices with displays and interactive apps. They emphasize notifications, fitness tracking, and smartwatch features like messaging or music control.

Oura takes a different approach:

• Screenless design: The ring has no display and focuses entirely on sensing biometrics.
• Passive tracking: Data is collected continuously without requiring the user to interact with the device.
• Sleep and recovery focus: While it tracks activity, Oura’s analytics are heavily centered on sleep quality, stress, and physiological recovery.

Because of its small size and lack of a screen, many users wear the ring 24 hours a day, including while sleeping, which helps Oura collect consistent long‑term health data.

How Many Rings Oura Has Sold—and How Fast It Grew

Oura’s growth has accelerated rapidly in recent years.

• The company has sold about 5.5 million rings globally.
• Sales jumped sharply from around 2.5 million devices in mid‑2024 to 5.5 million within about a year.
• More than half of those total sales occurred within the most recent year, reflecting a surge in demand for smart rings.

The business model combines hardware sales with a subscription membership that unlocks deeper analytics and insights in the Oura app. Some estimates suggest revenue surpassed $500 million in 2024 and could exceed $1 billion in 2025 as adoption expands.

Series E Funding and Valuation

Oura raised one of the largest funding rounds in the wearable‑tech sector in its Series E financing.

• The company raised about $875 million to $900 million.
• The round valued Oura at roughly $11 billion.
• That valuation more than doubled its roughly $5.2 billion valuation from late 2024.

The funding helped the company expand manufacturing, develop new health features, and grow its global distribution channels.

Oura’s New AI Model for Women’s Health

In 2026, Oura introduced its first proprietary AI model focused on women’s health. The model powers the company’s AI assistant, Oura Advisor, and is designed to deliver personalized insights based on biometric signals collected by the ring.

The system analyzes physiological data to provide guidance across the reproductive health spectrum, including topics such as:

• Menstrual cycle tracking
• Fertility insights
• Pregnancy trends
• Menopause‑related changes

The feature is being tested through Oura Labs, the company’s experimental feature hub inside the Oura app.

Why Oura Is Preparing for a Potential IPO

In 2026, Oura confidentially submitted a Form S‑1 filing with the U.S. Securities and Exchange Commission, an early step toward a potential initial public offering (IPO).

Companies often file confidentially so they can work with regulators and refine financial disclosures before releasing them publicly.

The timing reflects several favorable trends for Oura:

• Rapid growth in smart‑ring adoption
• Millions of devices already sold worldwide
• A high valuation after its Series E round
• Expanding subscription revenue and AI features

If the IPO proceeds, Oura could become one of the most prominent public companies focused on wearable health technology beyond the smartwatch category.

The Bigger Trend: Smart Rings as the Next Wearable Category

Oura’s success has helped push smart rings into the mainstream wearable market. By focusing on unobtrusive, continuous health monitoring rather than smartwatch functionality, the company has carved out a niche centered on sleep science, recovery, and long‑term biometric tracking.

With millions of devices already in circulation and new AI‑driven health features emerging, the company’s planned public listing suggests the smart‑ring category may be entering its next phase of growth.