Oura is going public, but these smart ring companies are coming for its crown

Oura filed for an IPO on September 3 after its nine-month revenue rose to $1.21 billion and it sold 3.6 million rings, giving it about 5 million paid members and recently launching the slimmer Ring 5. Competitors are targeting Oura’s lead: France’s Circular will add NFC payments and FDA-cleared ECG in its Ring 3 series, China’s RingConn offers haptic alerts and vascular-strain monitoring, and India’s Ultrahuman raised $70 million to ship a $479 Ring Pro with a dual-core processor and upgraded heart-rate sensing.