Clair Health, a startup founded by Stanford graduates Jenny Duan and Abhinav Agarwal, announced in June 2026 that it has raised $11.6 million to develop a wearable device designed to track hormonal health noninvasively in women. The funding round was led by Khosla Ventures, with participation from a16z speedrun, Brydge Club, Treehub, Cartan Capital, AGI House, Insiders VC, Anne Wojcicki, and Stephanie Coleman.
The device is built around 10 biosensors — including a novel biomagnetic sensor — which Clair Health says goes beyond the gyroscope, optical/PPG, and temperature sensors found in mainstream wearables like the Apple Watch. The company says this sensor array allows it to continuously monitor biomarkers across all four phases of the menstrual cycle, providing insights into inflammation, bloating, energy levels, cycle phase classification, hormonal fluctuations, and the pace of aging. The startup also aims to support women navigating perimenopause by generating data they can share with healthcare providers.
To personalize its tracking, Clair Health uses voice-based onboarding and says it has trained its own AI model to analyze voice biomarkers and determine a user’s cycle phase after a short conversation. “With our voice stack, we are giving our users a way to communicate their own problems in their own way,” Duan said. The company also has data partnerships providing access to several million electronic health records to build condition-specific models covering endometriosis, PMDD, perimenopause, and other issues.
Duan said the idea grew from her work at a nonprofit in Portland, Oregon, and a Stanford course on women’s health where she met Agarwal. The startup is currently testing with a closed beta group and plans to ship units in November 2026 at $369, paired with a $9.99 monthly subscription. Preorders are open now.
Treehub investor Mary Minno noted that hormonal health measurement today still commonly requires blood draws, suggesting Clair Health’s device could offer a less invasive alternative for tracking hormonal changes over time.
Source: TechCrunch