Clair Health raises $11.6 million to track hormones

Stanford cofounders Jenny Duan and Abhinav Agarwal’s Clair Health raised $11.6 million in seed funding to build a hormone-tracking wearable, framing women’s health as a blind spot in the $100 billion wearables market. The company plans to support research and

The bracelet didn’t just sell out—Clair Health says its first production run of 5,000 devices is already gone, and more than 25,000 people have signed up to wait their turn.

For the team behind it, that demand is the clearest signal yet that there’s a gap in mainstream wearables—one built around women’s health.

Clair Health. a San Francisco startup co-founded by 22-year-old CEO Jenny Duan and 24-year-old CTO Abhinav Agarwal. has raised $11.6 million in seed funding to develop a wearable device that tracks women’s hormones. The company is pitching its bracelet as a more direct way to monitor hormones tied to fertility. menopause. and overall health.

Duan argues the market has historically treated the area as niche. “Historically, we’ve seen this category as something that’s been deemed niche,” she said. “It’s about time that a company really with women’s health at its core starts building towards this mission.”

Agarwal pushes the core logic further: “If hormones are the underlying operating system of women’s health, then why is there not a better way of tracking them?”

Clair Health is entering a crowded wearables landscape. Competitors including Oura, Whoop, and Fitbit have added women’s health features in recent years, including cycle tracking. Clair says it wasn’t designed as a refinement of that approach. Instead. it is built around monitoring hormones—using a proprietary math model that maps how the brain and ovaries work together to regulate hormones.

The seed round was led by Khosla Ventures, with participation from a16z Speedrun, Brydge Club, Treehub, Cartan Capital, AGI House, Insiders VC, and Anne Wojcicki.

Clair says the new funding will back additional research and accelerate the launch of the device and its companion app in November. The company has seven full-time employees and about 14 contract and part-time workers, Agarwal said.

Price is part of the early bet. Clair’s first orders were priced at $295 and included a free subscription to the app. The company says the device will ultimately retail for $369, with a paid subscription required.

The founders’ paths to the company began at Stanford. Duan and Agarwal met during a spring break trip organized by Stanford and connected over shared interests. Duan previously worked in women’s health advocacy and nonprofit work, while Agarwal had worked on a glucose-monitoring startup.

Since the fundraising announcement, the company is also offering a rare glimpse into its financing story: the pitch deck used to raise its $11.6 million seed. Slides have been redacted so the deck can be shared publicly.

In one of the clearest signs that investors see a real commercial opening. Clair’s early customer behavior is being matched by attention from major seed backers. The company’s sold-out first run and long waitlist don’t prove a market is ready—but they do suggest that for thousands of people. the question Duan and Agarwal are asking isn’t theoretical anymore.

Clair Health Jenny Duan Abhinav Agarwal seed funding wearable device hormones women's health Khosla Ventures a16z Speedrun wearable market fertility menopause