After Google Exit, Fitbit Founders Build Family Health AI with Luffu

When James Park and Eric Friedman co‑founded Fitbit in 2007, they helped pioneer the wearables movement, empowering millions to take charge of their personal health through data. Nearly two decades later, the Fitbit co-founders are back with something new.

Two years after leaving Google, their new startup, Luffu, is pitched as an “intelligent family care system” that quietly uses AI to watch over multi‑generational households, surfacing issues before they turn into crises. The platform begins as a mobile app and is expected to expand into hardware in the near future.

At Fitbit, Park and Friedman helped normalize the idea that you should be able to see your own health data at a glance. With Luffu, they’re aiming at something more complex. The shared reality of family health.

In the U.S. alone, 63 million adults are now family caregivers, up 45% in a decade. Health data lives across portals, apps, calendars, lab PDFs, paper files, WhatsApp chats and half‑remembered phone calls. The founders’ core thesis is simple. The problem is that most tools are built for individuals, while real life health is collective.