Sleep was just the beginning, Eight Sleep’s CEO says. Armed with a billion hours of data, the startup is aiming to enter “every dimension of personal health”
Eight Sleep has closed a $50 million strategic round led by Tether Investments, valuing the company at $1.5 billion, and it’s using the moment to announce something more ambitious than a better night’s sleep through its high-tech mattress covers.
The funding, reported by TechCrunch, will support Eight Sleep’s push into predictive health, drawing on more than one billion hours of real-world sleep data collected from users across 35-plus countries.
Notably, it marks Tether Investments’ first foray into fitness and wellness. The firm is the investment arm of Tether, the cryptocurrency stablecoin launched in 2014. The funding comes on the heels of the Tether’s launch of QVAC health, a private health dashboard that protects user data and will serve as the type of tech that will be integrated into Eight Sleep’s products.
While Eight Sleep has historically tracked sleep stages, heart rate and HRV through its smart-mattress system, the new system intends to get ahead of it. Rather than responding to disrupted sleep as it happens, the Pod would factor in variables like room temperature, exercise timing, meal size and stress levels to optimize the sleep environment before the user ever pulls back the covers.
The sleep fitness company has also begun pushing into regulated health territory, filing with the Food and Drug Administration for sleep apnea detection and mitigation capabilities.
If cleared, Eight Sleep’s Pod would cross a meaningful milestone from a rest-supporting wellness product to a device that can detect and intervene when needed.
“Sleep was just the beginning,” Eight Sleep co-founder and CEO Matteo Franceschetti said. “We’ve built the most advanced AI-powered health sensing system in the world — one that learns your body better every night and acts on that knowledge. This investment gives us the resources to take that intelligence beyond the bedroom and into every dimension of personal health.”
It’s an area Eight Sleep has already begun staking out, having launched Hot Flash Mode, which uses cooling to ease menopause-related symptoms. Earlier this year, the company inked a deal with the Aston Martin Aramco Formula One team, putting its pods in the beds of drivers to optimize their recovery.
Eight Sleep says the move follows a strong 2025, when the company reached free cash flow positivity and launched three new products, led by the Pod 5, which bundles temperature regulation, automatic elevation, ambient soundscapes, zero-gravity positioning to reduce snoring and contact-free cardiovascular monitoring.
The startup also plans to deepen its global commercial partnerships.
The new round arrives as sleep has become one of the most lucrative spaces in consumer health and even tourism, as seen with Equinox Hotel’s investment in sleep-optimized rooms.
One survey from Amerisleep found that 43% millennials are burning PTO just to catch up on sleep. They are also spending to improve it: cooling mattress pad sales are up 50% and sleep headphone sales have surged 184% year-over-year, according to Klarna purchase data.
This article has been updated to include the funding amount and additional details on Tether.
