Tether’s venture arm has invested in Eight Sleep at a $1.5 billion valuation to accelerate AI-driven health technology, the companies announced Wednesday. The funding establishes a long-term partnership that will see Eight Sleep integrate Tether’s QVAC architecture into its devices and services.
QVAC Health is a newly launched Tether platform that aims to gather fitness and wellness data from multiple wearables and inputs into a single encrypted environment that does not depend on third-party cloud providers. The platform is designed to enable on-device, privacy-focused computation and personalized insights.
Tether CEO Paolo Ardoino said the firm believes advanced, personalized AI can surface actionable insights about core health metrics and extend human potential. He characterized Eight Sleep as well positioned to lead in longevity-focused tech by building adaptive, on-device systems that help people optimize sleep, recovery, and overall well-being.
The investment follows a prior $100 million round for Eight Sleep that included investors such as HSG, Valor Equity Partners, Founders Fund, Y Combinator, and Formula 1 figures Charles Leclerc and Zak Brown.
New York–based Eight Sleep is known for smart mattress systems that use embedded sensors and machine learning to adjust temperature and monitor physiological signals in real time. With the Tether collaboration, the company plans to expand beyond sleep tracking into broader health applications enabled by on-device AI and encrypted data management.
“Sleep was just the beginning,” said Matteo Franceschetti, co-founder and CEO of Eight Sleep, describing the partnership as providing infrastructure to extend the company’s intelligence beyond the Pod and into many aspects of personal health.
Tether Investments, based in El Salvador, channels profits from the stablecoin issuer into sectors including artificial intelligence, energy, biotechnology, and financial services.
Editorial note: This article was edited by Vivian Nguyen. For information about our editorial process, see our Editorial Policy.