Backed by Tether Investments, the smart mattress startup hits a $1.5B valuation as it expands globally and explores FDA-approved health tech.
Eight Sleep raises fresh capital as sleep tech heats up
Sleep technology startup Eight Sleep has raised $50 million in a strategic funding round led by Tether Investments, bringing the company’s valuation to $1.5 billion.
The new funding follows a $100 million round last August backed by investors including HSG, Valor Equity Partners, Founders Fund, and Y Combinator.
The company has now raised more than $310 million in total, according to Crunchbase.
- Latest funding: $50M strategic round
- Current valuation: $1.5B
- Total funding raised: $310M+
Eight Sleep’s last disclosed valuation dates back to 2021, when its $86 million Series C valued the company at $500 million post-money.
From smart mattresses to global expansion
Eight Sleep built its reputation on smart mattress accessories that track sleep patterns and automatically regulate bed temperature throughout the night.
The system collects biometric data while users sleep and adjusts the environment accordingly.
Its products are now available in more than 34 countries, reflecting the company’s steady push into international markets.
The new funding will support several initiatives:
- New product development
- Global market expansion
- Clinical validation of sleep technologies
Eight Sleep also reported that it became free-cash-flow positive in 2025, a milestone many hardware startups struggle to reach.
A push toward medical-grade sleep technology
Beyond consumer gadgets, the company wants to position itself as a health technology platform.
Eight Sleep is currently pursuing U.S. Food and Drug Administration (FDA) approval for technology designed to detect and mitigate sleep apnea.
If approved, it could shift the company from lifestyle products into regulated health tools.
CEO and co-founder Matteo Franceschetti described the broader ambition in a company statement:
“What we’re building doesn’t exist yet — a system that understands your body better each night and acts on that knowledge.”
He added that the long-term goal is to build “the defining health technology company of this generation.”
Building an AI agent for sleep optimization
At the center of Eight Sleep’s roadmap is an AI-powered sleep agent designed to optimize rest automatically.
The system would control:
- Bed temperature
- Mattress elevation
- Firmness adjustments
The agent analyzes historical sleep data and simulates multiple sleep scenarios before bedtime, preparing the mattress for optimal conditions.
Eight Sleep says its AI models are trained on proprietary sleep datasets.
Early pilots suggest the system can also influence user behavior. Participants reportedly changed habits such as:
- Exercise timing
- Caffeine consumption
- Sleep schedules
All based on insights generated by the company’s app.
Expanding the product ecosystem
Eight Sleep has also expanded its hardware lineup.
Last year the company launched:
- A hydro-powered blanket that regulates temperature
- A pillow cover designed to control heat around the head and neck
The strategy mirrors what companies like Apple or Peloton have done—build a tightly integrated hardware and software ecosystem around daily habits.
In this case, the habit is sleep.
Competition and reliability challenges
Eight Sleep operates in a competitive market spanning both sleep tracking and temperature-controlled bedding.
Its competitors include:
- BedJet and Chilipad in temperature-controlled mattress systems
- Oura and Whoop in biometric sleep tracking
The company also faced a public setback last October when an AWS outage disrupted connectivity for its smart mattress accessories.
Because the devices relied on cloud servers, some beds stopped regulating temperature and overheated.
Eight Sleep later introduced an “outage mode” so products can continue operating during connectivity failures.
The incident highlighted a growing challenge for connected hardware: when the cloud goes down, even your bed might stop working.
TL;DR:
Sleep tech startup Eight Sleep raised $50M from Tether Investments, valuing the company at $1.5B. The firm plans global expansion, new AI-driven sleep products, and FDA approval for sleep apnea detection. Its smart mattress ecosystem now ships to 34+ countries.
AI summary
- Eight Sleep raised $50M at a $1.5B valuation.
- Total funding now exceeds $310M.
- The company is free-cash-flow positive as of 2025.
- Plans include AI-powered sleep agents and FDA approval for sleep apnea tech.
- Competes with BedJet, Chilipad, Oura, and Whoop.
