Sleep tech firm Eight Sleep at the moment stated that it has raised $50 million in a strategic spherical led by Tether Investments at a valuation of $1.5 billion. This new spherical comes after the startup closed a $100 million spherical final August from traders similar to HSG, Valor Fairness Companions, Founders Fund, and Y Combinator.
The startup, which sells sensible mattress equipment that may monitor your sleep patterns and modify temperatures as you sleep, didn’t disclose its valuation for the earlier spherical, nevertheless it was valued at $500 million post-money in 2021 when it raised an $86 million Collection C led by Valor Fairness Companions. The corporate has raised over $310 million so far, in keeping with Crunchbase.
Eight Sleep stated it was free-cash-flow constructive in 2025, and plans to make use of the brand new funding for brand spanking new merchandise, international expansions, and medical validation. The corporate presently ships its merchandise to over 34 international locations.
The corporate stated it desires to increase past promoting shopper merchandise, and has sought approval from the U.S. Meals and Drug Administration for merchandise that may detect and mitigate sleep apnea.
“What we’re constructing doesn’t exist but — a system that understands your physique higher every evening and acts on that information. Our aim is to construct the defining well being expertise firm of this technology,” Matteo Franceschetti, co-founder and CEO of Eight Sleep, stated in an announcement.
The corporate stated that it desires to work on a sleep-focused AI agent that controls the temperature, elevation and firmness of its merchandise proactively and prevents sleep disruption. It stated that the agent simulates many eventualities earlier than customers get into mattress and prepares its merchandise for optimum sleep.
Eight Sleep stated that its fashions are skilled on proprietary knowledge, and early pilots of its AI-driven steering have resulted in individuals altering their habits, similar to train timing, caffeine consumption or sleep schedules, based mostly on the evaluation offered by the app.
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Final yr, the corporate launched a hydro blanket that controls temperature, and a new pillow cowl that may present temperature management for the top and neck.
Eight Sleep was caught in an argument final October when customers’ mattress equipment stopped working due to an AWS outage as they couldn’t connect with its servers. The beds overheated, and the corporate had to add an “outage mode” to its merchandise for such conditions.
Eight Sleep competes with the likes of BedJet and Chillpad on the mattress and temperature management entrance, and with Oura and Whoop within the sleep monitoring market.

