SOND, a sleep tech startup founded by Bose's former Head of Sleep, exits stealth with $7 million in funding and introduces Dreambuds earbuds.

SOND emerged from stealth on Wednesday with $7 million in funding from E14 Fund, Crosslink Capital, Ubiquity Ventures, Alumni Ventures, Meach Cove Capital, and Boston Scientific co-founder John Abele. The startup was founded in February 2022 by CEO Yadid Ayzenberg, formerly Bose's Head of Sleep Products, and co-founder Amir Lazarovich, formerly a senior software engineering manager at Google.

Dreambuds is a closed-loop, in-ear system that captures 12 physiological signals—including respiration, heart rate variability, sleep staging, body position, and snoring—and sends them to a cloud-based AI sleep coach that selects or generates audio programs in real-time. The charging case includes Wi-Fi, Bluetooth, an OLED display, physical buttons, and a speaker, so the system runs without requiring a phone.

The AI coach learns which sleep programs work best for each user over time and responds to voice commands via a double-tap gesture. Users can also review sleep data and hypnograms (sleep cycle graphs) in a companion app. SOND has run comfort studies and betas, and aims to bring Dreambuds into mass production by Q2 2026 following a crowdfunding campaign.