NextSense
- Company typePrivate
- Founded2021
- HeadquartersMountain View, United States
- Headcount11–50
- GTM typeB2C
- OfferingHardware or Manufacturing
What NextSense does
NextSense is a Mountain View, California-based neurotechnology company founded in 2020-2021 as a spinout from Alphabet's X (the Moonshot Factory). The company develops clinical-grade in-ear electroencephalography (EEG) hardware embedded in a wireless earbud form factor, targeting the $585 billion global sleep economy. Its flagship product, NextSense Smartbuds, features six dry-contact EEG sensors operating at a 1,000 Hz sampling rate in a 5-gram device with no gel or setup required. The product was commercially launched in February 2026 after a two-year CES pre-launch buildup, with two consecutive appearances at CES (2025 as "Tone by NextSense," 2026 as Smartbuds) and membership in the National Sleep Foundation's SleepTech Network.
The underlying platform combines real-time neural signal processing with closed-loop adaptive audio stimulation (pink noise and proprietary soundscapes) that detects sleep stages and delivers precisely timed acoustic cues to enhance slow-wave (deep) sleep. The system has been validated against polysomnography (kappa = 0.73 for sleep stage classification) and medical-grade EEG (86.4% seizure detection sensitivity across 1,255 hours and 20 epilepsy patients). AI/ML capabilities are foundational rather than additive — the device personalizes stimulation timing based on individual neural pattern learning and processes multimodal EEG plus motion data.
NextSense operates a hardware-plus-mandatory-subscription business model. Smartbuds retail at $199 early-bird (regular $349) with a required $14.99/month Fit Kit subscription providing replacement silicone tips and wings that house the EEG sensors and degrade with use. Replacement parts are also sold standalone ($60-$150). The company serves three customer segments: health-conscious consumers (primary, 2,847+ verified sleepers), academic research institutions (Emory, Stanford, Harvard, Mayo Clinic, MUSC), and pharmaceutical companies for clinical trial endpoints. Revenue grew from $1M in 2022 to an expected record in 2025, supported by an oversubscribed $16M Series A led by Ascension Ventures in November 2025.
NextSense firmographics
Firmographics- Name
- NextSense
- Legal name
- NextSense, Inc.
- Website
- https://nextsense.io
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Ownership category
- akta.pro rank
NextSense industry classification
Industry- Product category
- Wearable EEG Sleep Technology
- NAICS
- Electromedical and Electrotherapeutic Apparatus Manufacturing (334510)
- SIC
- Electromedical & Electrotherapeutic Apparatus (3845), Household Audio & Video Equipment (3651)
- akta.pro primary industry
- Sleep Tech Wearables (CRACAIAG)
- akta.pro secondary industries
- Hearables (True Wireless Earbuds & Smart Headphones) (CRACAIAD), Mental Wellness & Stress Management Devices (Biofeedback, Meditation/Neurostimulation Devices) (CRACAQAL)
Keywords
Where NextSense is headquartered
LocationHeadquarters
- HQ city
- Mountain View
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
NextSense business model
Business model- GTM type
- B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Supply Chain, Personnel, Marketing or Sales, Operations
Revenue model
- Smartbuds Hardware Sales: One-time hardware purchase of EEG earbuds. Launch price $199-$399 depending on promotions, regular price $349. Hardware provides core brain-sensing functionality.
- Fit Kit Subscription: Mandatory monthly subscription ($14.99/month) for replacement ear tips and wings. Components are electrodes that wear out and require regular replacement to maintain signal quality. Also includes connectivity and ongoing sensor maintenance.
- Replacement Parts: Standalone purchase of replacement tips and wings in various supply quantities ($60 for 90 sleeps, $100 for 180 sleeps, $150 for 365 sleeps). Available as add-on purchases for users.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | Smartbuds - Early Bird Launch |
| One time/ perpetual license | Pay-as-you-go | Smartbuds - Regular Price |
| Subscription | Monthly | Fit Kit Monthly Subscription |
| Unit Pricing | Pay-as-you-go | Replacement Tips & Wings - 90 Sleeps |
| Unit Pricing | Pay-as-you-go | Replacement Tips & Wings - 180 Sleeps |
| Unit Pricing | Pay-as-you-go | Replacement Tips & Wings - 365 Sleeps |
Go-to-market motion3 records
Distribution channels3 records
Marketing channels9 records
NextSense product offering
Product offeringCore offering
NextSense designs, manufactures, and sells Smartbuds — wireless earbuds with six clinical-grade dry-contact EEG sensors that monitor brain activity in real time during sleep and deliver adaptive audio stimulation to enhance deep (slow-wave) sleep. The product is sold direct-to-consumer at $199-$399 with a mandatory $14.99/month Fit Kit subscription for replacement tips and wings, supported by an iOS companion app for sleep insights, meditation, and focus use cases.
Product overview
NextSense offers a single primary product platform (Smartbuds) with a consumables/accessories ecosystem. Smartbuds are truly wireless EEG earbuds featuring six clinical-grade dry-contact sensors that monitor brain activity during sleep and deliver adaptive audio stimulation to enhance deep sleep. The core product is supported by a subscription service (Fit Kit) providing regular replacement tips and wings to maintain sensor quality, plus individual accessory purchases for the ear tips and wings separately. The company positions Smartbuds as consumer wellness technology rather than medical devices, targeting the estimated $585 billion global sleep economy.
Differentiator
Problem solved
Functional benefit
Products and services
- NextSense Smartbuds Wireless EEG earbuds with six clinical-grade dry-contact sensors that monitor brain activity during sleep at 1,000 Hz in a 5-gram form factor, with closed-loop adaptive audio stimulation to enhance deep (slow-wave) sleep. Provides real-time neural oscillation detection, slow-wave enhancement, and personalized sleep insights through a companion app. Sold to individual consumers for sleep, meditation, and focus use cases.
- Fit Kit Subscription Monthly subscription service at $14.99/month providing regular replacement silicone tips and wings for Smartbuds. Required to maintain EEG sensor effectiveness, signal quality, and hygiene because silicone components degrade over time. Includes connectivity and ongoing sensor maintenance support.
- Replacement Tips & Wings Standalone purchase of replacement silicone ear tips and wings for Smartbuds in 3-pack (90 sleeps, $60), 6-pack (180 sleeps, $100), or 12-pack (365 sleeps, $150) supply quantities. Tips sit inside the ear canal and contain in-canal sensors; wings anchor the earbud in the outer ear and contain outer EEG sensors. Required to maintain EEG signal quality.
Quantifiable outcome
- Up to 2x more deep sleep reported with Smartbuds use
- +4 more outcomes
Companies that use NextSense
Customer profileNamed customers1 record
Segments3 records
Ideal customer profiles3 records
NextSense technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability7 records
Feature5 records
NextSense partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core.
- National Sleep FoundationcoreNextSense is a member of NSF's SleepTech Network and featured in SleepMark Education Program at CES 2026. The SleepMark program recognizes consumer sleep products meeting evidence-based guidelines and standards.
- Digital Medicine Society (DiMe)coreNextSense joined DiMe's Core Digital Measures of Sleep project as a founding contributor. CEO Jonathan Berent is co-author of foundational paper on digital sleep measurement standards. Collaboration shaped product metrics approach.
- Emory UniversitycoreMajor research partnership including multiple IRB-approved studies. Researchers include Dr. Gari Clifford (Chair of Biomedical Informatics), Dr. David Rye (sleep disorders expert), Dr. Allan Levey (Alzheimer's research), and Dr. Lynn Marie Trotti (Emory Sleep Center Director). Studies validate ear-EEG for seizure and sleep detection.
- Stanford UniversitycoreResearch partnership with Todd P. Coleman (Associate Professor of Bioengineering) and Rafael Pelayo MD (Clinical Professor, Sleep Medicine division). Rafael Pelayo is author of 'How to Sleep' and co-winner of the 2025 Public Service Award.
- Harvard UniversitycoreAcademic research partnership collaborating on sleep and neurological research using NextSense ear-EEG technology.
- Mayo CliniccoreMulti-site clinical study partnership including Idiopathic Hypersomnia: Low-Sodium Oxybate Sleep Study using ear-EEG, actigraphy, and PSG to monitor sleep time.
- Medical University of South Carolina (MUSC)coreAcademic research partnership collaborating on sleep and neurological research using NextSense ear-EEG technology.
Scale indicators9 records
Recent moves8 records
Expansion highlights6 records
NextSense competitors and assessment
Company assessmentEmerging players
- Eight Sleep: Eight Sleep's smart mattress covers with temperature-based sleep optimization compete for sleep-tech consumer dollars and increasingly integrate biometric tracking, overlapping with NextSense's sleep-enhancement positioning.
- Somnee: Somnee offers a consumer EEG headband for personalized sleep enhancement, positioning similarly to NextSense's clinical-grade brain-measurement approach for sleep optimization.
Direct peers
- Muse: Muse sells consumer EEG headbands for meditation and sleep; it is a comparable consumer-grade brain-sensing wearable with a similar focus on neurofeedback and meditation/sleep use cases.
- Earable Neuroscience: Earable makes the FRENZ brainband, an ear-worn wearable delivering audio stimulation for sleep and focus; it directly competes with NextSense's ear-EEG neurostimulation approach and co-featured in the National Sleep Foundation SleepMark program at CES 2026.
- Dreem: Dreem builds EEG-based headbands for sleep monitoring and enhancement; it is the closest historical competitor to NextSense's clinical-grade EEG sleep positioning, though Dreem uses a headband form factor rather than earbuds.
- Apollo Neuro: Apollo Neuro produces a wearable that delivers low-frequency vibrations for stress and sleep improvement; it competes in the consumer neurostimulation-for-sleep category that NextSense enters with audio stimulation.
- Kokoon: Kokoon produces sleep-focused EEG headphones that monitor brain activity and adapt audio; it overlaps directly with NextSense's closed-loop audio stimulation and in-ear sleep tracking proposition.
Broad incumbents
- Oura: Oura's smart ring dominates the premium consumer sleep-tracking category; it competes with NextSense for the same health-conscious consumer sleep dollar, but measures sleep via proxies (HR, motion, temperature) rather than direct EEG.
- Whoop: Whoop's fitness band with subscription-based recovery and sleep tracking is a direct competing wearable subscription model targeting the same performance- and wellness-oriented consumer segment.
Regional players
- Beacon Biosignals: Beacon Biosignals provides EEG analytics for sleep and neurological research with pharma partners; it overlaps with NextSense's enterprise/research B2B motion and academic clinical partnership strategy.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
NextSense social profiles
Digital presenceNextSense compliance and trust
Trust signalCompliance1 record
NextSense financial estimates
Financial estimateRevenue estimate
Valuation estimate
NextSense leadership team
Management profileNumber of profiles
Profiles5 records
NextSense funding detail
Funding detailFunding overview
Funding rounds5 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
NextSense M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about NextSense
What does NextSense do?
NextSense designs, manufactures, and sells Smartbuds — wireless earbuds with six clinical-grade dry-contact EEG sensors that monitor brain activity in real time during sleep and deliver adaptive audio stimulation to enhance deep (slow-wave) sleep. The product is sold direct-to-consumer at $199-$399 with a mandatory $14.99/month Fit Kit subscription for replacement tips and wings, supported by an iOS companion app for sleep insights, meditation, and focus use cases.
Is NextSense a public or private company?
NextSense is a private company. It is classified as venture growth investor backed and is currently operating.
When was NextSense founded?
NextSense was founded in 2021. It employs 11 to 50 people.
Where is NextSense based?
NextSense is headquartered in Mountain View, United States, in the North America region.
How does NextSense make money?
Three revenue lines are on record. Smartbuds Hardware Sales are the primary driver. The others are fit Kit Subscription and replacement Parts.
Who are NextSense's main competitors?
Emerging players on record are Eight Sleep and Somnee. Direct peers are Muse, Earable Neuroscience, Dreem, Apollo Neuro and Kokoon. Broad incumbents are Oura and Whoop. Beacon Biosignals is listed as a regional player.
Does NextSense have an API?
No public API is recorded for NextSense.
What industry is NextSense in?
NextSense's product category is Wearable EEG Sleep Technology. Its primary akta.pro industry code is CRACAIAG, Sleep Tech Wearables, with a secondary code of CRACAIAD, Hearables (True Wireless Earbuds & Smart Headphones). Its NAICS code is 334510 and its SIC code is 3845.