Plate I · EEG Headbands & Neurofeedback
NextSense Smartbuds
World's first truly wireless in-ear EEG earbuds for active sleep improvement — combines passive EEG monitoring with timed audio neuromodulation to increase slow-wave sleep; USA Today Top Pick at CES 2026
· Not yet tested
Pub · 2026-06-25 · Editorial review pending hands-on testing.
WELLNESS
Marketed as a general wellness device. Not FDA cleared, approved, or evaluated for any medical claim.
Visit NextSense Smartbuds →
From $399
Fig. I · Bench readout
Key facts at a glance.
- Founded
- 2019
- Headquarters
- San Francisco, CA, USA (spun out of Google X)
- Price range
- $399–$400
Fig. II · Cost of ownership
The real price over three years.
NextSense Smartbuds · 3-year horizon
Total cost of ownership · 3yr
| Hardwareone-time | $399 |
| Subscription$14.99/mo × 36mo | $539.64 |
| Consumables$179.88/yr × 3yr | $539.64 |
| 3-year total | $1,478.28 |
Fig. III · Key features
What the device does.
- + Six in-ear EEG sensors with true wireless (TWS) form factor
- + Precisely timed binaural audio stimulation to guide brain into deeper slow-wave sleep
- + Real-time sleep staging and brainwave monitoring during sleep
- + 106-night beta study: statistically significant increase in slow-wave activity
- + Active sleep improvement (interventional) — not passive tracking only
- + Fit Kit subscription for ear tip refills ($14.99/month)
- + iOS and Android companion app
- + Pre-order price $249; retail $399.99
Fig. IV · Strengths & weaknesses
The trade-offs.
↑ Pros
- + Six in-ear EEG sensors with true wireless (TWS) form factor
- + Precisely timed binaural audio stimulation to guide brain into deeper slow-wave sleep
- + Real-time sleep staging and brainwave monitoring during sleep
- + 106-night beta study: statistically significant increase in slow-wave activity
- + Active sleep improvement (interventional) — not passive tracking only
↓ Cons
- − Ear-consumable subscription adds recurring cost
- − Beta trial (106 nights) is promising but not yet peer-reviewed
- − In-ear form factor may cause discomfort during sleep for some users
- − Limited independent long-term accuracy benchmarks vs. PSG
- − New brand with limited track record post-Google X spin-out
Fig. V · Best for
Sleep-improvement seekers, biohackers frustrated with forehead EEG headbands, shift workers, and people with chronic sleep issues who want passive nightly improvement rather than tracking