Key takeaway: While high-bandwidth intracortical Brain-Computer Interfaces (like Neuralink or Paradromics) dominate the news, they are strictly locked inside early-feasibility FDA clinical trials with fewer than 50 human patients combined globally. However, other forms of neurotechnology have already been massively commercialized, generating billions of dollars in revenue and treating millions of humans right now.
1. FDA-Approved Medical Implants
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Sensory Prosthetics
Restoring base physiological senses.
- Cochlear Implants: The most successful commercial neuroprosthetic on earth. Over 1,000,000 implants have been sold globally (major companies include Cochlear Ltd, Med-El, and Advanced Bionics).
- Retinal Implants: Devices like the Argus II (Second Sight) achieved FDA commercial approval but struggled deeply with market viability (the company ultimately ceased production, leaving blind patients with unsupported hardware in their eyes—a major cautionary tale in neuro-business).
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Neuromodulation Devices (Brain Pacemakers)
Treating movement and mood disorders.
- Deep Brain Stimulation (DBS): Hundreds of thousands of patients with Parkinson's Disease or Essential Tremor have actively walking around with commercial DBS pacemakers implanted by Medtronic, Boston Scientific, and Abbott. FDA approved and reimbursable by Medicare/Insurance.
- Responsive Neurostimulation (RNS): NeuroPace sells a fully commercialized, closed-loop implant that is surgically embedded in the skull. It actively records continuous ECoG data on a hard drive, perfectly predicts the onset of a seizure, and fires a tiny jolt of electricity to stop the seizure before the patient even knows it happened.
- Vagus Nerve Stimulation (VNS): Approved for both refractory Epilepsy and Treatment-Resistant Depression. LivaNova dominates this commercial space.
2. Direct-to-Consumer (DTC) Wearables
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Consumer EEG Headsets
Meditation, Focus, and Research.
- Devices like the Muse Headband or Emotiv Epoc are wildly popular consumer goods. Using dry electrodes on the forehead, they passively read Alpha/Beta brainwaves and stream them to your smartphone via Bluetooth to guide meditation apps or track focus levels.
- OpenBCI supplies extremely popular open-source, maker-friendly EEG/EMG hats (like the Ultracortex) to thousands of neuroscience students and game developers globally for hundreds of dollars, completely bypassing medical FDA hurdles by selling "research tools."
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Consumer Neuromodulation (tDCS/tES)
Writing signals to the brain at home.
- The DTC market for electrical brain stimulation is booming. Startups like Flow Neuroscience and Fisher Wallace sell tDCS (transcranial Direct Current Stimulation) headsets directly to consumers in Europe and the US as depression/anxiety treatments.
- Other companies target cognitive enhancement: selling electrical headsets designed to induce "flow states" for competitive eSports gamers, or headsets explicitly designed to stimulate the brain precisely during Deep Sleep cycles to permanently consolidate memories and enhance learning.
3. Non-Invasive Clinical Therapeutics
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Transcranial Magnetic Stimulation (TMS)
Outpatient magnetic modulation.
- TMS is a massively scaled commercial industry (led by companies like Brainsway or Magstim). Clinics are ubiquitous across major cities. Patients sit in a chair for 20 minutes a day while a powerful magnetic wand fires targeted electromagnetic pulses deep into the Dorsolateral Prefrontal Cortex.
- It is fully FDA-approved and widely insured as a frontline treatment for Major Depressive Disorder (MDD) and OCD, representing billions of dollars in healthcare expenditure without a single drill hole required.