Fields

Brain-Computer Interfaces

How close are implanted brain interfaces to real-world use?

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Analysis as of May 27, 2026

Is BCI funding ahead of the medicine?

A $9B valuation for Neuralink prices in a future where brain implants are routine — but today's devices help a few dozen people in trials. Our read on the gap between capital and clinical reality. (Our opinion, not investment advice.)

Our read — labelled opinion, not investment advice.
Explainer May 13, 2026

Three ways into the brain

BCIs trade off signal quality against surgical risk. Penetrating arrays (Neuralink) read the most; surface arrays (Precision) sit on the brain; vascular devices (Synchron) avoid open-brain surgery entirely. The tracker compares all three.

Milestone note Aug 2024

First high-accuracy real-time speech neuroprosthesis

Reached

UC Davis / BrainGate2 — A BrainGate2 intracortical BCI at UC Davis decoded a man with ALS's attempted speech into on-screen words and synthesized voice in real time at up to ~97-99% accuracy from a large vocabulary (NEJM) — the first speech BCI accurate enough for natural conversation. It has since been used independently at home for thousands of hours, marking the shift from lab demo to daily communication.