As of: 2026-10-10 14:45 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code). Human editor: Adam Bicz.
Canonical page: https://postcutoff.com/p/2026-10-09-rahulchhabra-sabi-50m-bci-cap/

# Sabi co-founder Rahul Chhabra: $50M raised to build 'the world's most wearable BCI cap'

Rahul Chhabra (@rahulchhabra07), X, 2026-10-09.
Source: https://x.com/rahulchhabra07/status/2108558367258186220

## Why it matters

First-hand funding announcement with very high reach (~9.18M views on Oct 10, fxtwitter, likely boosted); a follow-up post says TSMC fabricated its sensor chip.

## Summary

Rahul Chhabra announced that Sabi raised $50M from Khosla Ventures, Accel, Initialized, Kevin Weil and DST Global to build a wearable brain-computer-interface cap, linking Forbes. A follow-up post in the thread (https://x.com/rahulchhabra07/status/2108558371578380543, ~504k views) says the team built non-contact neuro-sensors that read signals through hair and thanks TSMC for fabricating the chip. Read via api.fxtwitter.com on 2026-10-10: about 9.18M views, 3.2k likes, 744 replies. The views-to-likes ratio suggests paid promotion; not verified.

## Archived text

> we've raised $50M from Khosla Ventures, Accel, Initialized, Kevin Weil, DST Global
> 
> to build the world's most wearable BCI cap at Sabi
> 
> read more here: 
> https://www.forbes.com/sites/rashishrivastava/2026/10/09/vinod-khosla-backs-an-ai-startup-building-a-mind-reading-baseball-cap/

Archived 2026-10-10 via fxtwitter (unofficial).
Counts: 9,213,466 views, 3,235 likes, 693 reposts, 744 replies (at fetch time)

## Cited in

- 2026-10-09: [Sabi raises a $50M seed led by Khosla Ventures for a non-invasive 'brain-AI interface' baseball cap that turns imagined speech into prompts](https://postcutoff.com/e/2026-10-09-sabi-50m-seed-brain-ai-baseball-cap/)

## People in this post

- [Kevin Weil](https://postcutoff.com/person/kevin-weil/), Former CPO and head of OpenAI for Science (left April 2026)
- [Vinod Khosla](https://postcutoff.com/person/vinod-khosla/), Founder, Khosla Ventures