The $10M+ Bet on a Beanie That Reads Your Brain | Sabi & the Future of BCI | E2282

April 29, 2026

AI Summary

5 min read

The Beanie That Reads Your Brain: Inside Sabi's Non-Invasive BCI

Jason Calacanis opened the episode by announcing that community ownership is becoming a priority for his media operation. His principle: "If nobody owns it, it's never going to excel." He described deputizing team members as CEOs of their domains—editorial, sales, back office, accelerator—and argued that any project that isn't number one on someone's list will never break out. He also urged founders to activate the top 1% of their audience rather than fixating on total follower count, calling that "the streamer trick" for building a deeply engaged core.

The Bet: A Beanie That Decodes Thought

The main segment featured Rahul Chhabra and Atmadeep Banerji, CEO and CTO of Sabi, a company building a non-invasive brain-computer interface (BCI) that fits inside a beanie. Calacanis was openly skeptical: "There's no way to put a beanie on and then have it do transcription. Come on." The founders explained that their technology evolved from fMRI-based decoding—where a 2023 paper co-authored by Banerji showed that deep learning models could decode what a person was looking at from blood flow signals—to biopotential sensors that measure electrical activity from outside the skull. They described the challenge as analogous to satellites reading signals through Earth's atmosphere: "What we're trying to do is building a GP

Continue reading the full summary in the app — free to try.

Read Full Summary →

Free • No credit card required

Listen to Audio Summary Open in App

Never miss an episode of This Week in Startups

Get every new episode summarized in your inbox — free, ~5 minutes to read.

No spam. Unsubscribe anytime.

What you'll learn

1 (11:00) **Sabi BCI Demo & Skepticism** - Rahul and Atmadeep introduce their non-invasive BCI beanie that claims to translate thoughts to text
2 (16:00) **Founder Backgrounds & Credibility Check** - Jason does live diligence on the founding team's credentials
3 (22:00) **Privacy & Safety Concerns** - Jason flags the obvious issues with a hat that reads your mind
4 (26:45) **AI Sidebar Bounty Contest** - Oliver joins to review submissions for a $5K bounty on live AI personas for the show
5 (44:29) **Refined Bounty Spec & Timeline** - Jason sets clear rules for the final competition
6 (48:51) **New $5K Bounty: Annotated.com** - Jason announces a second bounty for an annotation tool
7 Standout Quotes

+ Full timestamped outline available in the app

Show Notes

This Week In Startups is made possible by:

Render - https://Render.com/TWIST

Northwest Registered Agent - https://NorthwestRegisteredAgent.com/TWIST

LinkedIn Jobs - https://LinkedIn.com/TWIST

Today’s show:

A beanie that reads your thoughts and turns them into text — no surgery required? Jason grills the Sabi co-founders on their noninvasive brain-computer interface, backed by Vinod Khosla, and calls a cap on the whole thing (until he doesn't).

This episode of This Week in Startups covers a lot of ground: Jason's tactical tip of the day on making everyone the CEO of their domain, a deep dive into Sabi's thought-to-text beanie, a live demo of AI-powered podcast sidebars built by the TWiST audience, the announcement of a new $5K bounty for an annotation tool, and Jason's big five wellness framework.

Guests:

Sabi: Website, Wired article

Co-founder and CEO Rahul Chhabra: LinkedIn, X

Companies and people discussed:

Matt Coffin, founder of LowerMyBills.com

Vinod Khosla, founder of Khosla Ventures

Neuralink, a leading BCI company

ElevenLabs, a leading voice AI startup

Calm, the popular meditation app

Timestamps:

0:00 Intro & tactical tip: Make everyone the CEO of their domain

1:49 Matt Coffin's "CEO of X" management philosophy

3:04 Community ownership: Deputizing Ricky, Lawn, Bianca, Maddie, Kabir

4:02 Building the Noti Gang: X group chats and community flywheels

5:08 Founder takeaways: Activate your top 1%, make someone the CEO of it

6:18 The streamer trick, parasocial dynamics, and creator ethics

7:59 Plaud: If your work depends on conversations — interviews, meetings, calls — you need a Plaud NotePin. You can check it out at https://Plaud.ai/twist and use code TWIST for 10% off!

9:34 Guest intro: Rahul Chhabra of Sabi

10:01 What is Sabi? Noninvasive BCI in a beanie with 100,000 sensors

10:13 LinkedIn Jobs - Hire right, the first time. Post your first job and get $100 off towards your job post at https://LinkedIn.com/TWIST

11:02 How it works: From fMRI to EEG, from hospital to hat

13:46 The brain foundation model and thought-to-text decoding

15:55 Vetting the founders: BITS Pi