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Alljoined

Decoding neural signals for brain-computer interfaces

Overview

Alljoined builds and provides a complete Brain-Computer Interface (BCI) stack that decodes neural signals into meaningful representations like images, text, sound, and video using deep learning. Its products operate by collecting neural data through a BCI, processing and decoding it with in-house models, and producing user-ready outputs across multiple modalities. The company differentiates itself by offering an affordable, high-quality interface and an end-to-end stack, backed by researchers from top institutions, and by licensing the technology to device manufacturers and application developers while pursuing clinical partnerships. Its goal is to democratize neural decoding and enable interaction with devices at the speed of thought for healthcare diagnostics, creative industries, and other human–technology applications.

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About Alljoined

Simplify's Rating
Why Alljoined is rated
C+
Rated B on Competitive Edge
Rated C on Growth Potential
Rated C on Differentiation

Industries

Data & AnalyticsAI & Machine LearningHealthcare

Company Size

11-50

Company Stage

N/A

Total Funding

N/A

Headquarters

San Francisco, California

Founded

2023

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Simplify's Take

What believers are saying

  • Alljoined released NOVA and ENIGMA in 2026, showing rapid product cadence.
  • The company claims state-of-the-art image reconstruction and minute-level adaptation for new users.
  • Hiring is active in August 2026, signaling ongoing buildout despite tiny headcount.

What critics are saying

  • Alljoined has only 20 participants in Alljoined-1.6M, limiting generalization by 2027.
  • Consumer EEG needs over 20x more data than lab-grade systems for equal accuracy.
  • Open, non-invasive decoding invites fast copying from Synchron, university labs, and open-source groups.

What makes Alljoined unique

  • Alljoined builds non-invasive EEG decoding, avoiding implant risk and clinical hardware dependence.
  • Its consumer-grade Alljoined-1.6M dataset and ENIGMA model create a rare full-stack moat.
  • Backers include ARTIS, Conviction, Compound, Khosla, and individual executives like Jeff Dean.

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Benefits

Health Insurance

Vision Insurance

Dental Insurance

Unlimited Paid Time Off

Relocation Assistance

401(k) Company Match

Growth & Insights

Headcount

6 month growth

0%

1 year growth

-5%

2 year growth

-5%

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