Key Takeaways
- • Palo Alto-based Sabi announced it raised a $50 million seed round led by Khosla Ventures to develop a non-invasive brain-AI interface built into an ordinary-looking baseball cap, per a GlobeNewswire release dated October 9, 2026.
- • Accel, Initialized Capital, former OpenAI Chief Product Officer Kevin Weil, DST Global, Collaborative Fund and Ascend also participated in the round.
- • The cap uses sensors measuring one to five millimeters, reading neural signals through hair without gel, surgery or scalp contact, powered by a custom EEG chip.
- • Sabi says its Brain Foundation Model was trained on more than 100,000 hours of labeled non-invasive recordings, which it believes is the largest disclosed dataset of its kind.
- • An early prototype is scheduled to debut at CES 2027.
Summary
Sabi announced on October 9, 2026 that it has raised a $50 million seed round led by Khosla Ventures to develop a brain-AI interface designed for everyday wear, according to a GlobeNewswire release. Accel, Initialized Capital, former OpenAI Chief Product Officer Kevin Weil, DST Global, Collaborative Fund and Ascend also participated. The company is headquartered in Palo Alto, California.
Sabi's first product is a baseball cap containing sensors that read neural signals through hair without gel, surgery or direct scalp contact. The company describes the device as a non-invasive alternative to implantable brain-computer interfaces, which can capture detailed neural activity but require surgery. Brain-computer interfaces have largely been developed for clinical settings and cursor control; Sabi is pursuing consumer communication with AI systems instead.
The hardware centers on a custom EEG chip. Each cap contains sensors measuring between one and five millimeters designed to capture signals across a gap of up to five millimeters. In internal benchmarks, Sabi says the chip is more than 50 times as power-efficient as the Texas Instruments ADS1299, a widely used EEG analog front end, a difference the company credits with allowing the electronics to fit inside ordinary headwear while limiting heat and electrical noise.
Neural signals are processed by Sabi's Brain Foundation Model, trained on more than 100,000 hours of labeled non-invasive recordings collected while participants imagined words or performed mental tasks. Sabi plans three primary interaction modes: imagined speech to text, thought-to-prompt commands for AI assistants, and intent prediction that anticipates likely keystrokes or on-screen actions for the user to confirm. An early prototype is set to debut at CES 2027.
Sabi's first product is a baseball cap containing sensors that read neural signals through hair without gel, surgery or direct scalp contact. The company describes the device as a non-invasive alternative to implantable brain-computer interfaces, which can capture detailed neural activity but require surgery. Brain-computer interfaces have largely been developed for clinical settings and cursor control; Sabi is pursuing consumer communication with AI systems instead.
The hardware centers on a custom EEG chip. Each cap contains sensors measuring between one and five millimeters designed to capture signals across a gap of up to five millimeters. In internal benchmarks, Sabi says the chip is more than 50 times as power-efficient as the Texas Instruments ADS1299, a widely used EEG analog front end, a difference the company credits with allowing the electronics to fit inside ordinary headwear while limiting heat and electrical noise.
Neural signals are processed by Sabi's Brain Foundation Model, trained on more than 100,000 hours of labeled non-invasive recordings collected while participants imagined words or performed mental tasks. Sabi plans three primary interaction modes: imagined speech to text, thought-to-prompt commands for AI assistants, and intent prediction that anticipates likely keystrokes or on-screen actions for the user to confirm. An early prototype is set to debut at CES 2027.
Go deeper than the headline
Research every firm in this story, track the ones that matter and get the daily briefing — free for 7 days.