SAN FRANCISCO, Calif., Oct. 09, 2026 — Sabi announced it has raised a $50 million seed round led by Khosla Ventures to develop a brain-AI interface designed for everyday wear. Accel, Initialized Capital, former OpenAI Chief Product Officer Kevin Weil, DST Global, Collaborative Fund and Ascend also participated in the round.
Sabi’s first product resembles an ordinary baseball cap. Sensors hidden inside the cap read neural signals through hair without gel, surgery or direct contact with the scalp. The company is developing the cap to translate imagined speech and intent into commands for AI, aiming to let people communicate with AI faster and privately without typing or speaking.
The approach targets a different use case than most brain–computer interfaces, which have largely been designed for clinical settings and cursor control. Sabi positions its cap as a non-invasive alternative to implantable interfaces, which can capture more detailed neural activity but require surgery and thus are impractical for everyday use.
brain-AI interface design and technology
Each cap contains sensors measuring between one and five millimeters, built around Sabi’s custom EEG chip. The sensors are designed to capture signals through hair across a gap of up to five millimeters. In internal benchmarks, Sabi’s chip was more than 50 times as power-efficient as the Texas Instruments ADS1299, a widely used EEG analog front end; that efficiency lets the electronics fit inside ordinary headwear while limiting heat and electrical noise.
The neural signals are processed by Sabi’s Brain Foundation Model, which has been trained on more than 100,000 hours of labeled, non-invasive recordings collected while participants imagined words and performed specific mental tasks. Sabi says this is the largest disclosed dataset of its kind.
An early prototype of the cap will debut at CES 2027. Sabi is developing three primary forms of interaction for the device.
