Sabi, a San Francisco-based startup developing non-invasive brain-computer interfaces, has raised $50 million in a seed funding round led by Khosla Ventures. The round also included participation from Accel, Initialized Capital, DST Global, Collaborative Fund, Ascend and Kevin Weil, former Chief Product Officer at OpenAI.
Co-founded by CEO Rahul Chhabra and CTO Atmadeep Banerjee, Sabi is developing wearable technology designed to let users communicate with artificial intelligence systems through neural signals, without requiring surgery or implanted devices.
The company’s first product integrates electroencephalography (EEG) sensors into a baseball cap. These sensors are designed to detect brain activity through hair without direct contact with the scalp. The signals are processed using Sabi’s custom EEG chip and an AI system called the Brain Foundation Model.
According to the company, the model has been trained on more than 100,000 hours of labeled neural recordings. Sabi is developing capabilities that could allow users to convert imagined speech into text, issue commands to AI assistants through trained mental signals and predict intended interactions with digital devices.
Sabi publicly introduced its wearable brain-computer interface concept in April 2026. Its technology remains under development, with the company planning to demonstrate early versions of its proposed interactions at CES 2027 in Las Vegas.
The new funding will support expansion of Sabi’s neural dataset, completion of its custom chip, manufacturing of early devices and recruitment across neuroscience, hardware engineering and machine learning. The company is also preparing devices for participants on its early-access waitlist.
