Forbes India 30 Under 30 2025: How Siddhant Dangi and Deepansh Goyal are shaping the future of brain-computer interface

Siddhant Dangi (left) and Deepansh Goyal Image: Selvaprakash Lakshmanan For Forbes India; Directed By: Kapil Kashyap; Background Image: Shutterstock

For Siddhant Dangi and Deepansh Goyal, it all started from college. 

 The two were hostel neighbours at BITS Pilani, with a common love for science and building things ground up. It began with drones, those that could go up to 47 kilometres per hour before a chance conversation with a surgeon, who specialises in amputee prosthetics at the Army Hospital (Research And Referral) in New Delhi, introduced them to the world of neuroscience and brain signals, and changed their lives forever. 

 “One of our most memorable projects was a thought-controlled bionic arm,” says Dangi. “I wondered, what if these arms could respond to the brain’s natural thoughts?” That eventually led the duo to delve into the world of neuroscience to understand brain signals and how to make technology capture them reliably. Back then, they felt that the existing solutions were unreliable or prohibitively expensive. “So, we took on the challenge of developing affordable hardware that offered near-medical-grade accuracy,” says Dangi, who co-founded Nexstem with Goyal in 2020.

In 2021, Nexstem launched Nexstem V1, an EEG (electroencephalogram) headset that would capture electrical signals. The success of the device led to a focus on capturing bio signal acquisitions, which have the potential to be used across areas such as medical, gaming, digital health and defence, among others.

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