Founder · FourthSpace · London

An intelligence layer for the physical world.

I'm Sebastian Boncu, founder of FourthSpace. Data and AI for how people move through and use space.

Sebastian Boncu

Work

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FourthSpace

Founder

An urban intelligence company. We use data and AI to understand how people move through and use the spaces around them, and turn that into something cities and operators can act on.

DataAICities
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RISE Hub

Co-founder

Bringing SEIS/EIS-style startup tax incentives to Romania.

Stories

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Making cities legibleMay 2026Building quietlyApr 2026Data, AI, and the streetMar 2026

About. Founder based in London, building at the intersection of data, AI, and the city. I work quietly and let the work make the argument.

More about me

I also angel-invest in early-stage founders. See portfolio.