David Gelberg

David Gelberg is the world’s fastest-exited founder: he built and sold a company in around 20 hours. He runs Unicorn Mafia, London’s largest developer community.

A software engineer by background, he is a venture scout for Andreessen Horowitz and a founding partner in 20VC’s 20Sales Fund II, and has helped startups raise at multiple stages from tier-one VC funds. Based in London, he has close networks across the UK, US and Israel. Most recently, he joined the UK Prime Minister’s office at 10 Downing Street, where he runs AI operations across government.