uk-founder
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Hannah Chelkowski
Hannah Chelkowski is Co-Founder and General Partner at Blank Ventures, a $65M specialist fund investing at the intersection of fintech and commerce. A native Londoner now based in San Francisco, she brings an unusual backstory to venture - energy risk modeling at Total S.A. led to startup investing at Initialized Capital and Inovia Capital before she launched her own firm in 2022. Named to Business Insider's 71 Rising-Star VCs in 2022, she runs a deliberately concentrated portfolio with an LP base architected as a go-to-market asset: C-suite executives from major financial institutions, billion-dollar startups, and global family offices who become direct distribution channels for her portfolio companies.
Paul Johnson
Paul Johnson is a British-American entrepreneur, author, CEO coach, and General Partner at Flex Capital — a $200M+ venture fund backing 200+ category-defining companies including Perplexity, Vercel, Rippling, and Supabase. He founded Lemonaid Health in San Francisco in 2013, pioneering nationwide digital telehealth and prescription delivery, raised $60M+, scaled to nearly 200 employees, and sold the company to 23andMe for $400 million in 2021. Since then, he has written two Nobel laureate biographies, coaches high-growth CEOs, and invests in early-stage AI and fintech startups — while competing in professional-level pickleball tournaments.
Alastair Paterson
Alastair Paterson is the co-founder and CEO of Harmonic Security, a San Francisco-based startup building language models that protect enterprise data as employees pour it into generative AI tools. He previously co-founded Digital Shadows in a London kitchen in 2011 and ran it for eleven years through to its $160M acquisition by ReliaQuest in 2022. A Bristol-trained engineer who cut his teeth at BAE Systems Detica, he is now back on his second cybersecurity company, this one wagering that coaching beats blocking.