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James Luo

General Partner

James invests in companies expanding the frontier of what's possible, from silicon and datacenter systems to the platforms and applications built on top of them. He partners with visionary founders to turn novel technical breakthroughs into category-defining businesses.

James Luo

Nothing inspires me more than founders taking on hard problems others have written off as too difficult. The founders I partner with share a common thread: the ambition to build products and companies that make possible what wasn't possible before.

My attraction to hard technical problems started when I was young. I spent much of my teenage years in a university physics lab researching superconducting materials, and later studied economics and computer science in college to understand how new technologies emerge and create value in the world. That fascination has never faded, and it's why I'm drawn to founders willing to bet years of their lives on ideas the world hasn't yet caught up to. I also believe there has never been a better time to make that bet: AI has dramatically accelerated the pace of technological progress and is demanding foundational breakthroughs at every layer of the stack, from silicon to software.

Companies built on those kinds of breakthroughs rarely have simple stories. The technology takes time to understand, the product takes patience to develop and mature, and the path to a large business is not always obvious. I aspire to be the kind of investor a founder wants alongside them on that journey: curious enough to deeply understand the technology and vision, candid enough to say what I really think even when it's uncomfortable, and committed enough to work through all the challenging scaling questions that come with turning technical breakthroughs into generational companies. Building an enduring business is rarely linear, and I believe the years between the big milestones are where an investor earns the right to be called a true partner. My commitment to founders is to show up every day, good or bad, with the same conviction I had the day we invested.

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Investments

Recent Insights

  • Dimly lit perspective inside a long pipe or tunnel with dark parallel lines and curved walls receding into the distance.

    Celero: Bringing Coherence to AI-Scale Networking

  • Macro close-up of a black textured fabric mesh with a pattern of tiny white dots and a shallow depth of field.

    nEye: Illuminating AI Datacenter Networking

  • Marshall Heilman, CEO of DTEX Systems
 wearing a black blazer and blue shirt against a blurred green background.

    DTEX: Powering Your Trusted Workforce

  • Jaakko (Jack) Kokko, Co-founder and CEO, and Raj Neervannan, Co-founder and CTO, of AlphaSense, smiling and laughing together while standing side by side against a plain white background.

    AlphaSense: The Emerging Leader in AI-Enabled Market Intelligence

  • Salt Co-founders Roey Eliyahu (CEO) and Michael Nicosia (CEO). CapitalG leads Salt Security's $140M Series D to protect the growing API ecosystem.

    Salt Security: Protecting the Growing API Ecosystem

  • Two women holding laptops with coworkers and an illuminated Expel sign in the background. Just 18 months after we led its Series D, we’re delighted to co-lead its Series E.

    Doubling Down on Expel: Still Defending Customers from Cyber Criminals

  • Orca Co-founders Gil Geron (CEO) and Avi Shua (Chief Innovation Officer) in matching black Orca Security T-shirts standing in front of a wall with a geometric orca illustration.

    Our Investment in Cloud Security: Meet Orca

  • Photo of Gene Frantz (left) and James Luo (right), general partners at CapitalG

    Why Zero Trust is the Future for Corporate Security

  • The Expel team posing in front of a window.

    Expel - Defending Enterprises from Cyber Criminals and Overused Buzzwords

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