We believe growth is both art and science. That brands should inspire as much as they convert. And that AI, when designed well, makes people and businesses better.

We Build What’s Next

Headshot of a man with a beard, wearing a white dress shirt, standing in front of a gray brick wall.

Meet Ben De Castro - Growth Architect. Brand Builder. AI Enabler

Ben is a Silicon Valley marketing executive with a track record of building and scaling brands into billion-dollar businesses. Over two and half decades, he has led marketing at Gardyn, Mixbook, Eargo, Kobo, ING Direct, and Finastra-helping companies launch, reposition, and reinvent across consumer and B2B.

Ben is Known for blending brand creativity with growth discipline and AI innovation. He has:

  • Built acquisition engines that lowered CAC and scaled revenue.

  • Reimagined brand platforms that turned products into household names.

  • Designed go-to-market strategies that broke through crowded markets.

  • Introduced AI-enabled workflows that made teams faster, smarter, and more creative.

Best of all, Ben doesn’t hand over a playbook and walk away. He embeds, listens, and co-creates with leadership teams to unlock clarity, accelerate momentum, and deliver measurable results.

Today, as founder of D3 Ventures, Ben partners with ambitious companies-from startups to 100+ year-old institutions-to deliver what he calls the new growth equation: brands people love, growth that lasts, and AI that works.