Colin Gardiner, Angel Investor

Colin Gardiner is an angel investor with a focus on marketplaces and startup innovation. His portfolio includes howie, a seed-stage company that raised $6M in 2025 to build AI-driven marketplace solutions. He invests in companies that strengthen marketplace dynamics and provide tools for startup operators. Colin is the Author of Take Rate by Colin Gardiner, a startup and marketplace newsletter and podcast, and Co-Founder of Longtail, a company focused on marketplace innovation. These roles highlight his commitment to supporting operators and building next-generation marketplace platforms, though they are not direct investments.