Yisi Gross

Yisi Gross (Yisrael Gross) is an Israeli-rooted, New York-based technology entrepreneur and investor. He co-founded L7 Defense (now ammune.ai), an AI-driven API security company that raised Series A backing from TRUMPF Venture and Quick Heal, and today works as a Managing Partner at TYH Investments, backing early-stage high-tech startups. He built his reputation on the unglamorous frontier of API-borne attacks, arguing that autonomous, machine-learning defense - not human-tuned rules - is the only way to keep pace with modern cyberattacks.