Shuman Ghosemajumder

Shuman Ghosemajumder is CEO of Reken, an artificial intelligence and cybersecurity startup in Silicon Valley, which he co-founded in 2024. Backed by leading venture capital firms, Reken is building a next-generation platform that uses AI to defend against AI-powered threats.

As an early Google employee, Shuman helped build and launch Gmail. As Global Head of Product for Trust & Safety, he founded Google's Trust & Safety product group, leading the development of AI, security, and privacy products that safeguarded more than one billion users. He was later CTO of Shape Security, which developed an AI platform that protected the largest banks, airlines, and federal agencies against sophisticated bots. He helped build Shape from a pre-product startup to its $1 billion acquisition by F5, where he was named Global Head of AI.

Shuman is also co-founder and chairman of TeachAids, an educational technology NGO spun out of Stanford University. Supported by Microsoft, Google, UNICEF, and governments around the world, TeachAids develops free research-based health education software and VR products used in 82 countries.

Born in Germany and raised in London, Ontario, Shuman holds degrees from Western University and MIT. He was recognized by The Boston Globe on its MIT150 list of the top MIT innovators of all time.

Updated February, 2025