browser-security
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Dori Harpaz Put the Browser at the Center of the Security Story
His career moved from soap and social trading to the hidden risks inside a browser tab. At LayerX, Dori Harpaz helped turn a technical security argument into a business story that traveled all the way to Akamai.
John Rueca Makes Strategy Survive Contact With the Calendar
At Menlo Security, John Rueca works in the narrow, consequential space between an executive decision and the hundreds of details required to make it real.
Brian Silverstein
Brian Silverstein is the founder and CEO of MirrorTab, a San Francisco cybersecurity company that treats the browser as the new battleground and tries to take it off the table entirely. Using server-side isolation, MirrorTab strips the client-side attack surface so malware, malicious extensions, and bots never touch the real code, data, or APIs behind a web session. Before MirrorTab he was an early co-founder and CTO of Honey, the shopping-rewards browser extension acquired by PayPal, and an engineer at Apple, Nest, Broadcom, and Freescale. A Cornell-trained electrical engineer with eight patents, he raised an $8.5M seed in 2025 led by Valley Capital Partners with GV and others.
Bill Robbins
Bill Robbins is the Chief Executive Officer of Menlo Security, a Mountain View-based cybersecurity company specializing in browser-based security and AI-driven threat prevention. With over 30 years of enterprise technology sales and leadership experience across Symantec, Nuance Communications, FireEye, Mandiant, and Sophos, Robbins joined Menlo as President in November 2024 and was elevated to CEO in February 2026 after helping the company surpass $140M in ARR. He now leads Menlo's push into AI agent security and agentic AI runtime protection, targeting the next wave of enterprise threats.
Dmitry Dontov
Dmitry Dontov is the CEO and co-founder of Spin.AI, a Palo Alto-based SaaS security platform that protects mission-critical cloud data across Google Workspace, Microsoft 365, Salesforce, and Slack. With over 20 years in cybersecurity, two patents to his name, and $21.5M raised including a K1 Investment Management round in March 2026, Dontov has built a platform serving 1,500+ organizations across 100+ countries. A Forbes Business Council member, Young Entrepreneur Council contributor, and columnist for Dark Reading, he's positioned Spin.AI as a Forrester Wave Strong Performer in SaaS Security Posture Management.