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Yoav Vilner advises and invests in AI and cybersecurity startups after cofounding Walnut and serving as its CEO. He writes about category creation and product positioning, arguing that a founder’s convictions should shape the product and company as well as its messaging. He's also an a16z Scout, a Webby's executive judge, and portfolio includes Upwind Security, Way Security, New Core, Modus, and exited companies such as Talon and Clarity.
Yoav Vilner advises and invests in AI and cybersecurity startups after cofounding Walnut and serving as its CEO. He writes about category creation and product positioning, arguing that a founder’s convictions should shape the product and company as well as its messaging. He's also an a16z Scout, a Webby's executive judge, and portfolio includes Upwind Security, Way Security, New Core, Modus, and exited companies such as Talon and Clarity.
Career
Scout at Andreessen Horowitz (a16z) from 2026-01 to PresentWSFounding Member and Advisory Board Member at Way Security from 2026 to PresentJoined Way Security's advisory board as a founding member, supporting the company's growth following its emergence from stealth.
Founder & Board Member at Walnut from 2020 to PresentCo-founded Walnut and led the company as CEO as it developed the interactive-demo software category, raised $56 million, and served customers including Adobe, HP, Dell, IBM, and NetApp.USAdvisor at Upwind Security until PresentAdvises Upwind Security as part of his work with cybersecurity startups.
Advisor at Talon until PresentAdvisory involvement with Talon, a cybersecurity company later acquired by Palo Alto Networks.
Investor at NewCore until PresentInvests in NewCore as part of his portfolio of technology startups.
Angel Investor and Advisory Board Member at Modus until PresentServes as an angel investor and advisory board member at modus.CAFounding Advisor at Clarity AI until PresentSupported Clarity AI from its early stage; the company was later acquired by Deel.
RCEO & Founder at Ranky from 2012 to 2018Founded and led Ranky, a marketing firm for technology companies serving hundreds of startup clients.
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