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OC500 2025: STUART MCCLURE  

STUART MCCLURE  

CEO 

WETHOS AI
QWIET AI 

 

WHY: Co-founded internet security company Cylance Inc., which he sold to Canada-based BlackBerry Ltd. (NYSE: BB) for $1.5B in 2019. Since then, CEO of San Jose-based cybersecurity firm Qwiet AI and CEO of workplace dynamics company Wethos AI in Newport Beach.  

IN THE NEWS: San Francisco-based Harness acquired Qwiet AI in September. Last year, Wethos AI raised $7.5M in a seed funding round led by Jeff Herbst at GFT Ventures.  

QUOTABLE: “At Qwiet AI, we’ve always believed that developers deserve security that matches their speed. Our technology was built for the future of AI-driven development, and Harness provides the platform and scale to bring that vision to life. Together, we can help enterprises turn security into a true driver of innovation.” 

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