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Stu Sjouwerman

Founder, CEOKnowBe4, Inc.

Clearwater, FL

Member Since June 2021


Information Security
Internet Security
Network Security


Stu Sjouwerman (pronounced “shower-man”) is the founder and CEO of KnowBe4, which hosts the world’s most popular integrated Security Awareness Training and Simulated Phishing platform, with over 65,000 organization customers and more than 60 million users. A serial entrepreneur and data security expert with 30 years in the IT industry, Stu was the co-founder of Inc. 500 company Sunbelt Software, a multiple award-winning anti-malware software company that was acquired 2010. Stu is the author of four books, with his latest being “Cyberheist: The Biggest Financial Threat Facing American Businesses.” From 1996 through 2001, Stu was the Editor-In-Chief of WServer News, an email newsletter to 100,000+ IT system administrators helping them to keep their systems secure. Stu also served as editor of GFI Media Services which published four major online newsletters, including WServer News, WXP News, Win7 News, and GFI Security News. Along with his CEO duties, Stu is currently Editor-in-Chief of Cyberheist News, an e-zine tailored to deliver IT security news, technical updates and social engineering alerts to IT professionals.

Published content

Why are so many public sector organizations getting attacked?


The FBI and CISA have issued repeated warnings about ransomware actors targeting the public sector. Here's how to keep your organization safe.

The growing threat of AI in social engineering: How business can mitigate risks


AI social engineering is just getting started. Employers must make employees aware of these risks and train them to exercise their security intuition. Here's how.

Businesses beware: You can be sued for online scams


Businesses are increasingly being held accountable, liable, and responsible for security-related damages.

How to prevent impersonation attacks at your organization


Training employees to recognize and report impersonations, deploying multi-factor authentication, and hunting down impersonations can mitigate risk factors.

AI: Cybersecurity threat or opportunity?


Security professionals must weigh the benefits and risks of AI as it becomes more sophisticated and widespread.

Why root causes matter in cybersecurity


Enterprises continue to double-down investments on cybersecurity. But why aren’t cyberattacks slowing down?

Company details

KnowBe4, Inc.

Company bio

KnowBe4, the provider of the world’s largest security awareness training and simulated phishing platform, is used by more than 65,000 organizations around the globe. Founded by IT and data security specialist Stu Sjouwerman, KnowBe4 helps organizations address the human element of security by raising awareness about ransomware, CEO fraud and other social engineering tactics through a new-school approach to awareness training on security. Kevin Mitnick, who was an internationally recognized cybersecurity specialist and KnowBe4’s Chief Hacking Officer, helped design the KnowBe4 training based on his well-documented social engineering tactics. Tens of thousands of organizations rely on KnowBe4 to mobilize their end users as their last line of defense and trust the KnowBe4 platform to strengthen their security culture and reduce human risk.



Area of focus

Cyber Security
Information Technology
Corporate Training

Company size

501 - 1,000