Stu Sjouwerman

Member Since 2021

Stu Sjouwerman

Founder, CEO

KnowBe4, Inc.

Tampa/St. Petersburg, Florida Area

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 56,000 organization customers and more than 45 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.


  • Information Security
  • Internet Security
  • Network Security


May 10th, 2023

How AI is helping to advance CEO fraud and BEC attacks

A defense-in-depth strategy that includes a combination of technical controls, regular security training, and enforcement of policies and procedures is the only solution to counter the risk of BEC attacks.

March 27th, 2023

Everything you ever wanted to know about password managers but were afraid to ask

Let’s explore the pros and cons of using password managers.

February 15th, 2023

The four most intriguing cyberattacks of 2022

To help business leaders better understand how cybercriminals are evolving their attack methods, let’s explore the most intriguing attacks of 2022.

December 26th, 2022

Deepfakes: Get ready for phishing 2.0

With deepfakes, phishing is evolving once again and being called the most dangerous form of cybercrime.


KnowBe4, Inc.

KnowBe4 is a provider of the world’s most popular integrated new-school security awareness training and simulated phishing platform used by more than 37,000 organizations worldwide. KnowBe4 helps organizations address the human element of security by raising awareness of ransomware, CEO fraud and other social engineering tactics through a new-school approach to security awareness training. Kevin Mitnick, internationally recognized computer-security expert and KnowBe4’s Chief Hacking Officer, helped design KnowBe4’s training based on his well-documented social engineering tactics. Thousands of organizations leverage KnowBe4 to train their workforce to make smarter security decisions and create a human firewall as an effective last line of defense. KnowBe4 is headquartered in Tampa Bay, Florida and has offices in the UK, Holland, Germany, Dubai, Singapore, South Africa and Brazil.


  • Cyber Security
  • Information Technology
  • Corporate Training