KnowBe4 Blog

Keeping you informed. Keeping you aware.
Stay on top of the latest in human and agent security including social and prompt engineering, ransomware and phishing attacks.

Stu Sjouwerman

Founder and Executive Chairman

Stu Sjouwerman (pronounced “shower-man”) is the Founder and Executive Chairman of KnowBe4, Inc., which hosts the world’s most popular integrated security awareness training and simulated phishing platform, with over 54,000 organization customers and more than 50 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 in 2010.


Recent Posts

KnowBe4 Published in The Top 10 Nicest Offices in Tampa!

Just published, KnowBe4 in Full Stack Talent's Article on The Top 10 Nicest Offices In Tampa! (They came a few weeks ago to take pictures of our office space.)

Cybercriminals Use 1.7 Million Compromised PCs in Botnet Advertising Fraud Scam

The Russian-born, botnet-driven advertising fraud scam, 3ve, generated over $29 million in revenue using fileless malware variant Kovter, botnets, and unsuspecting users.

Ransomware Remains the Largest Source of Cyber Claims and Downtime

Details shared from Canadian insurer CFC Underwriting highlight the realities of ransomware attacks, and just how negatively impactful the aftermath is on business.

ModStore Release Announcement: "Using the Phish Alert Button"- 3-minute Short Version

Now live in the ModStore is a new Phish Alert video module: Using the Phish Alert Button - Basic Use This is the PAB (super short version) that we created based on requests from admins ...

[ALERT] Now The Bad Guys Are Phishing For Your Retirement Money

Eric Howes, KnowBe4 Principal Lab Researcher observed: "Here is a screenshot of a phishing email that came in Friday. In it the bad guys attempt to apply the same modus operandi currently ...

The FBI Catches CEO Fraud Scammers by Giving Them a Taste of Their Own Medicine

The case of how the FBI turned the tables on cybercriminals using the very same tactics demonstrates how powerful the art of social engineering and deception can get a victim to act.

True Phishing Confessions From A Compromised Company. This One Has A Twist At The End

"The email you hope you never have to send to clients/customers" OK, so here is another horror story that you hope you can prevent from happening to your own organization. This is an ...

When Does a Legitimate Password Reset Email Feel Like a Phishing Attack? Just Ask Citrix Users

A recent password reset email from ShareFile (a Citrix company) put some users on edge, questioning both the emails legitimacy and why the reset.

CEO Fraud Attacks are Citing the California Wildfires

Criminals are using the California wildfires as a social engineering tactic to manipulate people into buying gift cards supposedly intended for victims of the disaster, according to James ...