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’s Q1 2019 Year-Over-Year Sales Grow 70%

I'm excited to announce our massive year-over-year Q1 2019 sales increase, growing more than 70% over Q1 2018's sales, breaking all records, and customer accounts now well over 24,000.

Inside A Massive Spam Operation, And Shutting It Down

We’ve blogged before about spammers using publicly accessible databases to help them with large-scale spam campaigns. Here’s what one such recent campaign looks like from the insider. ...

Business Email Compromise (BEC) Attacks Go Mobile Using SMS to Increase Attack Success

Compromise-by-Text turns out to be an even better medium for cybercriminals to fool users into becoming victims. A new article from security vendor Asigra demonstrates how and why.

New York Launches a Cybercrime Brigade

The WSJ in their Opinion section reported about a NY citywide initiative that aims to coordinate all digital law-enforcement efforts. The op ed was written by Cy Vance, Manhattan district ...

Scaring People with GDPR

Criminals are taking advantage of misunderstandings surrounding the European Union’s General Data Protection Regulation (GDPR) to exploit gullible employees and organizations, according ...

Free Tool: Phishing Reply Test Identifies Users Likely to Fall Victim to Fraudsters

Highly targeted phishing attacks, known as Business Email Compromise or CEO fraud scams have exceeded $12.5 billion in total known losses worldwide (according to the FBI). These social ...

vxCrypter Is the First Ransomware to Delete Duplicate Files

Our friend Larry Abrams at bleepingcomputer wrote: "The vxCrypter Ransomware could be the first ransomware infection that not only encrypts a victim's data, but also tidies up their ...

The Famous Fall Victim To Phishing, Too

A Georgia resident has taken a guilty plea to charges of hacking numerous Apple accounts belonging to high-profile athletes and musicians and stealing their credit card information, ...

AV-Test compares 19 Antivirus Tools: Windows Defender Reaches Maximum Detection Score

The German AV-Test lab compared 19 antivirus products, including the free Windows Defender which comes with the Win10 OS. Defender reached the max detection score, which was better than a ...

Cyber Security is About Culture and People, not Technology

Security isn’t just IT’s problem, but everyone’s problem within the organization. The key isn’t “yet another security solution”, but a changing of the way the organization thinks about ...