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

Email Attacks are Having A Major Impact on Business with Employees Seen as a Major Weak Link

With 82% of organizations facing an attempted email-based security threat in the past year, the impacts of these attacks are material and potentially harmful to the organization.

CEO Fraud hits B.C. lawyers for $2 million

Two B.C. law firms were targets of so-called social engineering frauds causing almost $2 million in real estate and investment funds to be wired to people other than clients the firms ...

KnowBe4 Fresh Content & Features Updates - July 2019

Check out the content and feature updates in the KnowBe4 platform for the month of July!

Confirm Your Unsubscribe Request? Not So Fast

An email phishing campaign that BleepingComputer describes as “long-running” has shown a distinct uptick recently. The phishbait in the subject line will read something like this: ...

Bad Guys Exploit CapitalOne Breach to Push Backdoor Trojan

The bad guys are now exploiting news of the CapitalOne breach to push a malicious backdoor trojan via a phishing email purporting to offer a Windows Security Update. See the attached ...

Pleading Guilty to Business Email Compromise

Amil Hassan Raage has taken a guilty plea to charges of fraud in a business email compromise (aka CEO fraud) case that netted him and his criminal co-conspirators almost three-quarters of ...

[NEW PhishER Feature] Identify Email Threats Even Faster with PhishML™

We are excited to announce the availability of PhishML™ as part of the PhishER platform to all PhishER customers. PhishML is a new machine-learning module that helps you identify and ...

New UK Study: "3 out of 4 phishing scams get to your inbox untouched"

Chris Matyszczyk wrote: "Apple sends me so many invoices every week that I scarcely know what I've gone and bought. This appears to have also crossed the minds of researchers at the UK's ...

Why School Districts are Targets of Social Engineering

School districts are becoming increasingly popular targets for ransomware, with at least five of these attacks occurring in July, according to the New York Times.

Why Is Windows Defender The World's No. 1 Antivirus With More Than Half A Billion EndPoints?

Having been inside the AntiVirus software industry for quite a while, and building an AV tool from the ground up, when I saw Redmond start acquiring several small AV companies in 2008 and ...