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

U.S. Justice Department Charges China’s Hackers-for-Hire Working IT Contractor i-Soon

The U.S. Justice Department has charged ten Chinese nationals for acting as hackers-for-hire for the Chinese government.

Your KnowBe4 Compliance Plus Fresh Content Updates from February 2025

Check out the February updates in Compliance Plus so you can stay on top of featured compliance training content.

Your KnowBe4 Fresh Content Updates from February 2025

Check out the 58 new pieces of training content added in February, alongside the always fresh content update highlights, new features and events.

Warning: Ransomware Threats Increased Fourfold in 2024

Researchers at Barracuda observed a fourfold increase in ransomware threats last year, driven by increasingly sophisticated ransomware-as-a-service (RaaS) operations.

Data at Risk: 96% of Ransomware Attacks Involve Data Theft

A new report from Arctic Wolf has found that 96% of ransomware attacks now involve data theft as criminals seek to force victims to pay up.

[Heads Up] Sophisticated Phishing Attack Uses New JavaScript Obfuscation Trick

Researchers at Juniper Threat Labs warn that phishing attacks are utilizing a new obfuscation technique to hide malicious JavaScript.

Protect Yourself from Job Termination Scams

ESET warns of a wave of phishing attacks informing employees that they’ve been fired or let go. The emails are designed to make the user panic and act quickly to see if they’ve actually ...

Protect Your Devices: Mobile Phishing Attacks Bypass Desktop Security Measures

Zimperium warns of a surge in phishing attacks specifically tailored for mobile devices. These attacks are designed to evade desktop security measures in order to breach organizations ...