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

Your KnowBe4 Compliance Plus Fresh Content Updates from January 2025

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

Your KnowBe4 Fresh Content Updates from January 2025

Check out the 25 new pieces of training content added in January, alongside the always fresh content update highlights, new features and events.

Beware: Mobile Phishing Mimicking the USPS Is On the Rise

Researchers at Zimperium warn that a large phishing campaign is impersonating the US Postal Service (USPS) to target mobile devices with malicious PDF files.

Microsoft is Still the Most Commonly Impersonated Brand in Phishing Attacks

Microsoft, Apple, and Google were the most commonly impersonated brands in phishing attacks last quarter, according to researchers at Check Point.

[Eye Opener] Is DeepSeek The Next Threat in Social Engineering?

AI is advancing at lightning speed, but it’s also raising some big questions, especially when it comes to security. The latest AI making headlines is DeepSeek, a Chinese startup that’s ...

Beware of Toll Scam Texts: How Cybercriminals are Targeting U.S. Drivers

Drivers across the U.S. are being bombarded with fraudulent text messages claiming to come from toll operators like E-ZPass.

Nearly Three-Quarters of UK Education Orgs Have Sustained Cyberattacks

73% of educational institutions in the UK have sustained at least one cyberattack or breach in the past five years, according to researchers at ESET.

Phishing is the Top Security Threat For Smartphone Users

Phishing attacks are the most common security issue for smartphone users, according to a new study by Omdia.

84% of Healthcare Organizations Sustained Cyberattacks Last Year

A new survey by cybersecurity vendor Netwrix found that 84% of healthcare organizations spotted a cyberattack in the past twelve months, with phishing attacks accounting for 63% of these ...