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

[New Benchmarking Feature] Compare Your Organization’s Security Culture with Other Organizations in Your Industry

We are excited to announce that the KnowBe4 Industry Benchmarking feature has been expanded to now include industry benchmark comparison data for KnowBe4’s Security Culture Survey (SCS).

A Generational Divide Among Social Engineering Victims

Younger and older people differ in their susceptibility to different types of social engineering attacks, according to researchers at Avast. Younger people tend to fall for scams ...

FBI: US Defense Industry Organizations Targeted with USB-Based Ransomware Attacks

Using mailed out “BadUSB” drives as the initial attack vector, cybercriminals are attempting to infiltrate sensitive networks and infect them with BlackMatter or REvil ransomware strains.

New U.K. Vishing Scam Offers Significant Phone Plan Discounts in Exchange for your Phone Provider's One-Time Security Code

Scammers targeting customers of mobile carrier O2 are enticing victim engagement by offering discounts on their mobile plan as much as 40%.

DHL is Now the Most Spoofed Brand in Phishing

International shipping company DHL was the most impersonated brand in phishing attacks during the fourth quarter of 2022, researchers at Check Point have found.

Ransomware Attacks are Growing in Number, But Not in Sophistication

As organizations work to protect against the relentless series of ransomware attacks that have plagued businesses large and small, the methods of attack seem to be leveling out.

Google Docs Comment Feature is the Key to a New Wave of Phishing Campaigns

Hackers take advantage of legitimate comment functionality as a way to look legitimate, reach the Inbox, and avoid detection, despite using malicious links for phishing attacks.

Half of All Organizations Hit by Ransomware Experience Productivity Loss

According to new data, ransomware is expected to be a larger and more likely threat in the next year, making the impacts felt today very relevant as the impetus for improved cybersecurity.

KnowBe4's Top-Clicked Phishing Email Results for Q4 2021 Compare the U.S. and EMEA [INFOGRAPHIC]

KnowBe4's latest quarterly report on top-clicked phishing email subjects is here. We analyze the top categories, general subjects (in both the United States and Europe, Middle East and ...