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

Targeted Smishing Attacks by Threat Group “The Com” On The Rise

Cyber activity by the group "The Com," which leverages (SIM) swapping, cryptocurrency theft, swatting, and corporate intrusions, is increasing.

Phishing Campaigns Spoof the U.S. Postal Service

Researchers at Akamai have found that phishing sites impersonating the U.S. Postal Service get as much traffic as the real USPS website.

Your KnowBe4 Compliance Plus Fresh Content Updates from April 2024

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

How an Athletic Director Exploited AI to Frame a Principal with Fabricated Racist Comments

In an unsettling turn of events, a high school athletic director in Maryland is accused of using artificial intelligence (AI) in a morally horrible manner.

US Justice Department Accuses Iranian Nationals of Launching Spear Phishing Attacks

The US Department of Justice has indicted four Iranian nationals for allegedly launching spear phishing attacks against the US government and defense contractors. In one instance, the ...

Your KnowBe4 Fresh Content Updates from April 2024

Check out the 33 new pieces of training content added in April, alongside the always fresh content update highlights, events and new features.

New Report Finds That 27% of Small Businesses Would Be Put Out of Business By A Cyber Attack

According to the U.S. Chamber of Commerce, the pressure is mounting on small and medium businesses (SMBs), as they must get their cyber preparedness correct or the next cyber attacks ...

AI-Assisted Phishing Attacks Are on the Rise

Threat actors are increasingly using generative AI tools to improve their phishing campaigns, according to a new report from Zscaler.

Phishing Campaign Exploits Nespresso Domain

Attackers are launching phishing campaigns using an open-redirect vulnerability affecting a website belonging to coffee machine company Nespresso, according to researchers at Perception ...

Global Optics Provider Hit with Ransomware Attack and a $10M Ransom

Global optics manufacturer Hoya had business operations at its headquarters and several business divisions impacted and is now facing a “No Negotiation / No Discount Policy” $10 million ...