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

Many US States Requiring Training on COVID-19 Before Return to Work

Many states across the US are now mandating that organizations provide training to your employees before they can return to work. Definitely check your local state guidelines but KnowBe4 ...

Legitimate Accounts for Illegitimate Business Email Compromise

Cybercriminals frequently use email accounts from legitimate services like Gmail to carry out business email compromise (BEC) attacks, Help Net Security reports. Researchers at Barracuda ...

KnowBe4 Celebrates 10 Years by Planting 10,000 Trees Worldwide

We're celebrating 10 years as a company today! To celebrate this milestone, we'll be planting 10,000 trees around the world to celebrate our 10th anniversary and the addition of its ...

Cyberattacks Involving Both Data Exfiltration and Ransomware to Ensure Ransom Payment Increase 152%

Ransomware authors are realizing the benefit of either stealing data or just implying they have and threatening to publish the data publicly in order to increase their chances of being ...

Dark Patterns and the Craft of Online Persuasion

People should learn how to spot the tactics companies (and, more importantly, criminals) use to persuade customers (or marks), especially when those tactics are used deceitfully, ...

Nearly Half of Dutch Listed Companies Do Not Provide Information on Cybersecurity in Annual Report

Many publicly traded companies in the Dutch AEX, AMX and AScX indices fail to be transparent on cybersecurity efforts in their annual reports. While the Netherlands is a highly digitized ...

The U.N. counterterrorism chief says a 350% increase in phishing websites was reported in Q1 2020

UNITED NATIONS -- A 350% increase in phishing websites was reported in the first quarter of the year, many targeting hospitals and health care systems and hindering their work responding ...

Ransomware Payments Increase by a Massive 60% as Email Phishing Rises in Frequency as Primary Attack Vector

The newest ransomware data paints a pretty bleak picture for organizations with “big game” attacks and six- and seven-figure ransom demands becoming the norm.

Leaked U.S.-UK Trade Documents Show How Devastating Compromised Email Can Be

An ongoing criminal investigation highlights how classified documents stolen by Russian hackers from former U.K. trade minister Liam Fox may have been used to impact the British 2019 ...

Five Reasons Why Ransomware Attacks Should Be Your Biggest Worry and Aren’t Going Anywhere

No other cyberattack has evolved like ransomware. Today’s attacks are more pervasive, invasive, impactful, damaging, and costly. Learn why and what to do about it.