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

Netflix Scams Target People Sheltering in Place

With people sheltering in place during the pandemic emergency, they’re both teleworking and finding their entertainment online. Google searches for Netflix jumped 142% since the advice to ...

It’s Look-Alike Day: While Doppelganger Humans Can Be Funny, Domains Are Not

On April 20, we celebrate National Look-Alike Day. It’s the perfect time to see which people have similar features as you, instead of that completely normal person you bumped into at the ...

Damage From Phishing Doubles For Dutch Banks

Dutch banks saw damage from phishing double last year compared to the previous year. This concerns both phishing for 2FA security codes and phishing for credit and debit card numbers, ...

[Heads-Up] Hacking Attacks Double Against Users Who Now Suddenly Work From Home

Reuters just reported that hacking activity against corporations in the United States and other countries more than doubled by some measures last month as digital thieves took advantage ...

[NEW PhishER Feature] Remove, Inoculate, and Protect Against Email Threats Faster with PhishRIP

We are excited to announce the availability of PhishRIP™ as part of the PhishER platform to all PhishER customers. PhishRIP is a new email quarantine feature that integrates with ...

Phishing Trend: Quality, Not Quantity?

A new report from CyberCube found that sophisticated cybercriminals are increasingly shifting to launching business email compromise (BEC) attacks against executives, Insurance Business ...

Spanish Hospital Faces Netwalker Ransomware Attack in the Midst of Pandemic

At a time when hospitals are already stretched thin for budget, one of many attackers still thinks it’s a good idea to hold hospitals for ransom, showing organizations always need to be ...

Coronavirus-Related Spear Phishing Attacks See a Massive 667% Increases in March

Attackers are taking advantage of the pandemic, looking for every way possible to achieve their malicious goals via targeted phishing campaigns of every kind.

When the Implausible Seems, Well, More Plausible

Everyone is vulnerable to social engineering and no security tool can block every phishing email, according to Kevin Casey at The Enterprisers Project. Casey talked to a number of ...

Phishing *Better* Than the Bad Guys During the Pandemic

By Katie Brennan, KnowBe4 Product Content Director. The COVID-19 pandemic has had cyber criminals in a phishing frenzy for months. They’ve been sending countless attacks, with the ...