Grit The AI Era of Cybercrime: How Malwarebytes Is Evolving Its Security Stack | Marcin Kleczynski
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Feb 23, 2026 
Marcin Kleczynski, founder and CEO of Malwarebytes who turned fixing infected PCs as a teen into a global cybersecurity company. He discusses AI-driven scams and how defenders adapt. He covers product strategy shifts, splitting consumer and B2B paths, and reorganizing leadership to scale. He also talks about identity protection, automated attacks using AI, and the discipline of evolving ahead of threats.
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Teen Hacker Launched Malwarebytes Into Profit
- Marcin Kleczynski started Malwarebytes as a teenager after fixing his family's infected PC and collaborating with internet volunteers.
- He launched Malwarebytes in 2008, sold lifetime licenses early on, and the company made its first million before he met a key co-founder in person.
Splitting Consumer And B2B Solved Market Fragmentation
- Marcin realized consumer and B2B security needs diverged and one product strategy couldn't serve both markets.
- He split Malwarebytes (consumer) and ThreatDown (B2B) with separate management to refocus product, go-to-market, and financial clarity.
Hire Complementary Leaders To Cover Your Weaknesses
- Hire partners who are the opposite of you to fill blind spots; specifically, find strong sales and marketing leaders if you're product-focused.
- Marcin says pairing an engineering founder with go-to-market talent avoids building great products nobody buys.