Our Vision

We believe that everyone has a fundamental right to a malware-free existence.

Our Mission

To create the best disinfection and protection solutions to combat the world’s most harmful Internet threats.

Our Story

Back in 2004, Marcin Kleczynski picked up a nasty malware infection one day while cruising the Internet in search of video games. This despite having a popular paid antivirus in place. (Sound familiar?)

No big deal. He worked as a computer tech after school. How long could it take to remove a small bit of malicious code?

Try three solid days.

Three days searching the Internet and consulting with other people on security forums who had similar problems. Who had also come to the same two conclusions:

  1. There was a lot of new malware out there.
  2. Antivirus couldn’t handle it.

So Marcin set out to build the world a better malware fighter. He taught himself code and eventually engineered a small but highly effective anti-malware tool, the precursor to Malwarebytes Anti-Malware, that quickly became popular in the security community.

More importantly, in the community Marcin discovered a fanatical band of malware experts. They dissected malicious code, traded malware intel, and helped desperate folks who came to the message boards in search of answers.

So when it came to expanding the Malwarebytes team, he hired from this band. They knew what worked, what didn’t, and were completely comfortable breaking with conventional wisdom.

Today, the team numbers more than 200 and is distributed globally, with offices in San Jose, California, Clearwater, Florida, Tallinn, Estonia, and Cork, Ireland.

Malwarebytes products have been downloaded over 500 million times and have removed over five billion pieces of malware. The Malwarebytes line has expanded to include purpose-built business products that now protect over 50,000 businesses. Revenue has grown 100% year over year.

Our story is unique, very unique, in the Internet security industry, as are our products. But we reckon you’re reading this because you also have a unique problem. We can help.


Marcin Kleczynski
Chief Executive Officer

Marcin wrote the first version of Malwarebytes in 2004 and founded the company four years later. Today, he leads more than 250 employees in 14 countries, overseeing the strategic expansion of the business, as well as the long-term vision for the research and development teams. Marcin has been recognized for his work in cybersecurity, receiving the Ernst and Young Entrepreneur of the Year award in 2014, and being named to the Forbes 30 Under 30.

Rebecca Kline
Chief Operating Officer

In 2011, Rebecca signed on as the first marketer and e-commerce expert at Malwarebytes. She built out the marketing department and now runs operations for the company. As COO, she has created explosive growth in the B2B and B2C markets, and helped to elevate product awareness in the industry.

Mark Harris
Chief Financial Officer

As CFO, Mark oversees accounting, financial planning and analysis, investor relations, internal audit, and tax functions at Malwarebytes. Prior to joining in 2014, he led a $350m trade sale at a near-record revenue multiple, a $150m IPO on the Full London Stock Exchange, and several successful VC/debt raises with top-tier investors.

Bruce Harrison
VP of Research

Bruce co-founded Malwarebytes in 2008 with CEO Marcin Kleczynski. He's the original visionary of the research team, a group of handpicked security experts and researchers that spans the globe. Bruce's work ensures that Malwarebytes continues to offer industry-leading protection against the latest advanced threats.

Thomas Miller
SVP of Sales

Tom leads all of sales and business development worldwide. He joined Malwarebytes in 2014 and is responsible for driving all enterprise, SMB, and channel sales across all verticals.

Mark Patton
VP of Engineering

Since 2014, Mark has led the engineering teams responsible for the development, testing, and delivery of our award-winning products, as well as the technology that supports our research teams.

Fernando Francisco
VP of Corporate Development & Strategy

Fernando leads international business development strategy, focusing on the company's worldwide market penetration. Since joining Malwarebytes in 2011, he has opened an office in Estonia, created the mobile product, and expanded channel partnerships through mergers and acquisitions.

Chad Bacher
VP of Products

Chad leads the product management team responsible for defining and executing the go-to-market strategy for the entire Malwarebytes product portfolio. He joined Malwarebytes in 2014, with more than 15 years of experience in the security and high-tech industries.

Pedro Bustamante
VP of Technology

Pedro envisions the future of advancements and threats that will impact the industry while leading his innovative team of engineers and developers to find proactive solutions. Pedro joined Malwarebytes in 2013 and was the co-founder of the company's anti-exploit technology.

"I used to volunteer for years on malware removal forums where I helped people to clean up malware, teach people how to prevent malware and made some of my own small removal tools to deal with malware. This was (and still is) my passion. Malwarebytes was built out of people from the same community, who share the same passion. A great product can only exist if there are passionate people behind it, and I wanted to become a part of this."

Mieke, Director of Research, Europe