# Malwarebytes

Malwarebytes is a Cybersecurity based in Santa Clara, United States.

## Overview

- **Organization type:** Cybersecurity
- **Headquarters:** Santa Clara, United States
- **Region:** North America
- **Address:** Santa Clara, CA, United States
- **Founded:** 2008
- **Assets under management:** Undisclosed
- **Website:** malwarebytes.com
- **LinkedIn:** https://www.linkedin.com/company/malwarebytes

## Regulatory record

- **Reports private funds:** No

## About

Kleczynski founded Malwarebytes in 2008 after co-developing a free anti-malware tool on a tech forum at age 14. The company incorporated in Illinois, later moving its headquarters to Santa Clara. It remains privately held, with Kleczynski as CEO and a board that includes former Symantec executives. Highland Europe led a single minority growth investment of $100 million in 2018, the firm's first and only outside institutional capital, valuing the business at roughly $1.3 billion at that time. Malwarebytes deploys across three product lines — consumer endpoint protection, a managed detection-and-response service for small-to-midsize businesses, and a threat-down platform for IT-managed service providers. Its consumer business, funded by subscriptions from a user base that exceeded 60 million monthly active devices in 2023, produces the majority of revenue. The enterprise segment added cloud-based endpoint protection and vulnerability assessment modules in 2022. The firm does not operate as a fund; it functions as an operating company that self-funds product development from free cash flow. The company employs roughly 1,000 people across offices in Santa Clara, Clearwater, Cork, and Tallinn. In January 2023, Malwarebytes announced a restructuring that eliminated approximately 125 positions, tightening its focus on the SMB and MSP segments. Kleczynski has publicly committed to keeping the company independent, stating he views cybersecurity as a generational business rather than a near-term exit. Unlike nearly every cybersecurity firm at its scale, Malwarebytes has a genuinely non-standard capital structure — no venture capital syndicate, no private equity control, and no debt-fueled acquisition spree. Kleczynski and his early team still control the majority of the equity, making the firm one of the largest employee- and founder-owned cybersecurity companies operating globally.

## Sectors

- Cybersecurity
- Enterprise Software

## Offices

- Clearwater, FL, United States
- Cork, Ireland
- Tallinn, Estonia

## People

- Marcin Kleczynski — CEO

## Questions

### How does Malwarebytes fund operations without traditional venture backing?

The company has operated primarily on consumer subscription revenue since its early days. Its free remediation tool served as a customer acquisition engine, converting a portion of users into paid premium subscribers. That cash flow funded product development for nearly a decade before the single 2018 institutional round.

### Does Malwarebytes serve enterprise customers or only consumers?

The company serves both. Its consumer antivirus and privacy products remain the revenue foundation, but it has aggressively built out a business portfolio including endpoint detection and response, managed services for IT providers, and cloud-native security modules. Roughly 60% of Fortune 500 firms use at least one Malwarebytes product for incident response or remediation, even when another vendor serves as their primary endpoint protection.

### Is Malwarebytes positioning for an IPO or acquisition?

Kleczynski has stated publicly that he views cybersecurity as a generational opportunity and is not building the company toward a near-term exit. The January 2023 restructuring prioritized profitability and independence over growth-at-all-costs. No S-1 filing or formal sale process has been reported.

### How is Malwarebytes structured geographically?

Corporate headquarters sit in Santa Clara, California, with a secondary US office in Clearwater, Florida. International offices include a European hub in Cork, Ireland, and an engineering center in Tallinn, Estonia. The Tallinn office is significant — it houses the core threat research and malware reverse-engineering team.

## Related profiles

- [Intertek](https://altss.com/profile/intertek-group-plc)

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Last updated: 2026-06-03T20:00:00.000Z

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