Insights

Comprehensive Security Approach DEFION Security offers an integrated Active Defense strategy combining prevention, detection, and response, making it an appealing partner for organizations seeking holistic cybersecurity solutions aligned with evolving regulatory requirements like NIS2, DORA, and CRA.

Research and Innovation Through DEFION Research Labs, the company demonstrates its commitment to cutting-edge threat discovery and vulnerability research, providing opportunities to collaborate with organizations interested in advanced threat intelligence and proactive security measures.

Regulatory Compliance Focus With expertise in helping clients meet complex cybersecurity regulations, DEFION Security positions itself well to serve enterprises in highly regulated industries such as finance, healthcare, and critical infrastructure looking for compliance-focused cybersecurity services.

Global Presence and Capacity Having offices in the Netherlands and Spain with a team of over 100 experts highlights its capacity to support European organizations, particularly those seeking regional cybersecurity partners with regional expertise and service capabilities.

Growth within Industry Ecosystem Supported by partnerships with cybersecurity firms and investors like Computest and Mentha Capital, DEFION Security is positioned to capitalize on industry growth trends and expanding enterprise cybersecurity budgets driven by increasing cyber threats.

DEFION Security Tech Stack

DEFION Security uses 8 technology products and services including Linkedin Insight Tag, Postman, Font Awesome, and more. Explore DEFION Security's tech stack below.

  • Linkedin Insight Tag
    Analytics
  • Postman
    Data Management Platforms
  • Font Awesome
    Font Scripts
  • Microsoft
    Miscellaneous
  • Erlang
    Programming Languages
  • X-XSS-Protection
    Security
  • Piwik
    System Analytics & Monitoring
  • Twitter
    Widgets

DEFION Security's Email Address Formats

DEFION Security uses at least 2 format(s):
DEFION Security Email FormatsExamplePercentage
FLast@computest.nlJDoe@computest.nl
63%
First@computest.nlJohn@computest.nl
16%
FMiddleLast@computest.nlJMichaelDoe@computest.nl
17%
FirstLast@computest.nlJohnDoe@computest.nl
4%

Frequently Asked Questions

Where is DEFION Security's headquarters located?

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DEFION Security's main headquarters is located at Netherlands. The company has employees across 2 continents, including EuropeAsia.

What is DEFION Security's official website and social media links?

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DEFION Security's official website is defion.security and has social profiles on LinkedIn.

What is DEFION Security's NAICS code?

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DEFION Security's NAICS code is 5415 - Computer Systems Design and Related Services.

How many employees does DEFION Security have currently?

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As of February 2026, DEFION Security has approximately 85 employees across 2 continents, including EuropeAsia. Key team members include Chief Executive Officer: H. R.Cfo Defion Security: T. H.Chief Client Officer Benelux: T. P.. Explore DEFION Security's employee directory with LeadIQ.

What industry does DEFION Security belong to?

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DEFION Security operates in the Computer and Network Security industry.

What technology does DEFION Security use?

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DEFION Security's tech stack includes Linkedin Insight TagPostmanFont AwesomeMicrosoftErlangX-XSS-ProtectionPiwikTwitter.

What is DEFION Security's email format?

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DEFION Security's email format typically follows the pattern of FLast@computest.nl. Find more DEFION Security email formats with LeadIQ.

When was DEFION Security founded?

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DEFION Security was founded in 1997.

DEFION Security

Computer and Network SecurityNetherlands51-200 Employees

DEFION Security is an independent, full-service cybersecurity specialist with offices in the Netherlands and Spain and a team of 100+ experts.

From our Active Defense approach, we help our clients:
•	Reduce cyber risk exposure
•	Comply with complex cybersecurity regulations, like NIS2, DORA and CRA
•	Strengthen overall resilience and business continuity

We connect prevention, detection, and response into one integrated security strategy – delivering not just technical expertise, but strategic advisory at the executive level. Our guidance enables leadership to align cybersecurity with business priorities and make informed investment decisions.

Through DEFION Research Labs, we:
•	Discover new vulnerabilities
•	Dissect emerging threats
•	Collaborate with public partners and positively impact society

This unique blend of frontline expertise and applied research ensures our clients are protected today and prepared for tomorrow.

Learn more at defion.security

Section iconCompany Overview

Headquarters
Netherlands
NAICS Code
5415 - Computer Systems Design and Related Services
Founded
1997
Employees
51-200

Section iconFunding & Financials

  • $25M$50M

    DEFION Security's revenue is estimated to be in the range of $25M$50M

Section iconFunding & Financials

  • $25M$50M

    DEFION Security's revenue is estimated to be in the range of $25M$50M

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