Company lists · Data refreshed November 2026

Top 25 Cyber defence companies worldwide

Name: Cyber defence companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 35,362 companies tracked

RevenueBase identified 35,362 company matches for cyber defence companies worldwide as of November 2026 and tracks 699,498 professional contacts across them, including 230,609 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for cyber defence companies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for cyber defence companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

35,362Companies

699,498Contacts tracked

230,609Verified emails

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The 25 largest cyber defence companies worldwide

Ranked by team size

Top 25 of 35,362 company matches for cyber defence companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Thales	Exact match	Meudon, FranceHQ recorded Nov 6, 2026	10001+	54,507 contacts →
	Exact match “Thales (Euronext Paris: HO) is a global leader in advanced technologies for the Defence, Aerospace, and Cyber & Digital sectors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Palo Alto Networks	Exact match	Santa Clara, United StatesHQ recorded Nov 6, 2026	10001+	21,906 contacts →
	Exact match “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Fortinet	Exact match	Sunnyvale, CA, United StatesHQ recorded Nov 6, 2026	10001+	15,414 contacts →
	Exact match “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Guidehouse	Exact match	Mclean, IL, United StatesHQ recorded Nov 6, 2026	10001+	13,603 contacts →
	Exact match “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Private Sector	Exact match	United StatesHQ recorded Nov 6, 2026	n/a	13,149 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Symantec	Exact match	San Jose, CA, United StatesHQ recorded Nov 6, 2026	10001+	11,878 contacts →
	Exact match “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Sophos	Exact match	Abingdon, United KingdomHQ recorded Nov 6, 2026	5,001-10,000	5,283 contacts →
	Exact match “Sophos, a global cybersecurity leader, defends more than organizations worldwide with Sophos Fusion, the industry's first and most complete AI-native cybersecurity defense system…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Orange Cyberdefense	Exact match	Nanterre, FranceHQ recorded Nov 6, 2026	1,001-5,000	3,977 contacts →
	Exact match “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Sicuritalia S.P.A	Exact match	Milan, ItalyHQ recorded Nov 6, 2026	10001+	3,593 contacts →
	Exact match “Il Gruppo Sicuritalia, con oltre 18.500 dipendenti, è la più grande azienda italiana ed il secondo player privato europeo in ambito Security.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Trellix	Exact match	Plano, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	3,510 contacts →
	Exact match “Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Arctic Wolf	Exact match	Eden Prairie, United StatesHQ recorded Nov 6, 2026	1,001-5,000	3,355 contacts →
	Exact match “Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	NRI Group	Exact match	Chiyoda-ku, NY, JapanHQ recorded Nov 6, 2026	10001+	3,248 contacts →
	Exact match “We align our goals with our clients’ goals – a true partnership that ensures shared success.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	GTT	Exact match	Arlington, VA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	3,071 contacts →
	Exact match “GTT is a leading networking and security as a service provider for multinational organizations, simply and securely connecting people and machines to data and applications –…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Rapid7	Exact match	Boston, United StatesHQ recorded Nov 6, 2026	1,001-5,000	3,060 contacts →
	Exact match “Rapid7, Inc.(NASDAQ: RPD) is a global leader in AI-powered managed cybersecurity operations, trusted to advance organizations’ cyber resilience.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Trend Micro	Exact match	Yoyogi, JapanHQ recorded Nov 6, 2026	5,001-10,000	2,797 contacts →
	Exact match “We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	NIL LTD	Exact match	Ljubljana, SloveniaHQ recorded Nov 6, 2026	n/a	2,639 contacts →
	Exact match “NIL is a globally recognized provider of advanced data center, network, cloud, cyber security solutions as well as services for business and industry environments, state…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Barracuda	Exact match	Campbell, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,408 contacts →
	Exact match “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Bitdefender	Exact match	Bucharest, RomaniaHQ recorded Nov 6, 2026	1,001-5,000	2,274 contacts →
	Exact match “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,171 contacts →
	Exact match “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Rafael Advanced Defense Systems	Exact match	Haifa, IsraelHQ recorded Nov 6, 2026	5,001-10,000	1,969 contacts →
	Exact match “Rafael Advanced Defense Systems Ltd.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Nov 6, 2026	10001+	1,928 contacts →
	Exact match “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Eplus INC	Exact match	Herndon, VA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,901 contacts →
	Exact match “ePlus is a customer-first, services-led, results-driven and trusted industry leader that helps organizations secure, modernize, optimize, and scale every aspect of their IT…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Inspira Enterprise	Exact match	Mumbai, IndiaHQ recorded Nov 6, 2026	1,001-5,000	1,859 contacts →
	Exact match “Inspira Enterprise is a global Cybersecurity & Data Analytics & AI services provider with a presence in North America, ASEAN, Middle East, India, and Africa regions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	ESET	Exact match	Bratislava, SlovakiaHQ recorded Nov 6, 2026	1,001-5,000	1,833 contacts →
	Exact match “When technology enables progress, ESET is here to protect it.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Beyondtrust	Exact match	Johns Creek, GA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,770 contacts →
	Exact match “BeyondTrust is the global cybersecurity leader protecting Paths to Privilege™.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “cyber defence companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 35,362 cyber defence companies worldwide

See the full list, filter by size, metro and specialty, and access 230,609 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cyber defence companies worldwide at a glance

As of Nov 6, 2026

33.0%Verified-email coverage

19.8Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

18,973

11-50

11,794

51-200

3,203

201-500

708

501-1,000

244

1,001-5,000

221

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for cyber defence companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “cyber defence companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 230,609 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Cyber defence companies by location

237 lists · largest first

Every Cyber defence companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “cyber defence companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cyber defence companies are there worldwide?

RevenueBase identified 35,362 company matches for cyber defence companies worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Thales tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most cyber defence companies?

The United States leads with 9,259 companies, followed by India (2,773) and the United Kingdom (2,118). Every cyber defence companies list by country and city is linked on this page.

Which city has the most cyber defence companies?

London leads with 799 company records, followed by Dubai (347) and Sao Paulo (344).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 230,609 professional contacts with verified work emails tracked across these 35,362 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.