Company lists · Data refreshed October 2026

Top 25 Cybersecurity and defense software companies worldwide

Name: Cybersecurity and defense software companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 11,930 companies tracked

RevenueBase identified 11,930 company matches for cybersecurity and defense software companies worldwide as of October 2026 and tracks 525,640 professional contacts across them, including 148,293 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for cybersecurity and defense software 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 October 1, 2026. Country and city lists for cybersecurity and defense software 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 Oct 1, 2026 How this list was built

11,930Companies

525,640Contacts tracked

148,293Verified emails

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The 25 largest cybersecurity and defense software companies worldwide

Ranked by team size

Top 25 of 11,930 company matches for cybersecurity and defense software companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 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	Northrop Grumman	Exact match	Falls Church, VA, United StatesHQ recorded Oct 1, 2026	10001+	74,984 contacts →
	Exact match “We are a close-knit community of big thinkers collaborating to keep the world safe.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	Thales	Exact match	Meudon, FranceHQ recorded Oct 1, 2026	10001+	51,449 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 · Oct 1, 2026 · View company records in RevenueBase
3	L3harris Technologies	Exact match	Melbourne, FL, United StatesHQ recorded Oct 1, 2026	10001+	24,855 contacts →
	Exact match “L3Harris Technologies is the Trusted Disruptor in the defense industry.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4	Parsons Corporation	Exact match	Chantilly, VA, United StatesHQ recorded Oct 1, 2026	10001+	19,456 contacts →
	Exact match “Founded in 1944, Parsons Corporation, a digitally enabled solutions provider, is focused on creating the future of the defense, intelligence, and critical infrastructure markets.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5	Palo Alto Networks	Exact match	Santa Clara, CA, United StatesHQ recorded Oct 1, 2026	10001+	18,431 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 · Oct 1, 2026 · View company records in RevenueBase
6	Fortinet	Exact match	Sunnyvale, CA, United StatesHQ recorded Oct 1, 2026	10001+	14,289 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 · Oct 1, 2026 · View company records in RevenueBase
7	Aselsan	Exact match	Mehmet Akif Ersoy, TürkiyeHQ recorded Oct 1, 2026	10001+	12,657 contacts →
	Exact match “ASELSAN is a company of Turkish Armed Forces Foundation, established in 1975 in order to meet the communication needs of the Turkish Armed Forces by national means.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	Symantec	Exact match	San Jose, CA, United StatesHQ recorded Oct 1, 2026	10001+	11,169 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 · Oct 1, 2026 · View company records in RevenueBase
9	Peraton	Exact match	Reston, VA, United StatesHQ recorded Oct 1, 2026	10001+	10,793 contacts →
	Exact match “At Peraton, we're at the forefront of delivering the next big thing every day.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	Crowdstrike	Exact match	Remote, United StatesHQ recorded Oct 1, 2026	5,001-10,000	10,118 contacts →
	Exact match “CrowdStrike (Nasdaq: CRWD), a global cybersecurity leader, has redefined modern security with the world’s most advanced cloud-native platform for protecting critical areas of…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	Leonardo DRS	Exact match	Arlington, VA, United StatesHQ recorded Oct 1, 2026	5,001-10,000	5,980 contacts →
	Exact match “Leonardo DRS Inc.(Nasdaq: DRS) is at the forefront of developing transformative defense technologies using its proven agility and delivering innovative solutions for U.S.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	Trend Micro	Exact match	Yoyogi, JapanHQ recorded Oct 1, 2026	5,001-10,000	4,942 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 · Oct 1, 2026 · View company records in RevenueBase
13	Sophos	Exact match	Abingdon, United KingdomHQ recorded Oct 1, 2026	5,001-10,000	4,925 contacts →
	Exact match “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	Orange Cyberdefense	Exact match	Nanterre, FranceHQ recorded Oct 1, 2026	1,001-5,000	3,673 contacts →
	Exact match “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15	Trellix	Exact match	Plano, TX, United StatesHQ recorded Oct 1, 2026	1,001-5,000	3,447 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 · Oct 1, 2026 · View company records in RevenueBase
16	Sentinelone	Exact match	Mountain View, CA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	3,052 contacts →
	Exact match “SentinelOne is the world's leading AI-powered cybersecurity platform.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17	Rapid7	Exact match	Boston, MA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,822 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 · Oct 1, 2026 · View company records in RevenueBase
18	Ivanti	Exact match	South Jordan, UT, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,691 contacts →
	Exact match “Ivanti is a global enterprise IT and security software company that provides the trusted data authority for AI-driven, autonomous endpoint management.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	Darktrace	Exact match	Cambridge, United KingdomHQ recorded Oct 1, 2026	1,001-5,000	2,355 contacts →
	Exact match “Darktrace is a global leader in AI cybersecurity, providing the essential cybersecurity platform to secure organizations today and for an ever-changing future.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,222 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 · Oct 1, 2026 · View company records in RevenueBase
21	Bitdefender	Exact match	Bucharest, RomaniaHQ recorded Oct 1, 2026	1,001-5,000	2,172 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 · Oct 1, 2026 · View company records in RevenueBase
22	Barracuda	Exact match	Campbell, CA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,157 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 · Oct 1, 2026 · View company records in RevenueBase
23	Elbit Systems	Exact match	Haifa, IsraelHQ recorded Oct 1, 2026	10001+	2,116 contacts →
	Exact match “Elbit Systems is a leading global defense technology company, delivering advanced solutions for a secure and safer world.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24	Acronis	Exact match	Schaffhausen, SwitzerlandHQ recorded Oct 1, 2026	1,001-5,000	2,083 contacts →
	Exact match “Acronis is a global cyber protection company delivering the only natively integrated cybersecurity, data protection, and infrastructure management platform for managed service…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25	Rafael Advanced Defense Systems	Exact match	Haifa, IsraelHQ recorded Oct 1, 2026	5,001-10,000	1,799 contacts →
	Exact match “Rafael Advanced Defense Systems Ltd.” Recorded in the RevenueBase company graph · Oct 1, 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 “cybersecurity and defense software 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 11,930 cybersecurity and defense software companies worldwide

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Cybersecurity and defense software companies worldwide at a glance

As of Oct 1, 2026

28.2%Verified-email coverage

44.1Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · London

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

5,619

11-50

4,316

51-200

1,317

201-500

332

501-1,000

132

1,001-5,000

140

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 cybersecurity and defense software companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “cybersecurity and defense software 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 148,293 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 October 1, 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.

Cybersecurity and defense software companies by location

100 lists · largest first

Every Cybersecurity and defense software 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 “cybersecurity and defense software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity and defense software companies are there worldwide?

RevenueBase identified 11,930 company matches for cybersecurity and defense software companies worldwide as of October 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?

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

Which country has the most cybersecurity and defense software companies?

The United States leads with 2,175 companies, followed by India (1,152) and the United Kingdom (435). Every cybersecurity and defense software companies list by country and city is linked on this page.

Which city has the most cybersecurity and defense software companies?

London leads with 254 company records, followed by Dubai (150) and Sao Paulo (129).

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 148,293 professional contacts with verified work emails tracked across these 11,930 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 October 1, 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.