Company lists · Data refreshed September 2026

Top 25 Cybersecurity defense companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 15,806 companies tracked

RevenueBase identified 15,806 cybersecurity defense companies worldwide as of September 2026 and tracks 369,737 professional contacts across them, including 126,330 with verified work emails and 70,317 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers cybersecurity defense companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 1, 2026. Country and city lists for cybersecurity defense companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

15,806Companies

369,737Contacts tracked

126,330Verified emails

70,317Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest cybersecurity defense companies worldwide

Ranked by team size

Top 25 of 15,806 cybersecurity defense companies worldwide, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity defense companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	L3harris Technologies	Partial evidence	Melbourne, FL, US	10001+	24,757 contacts →
	Partial evidence “L3Harris Technologies is the Trusted Disruptor in the defense industry.” Source: RevenueBase Database · checked Sep 1, 2026
2	Palo Alto Networks	Partial evidence	He, NL	10001+	18,430 contacts →
	Partial evidence “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Source: RevenueBase Database · checked Sep 1, 2026
3	Fortinet	Indirect evidence	Ottawa, ON, CA	10001+	14,326 contacts →
	Indirect evidence “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Source: RevenueBase Database · checked Sep 1, 2026
4	Symantec	Partial evidence	San Jose, CA, US	10001+	11,179 contacts →
	Partial evidence “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Source: RevenueBase Database · checked Sep 1, 2026
5	Sophos	Strong evidence	Abingdon, GB	5,001-10,000	4,963 contacts →
	Strong evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Sep 1, 2026
6	Trend Micro	Partial evidence	Yoyogi, JapanHQ checked Sep 1, 2026	5,001-10,000	4,942 contacts →
	Partial evidence “We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Source: RevenueBase Database · checked Sep 1, 2026
7	Orange Cyberdefense	Partial evidence	BE	1,001-5,000	3,706 contacts →
	Partial evidence “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Source: RevenueBase Database · checked Sep 1, 2026
8	Trellix	Partial evidence	Plano, TX, US	1,001-5,000	3,490 contacts →
	Partial evidence “Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.” Source: RevenueBase Database · checked Sep 1, 2026
9	Arctic Wolf	Indirect evidence	Waterloo, ON, CA	1,001-5,000	3,200 contacts →
	Indirect evidence “Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Source: RevenueBase Database · checked Sep 1, 2026
10	Sentinelone	Partial evidence	Mountain View, CA, US	1,001-5,000	3,046 contacts →
	Partial evidence “SentinelOne is the world's leading AI-powered cybersecurity platform.” Source: RevenueBase Database · checked Sep 1, 2026
11	Darktrace	Partial evidence	Cambridge, GB	1,001-5,000	2,590 contacts →
	Partial evidence “Darktrace is a global leader in AI cybersecurity, providing the essential cybersecurity platform to secure organizations today and for an ever-changing future.” Source: RevenueBase Database · checked Sep 1, 2026
12	OPTIV	Indirect evidence	Chantilly, VA, US	1,001-5,000	2,206 contacts →
	Indirect evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 1, 2026
13	Bitdefender	Partial evidence	Fort Lauderdale, FL, US	1,001-5,000	2,141 contacts →
	Partial evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Sep 1, 2026
14	Barracuda	Partial evidence	Alpharetta, GA, US	1,001-5,000	2,108 contacts →
	Partial evidence “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Source: RevenueBase Database · checked Sep 1, 2026
15	Inspira Enterprise	Partial evidence	Mumbai, IndiaHQ checked Sep 1, 2026	1,001-5,000	1,773 contacts →
	Partial evidence “Inspira Enterprise is a global Cybersecurity & Data Analytics & AI services provider with a presence in North America, ASEAN, Middle East, India, and Africa regions.” Source: RevenueBase Database · checked Sep 1, 2026
16	Fortra	Partial evidence	Eden Prairie, MN, US	1,001-5,000	1,640 contacts →
	Partial evidence “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Source: RevenueBase Database · checked Sep 1, 2026
17	Quick Heal	Indirect evidence	Pune, IndiaHQ checked Sep 1, 2026	1,001-5,000	1,510 contacts →
	Indirect evidence “Quick Heal Technologies Limited is one of the leading providers of IT Security and Data Protection Solutions with a strong footprint in India and an evolving global presence.” Source: RevenueBase Database · checked Sep 1, 2026
18	Site سايت	Indirect evidence	Al Nakheel, Saudi ArabiaHQ checked Sep 1, 2026	501-1,000	1,378 contacts →
	Indirect evidence “We are established for enriching local content in designing, developing, and operating secure digital computing environments through Saudi talents, by fulfilling our role as a…” Source: RevenueBase Database · checked Sep 1, 2026
19	Thales Cybersecurity Products	Partial evidence	Austin, TX, US	1,001-5,000	1,252 contacts →
	Partial evidence “Thales is a global leader in cybersecurity, helping the most trusted organizations in the world protect their most critical applications, data, and identities anywhere at scale.” Source: RevenueBase Database · checked Sep 1, 2026
20	Guidepoint Security	Partial evidence	Tampa, FL, US	1,001-5,000	1,234 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 1, 2026
21	Imperva	Indirect evidence	Austin, TX, US	10001+	1,211 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 1, 2026
22	Opswat	Indirect evidence	Veszprem, HU	501-1,000	1,107 contacts →
	Indirect evidence “OPSWAT protects critical infrastructure.” Source: RevenueBase Database · checked Sep 1, 2026
23	Irdeto	Partial evidence	Wroclaw, PL	1,001-5,000	1,062 contacts →
	Partial evidence “Irdeto is the world leader in digital platform cybersecurity, empowering businesses to innovate for a secure, connected future.” Source: RevenueBase Database · checked Sep 1, 2026
24	Watchguard Technologies	Indirect evidence	Seattle, WA, US	1,001-5,000	1,054 contacts →
	Indirect evidence “WatchGuard® Technologies, Inc.” Source: RevenueBase Database · checked Sep 1, 2026
25	Coalfire	Partial evidence	Chicago, IL, US	1,001-5,000	960 contacts →
	Partial evidence “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: RevenueBase Database · checked Sep 1, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cybersecurity defense companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names cybersecurity defense companies.
Partial evidence: Its own public description names part of cybersecurity defense companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity defense companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 15,806 cybersecurity defense companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 126,330 reachable decision-makers.

Free signup · no credit card

View the full list →

Cybersecurity defense companies worldwide at a glance

As of Sep 1, 2026

34.2%Verified-email coverage

19.0%Mobile-number coverage

23.4Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · London

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

8,162

11-50

5,463

51-200

1,539

201-500

336

501-1,000

116

1,001-5,000

103

5,001-10,000

10001+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among cybersecurity defense companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: 60 countries, largest first: the United States, India, the United Kingdom, Canada, Australia, Brazil, France, Germany, Spain, the United Arab Emirates and 50 more. Country and city lists for cybersecurity defense companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “cybersecurity defense companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names cybersecurity defense companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among cybersecurity defense companies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 126,330 across the full list. 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 between September 1, 2026 and September 14, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Cybersecurity defense companies by location

128 lists · largest first

Every Cybersecurity defense 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names cybersecurity defense companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many cybersecurity defense companies are there worldwide?

RevenueBase identified 15,806 cybersecurity defense companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

L3harris Technologies, headquartered in Melbourne, tops this list with the largest team on record.

Which country has the most cybersecurity defense companies?

The United States leads with 4,902 companies, followed by India (1,600) and the United Kingdom (1,147). Every cybersecurity defense companies list by country and city is linked on this page.

Which city has the most cybersecurity defense companies?

London leads with 487 headquartered companies, followed by Sao Paulo (207) and Dubai (202).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 126,330 verified decision-maker contacts tracked across these 15,806 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled from the company graph between September 1, 2026 and September 14, 2026.

Ready to reach these companies? Verified emails and direct dials for all 15,806 cybersecurity defense companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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 Smart Search, 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.