Company lists · Data refreshed October 2026

Top 25 Cyber security firms worldwide

Name: Cyber security firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 22,176 companies tracked

RevenueBase identified 22,176 cyber security firms worldwide as of October 2026 and tracks 400,691 professional contacts across them, including 136,860 with verified work emails. The United States is the largest market and London the largest hub.

This list covers cyber security firms 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 October 1, 2026. Country and city lists for cyber security firms 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Oct 1, 2026 86% judged on-target in blind review

22,176Companies

400,691Contacts tracked

136,860Verified emails

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The 25 largest cyber security firms worldwide

Ranked by team size

Top 25 of 22,176 cyber security firms worldwide, ranked by team size, largest first. Data refreshed Oct 1, 2026. RevenueBase Smart Search rates how each company's information relates to cyber security firms: 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	Palo Alto Networks	Indirect evidence	Santa Clara, CA, United StatesHQ checked Oct 1, 2026	10001+	18,431 contacts →
	Indirect 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 Oct 1, 2026
2	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Oct 1, 2026	10001+	14,289 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 Oct 1, 2026
3	Private Sector	Indirect evidence	United StatesHQ checked Oct 1, 2026	n/a	12,771 contacts →
	Indirect evidence Source: RevenueBase Database · checked Oct 1, 2026
4	Symantec	Partial evidence	San Jose, CA, United StatesHQ checked Oct 1, 2026	10001+	11,169 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 Oct 1, 2026
5	Trend Micro	Indirect evidence	Yoyogi, JapanHQ checked Oct 1, 2026	5,001-10,000	4,942 contacts →
	Indirect evidence “We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Source: RevenueBase Database · checked Oct 1, 2026
6	Sophos	Indirect evidence	Abingdon, United KingdomHQ checked Oct 1, 2026	5,001-10,000	4,925 contacts →
	Indirect evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Oct 1, 2026
7	Kaspersky	Indirect evidence	Stadtkreis 1 Altstadt, FranceHQ checked Oct 1, 2026	5,001-10,000	3,822 contacts →
	Indirect evidence “Our mission is simple – building a safer world.” Source: RevenueBase Database · checked Oct 1, 2026
8	Orange Cyberdefense	Indirect evidence	Nanterre, FranceHQ checked Oct 1, 2026	1,001-5,000	3,673 contacts →
	Indirect evidence “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Source: RevenueBase Database · checked Oct 1, 2026
9	Bugcrowd	Partial evidence	San Francisco, CA, United StatesHQ checked Oct 1, 2026	n/a	3,649 contacts →
	Partial evidence “We are a crowdsourced security company that safeguards organizations' assets from sophisticated threat actors before they can strike-by uniting our customers with trusted hackers…” Source: RevenueBase Database · checked Oct 1, 2026
10	Trellix	Strong evidence	Plano, TX, United StatesHQ checked Oct 1, 2026	1,001-5,000	3,447 contacts →
	Strong 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 Oct 1, 2026
11	Arctic Wolf	Indirect evidence	Eden Prairie, MN, United StatesHQ checked Oct 1, 2026	1,001-5,000	3,145 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 Oct 1, 2026
12	Sentinelone	Indirect evidence	Mountain View, CA, United StatesHQ checked Oct 1, 2026	1,001-5,000	3,052 contacts →
	Indirect evidence “SentinelOne is the world's leading AI-powered cybersecurity platform.” Source: RevenueBase Database · checked Oct 1, 2026
13	Sailpoint	Indirect evidence	Austin, TX, United StatesHQ checked Oct 1, 2026	1,001-5,000	2,886 contacts →
	Indirect evidence “SailPoint equips the modern enterprise to seamlessly manage and secure access to applications and data through the lens of identity – at speed and scale.” Source: RevenueBase Database · checked Oct 1, 2026
14	Rapid7	Partial evidence	Boston, MA, United StatesHQ checked Oct 1, 2026	1,001-5,000	2,822 contacts →
	Partial evidence “Rapid7, Inc.(NASDAQ: RPD) is a global leader in AI-powered managed cybersecurity operations, trusted to advance organizations’ cyber resilience.” Source: RevenueBase Database · checked Oct 1, 2026
15	Darktrace	Indirect evidence	Cambridge, United KingdomHQ checked Oct 1, 2026	1,001-5,000	2,355 contacts →
	Indirect 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 Oct 1, 2026
16	Mimecast	Indirect evidence	London, United KingdomHQ checked Oct 1, 2026	1,001-5,000	2,304 contacts →
	Indirect evidence “organizations.” Source: RevenueBase Database · checked Oct 1, 2026
17	OPTIV	Partial evidence	Leawood, KS, United StatesHQ checked Oct 1, 2026	1,001-5,000	2,222 contacts →
	Partial 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 Oct 1, 2026
18	Bitdefender	Indirect evidence	Bucharest, RomaniaHQ checked Oct 1, 2026	1,001-5,000	2,172 contacts →
	Indirect evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Oct 1, 2026
19	Barracuda	Indirect evidence	Campbell, CA, United StatesHQ checked Oct 1, 2026	1,001-5,000	2,157 contacts →
	Indirect evidence “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Source: RevenueBase Database · checked Oct 1, 2026
20	Inspira Enterprise	Indirect evidence	Mumbai, IndiaHQ checked Oct 1, 2026	1,001-5,000	1,773 contacts →
	Indirect 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 Oct 1, 2026
21	ESET	Indirect evidence	Bratislava, SlovakiaHQ checked Oct 1, 2026	1,001-5,000	1,719 contacts →
	Indirect evidence “When technology enables progress, ESET is here to protect it.” Source: RevenueBase Database · checked Oct 1, 2026
22	Beyondtrust	Indirect evidence	Johns Creek, GA, United StatesHQ checked Oct 1, 2026	1,001-5,000	1,669 contacts →
	Indirect evidence “BeyondTrust is the global cybersecurity leader protecting Paths to Privilege™.” Source: RevenueBase Database · checked Oct 1, 2026
23	Fortra	Indirect evidence	Eden Prairie, MN, United StatesHQ checked Oct 1, 2026	1,001-5,000	1,648 contacts →
	Indirect evidence “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Source: RevenueBase Database · checked Oct 1, 2026
24	Quick Heal	Partial evidence	Pune, IndiaHQ checked Oct 1, 2026	1,001-5,000	1,510 contacts →
	Partial 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 Oct 1, 2026
25	Site سايت	Indirect evidence	Al Nakheel, Saudi ArabiaHQ checked Oct 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 Oct 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: cyber security firms. 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 cyber security firms.
Partial evidence: Its own public description names part of cyber security firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cyber security firms. 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 22,176 cyber security firms worldwide

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Cyber security firms worldwide at a glance

As of Oct 1, 2026

34.2%Verified-email coverage

18.1Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · London

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

12,120

11-50

7,332

51-200

1,919

201-500

442

501-1,000

144

1,001-5,000

132

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 cyber security firms, 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: Every country. Country and city lists for cyber security firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “cyber security firms”. 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 cyber security firms), 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 cyber security firms, 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, 136,860 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 on October 1, 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.

Cyber security firms by location

130 lists · largest first

Every Cyber security firms 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 cyber security firms, 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 cyber security firms are there worldwide?

RevenueBase identified 22,176 cyber security firms worldwide as of October 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?

Palo Alto Networks, headquartered in Santa Clara, tops this list with the largest team on record.

Which country has the most cyber security firms?

The United States leads with 5,634 companies, followed by India (1,871) and the United Kingdom (1,331). Every cyber security firms list by country and city is linked on this page.

Which city has the most cyber security firms?

London leads with 562 headquartered companies, followed by Dubai (229) and Sao Paulo (223).

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 136,860 verified decision-maker contacts tracked across these 22,176 companies.

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 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.