Company lists · Data refreshed September 2026

Top 25 Big cybersecurity companies worldwide

Name: Big cybersecurity companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 11,450 companies tracked

RevenueBase identified 11,450 big cybersecurity companies worldwide as of September 2026 and tracks 305,236 professional contacts across them, including 112,974 with verified work emails. The United States is the largest market and London the largest hub.

This list covers big cybersecurity 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 21, 2026. Country and city lists for big cybersecurity 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

11,450Companies

305,236Contacts tracked

112,974Verified emails

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The 25 largest big cybersecurity companies worldwide

Ranked by team size

Top 25 of 11,450 big cybersecurity companies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to big cybersecurity 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	Palo Alto Networks	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 21, 2026	10001+	18,431 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 21, 2026
2	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 21, 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 Sep 21, 2026
3	Symantec	Partial evidence	San Jose, CA, United StatesHQ checked Sep 21, 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 Sep 21, 2026
4	Crowdstrike	Partial evidence	Remote, United StatesHQ checked Sep 21, 2026	5,001-10,000	10,118 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
5	Check Point Software	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 21, 2026	5,001-10,000	7,668 contacts →
	Indirect evidence “Check Point Software Technologies Ltd.” Source: RevenueBase Database · checked Sep 21, 2026
6	Trend Micro	Partial evidence	Yoyogi, JapanHQ checked Sep 21, 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 21, 2026
7	Sophos	Partial evidence	Abingdon, United KingdomHQ checked Sep 21, 2026	5,001-10,000	4,925 contacts →
	Partial evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Sep 21, 2026
8	F-Secure Corporation	Indirect evidence	Helsinki, FinlandHQ checked Sep 21, 2026	n/a	4,766 contacts →
	Indirect evidence “F-Secure is a human-first, AI-powered consumer cyber security experience company with 38 years of expertise in tackling digital threats.” Source: RevenueBase Database · checked Sep 21, 2026
9	Kaspersky	Indirect evidence	Stadtkreis 1 Altstadt, FranceHQ checked Sep 21, 2026	5,001-10,000	3,822 contacts →
	Indirect evidence “Our mission is simple – building a safer world.” Source: RevenueBase Database · checked Sep 21, 2026
10	Orange Cyberdefense	Partial evidence	Nanterre, FranceHQ checked Sep 21, 2026	1,001-5,000	3,673 contacts →
	Partial evidence “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Source: RevenueBase Database · checked Sep 21, 2026
11	Bugcrowd	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	n/a	3,649 contacts →
	Indirect 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 Sep 21, 2026
12	Trellix	Partial evidence	Plano, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,447 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 21, 2026
13	Netskope	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,056 contacts →
	Indirect evidence “Netskope (NASDAQ: NTSK), a leader in modern security and networking for the cloud and AI era, addresses the needs of both security and networking teams by providing optimized…” Source: RevenueBase Database · checked Sep 21, 2026
14	Sentinelone	Partial evidence	Mountain View, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,052 contacts →
	Partial evidence “SentinelOne is the world's leading AI-powered cybersecurity platform.” Source: RevenueBase Database · checked Sep 21, 2026
15	Rapid7	Partial evidence	Boston, MA, United StatesHQ checked Sep 21, 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 Sep 21, 2026
16	Infoblox	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,813 contacts →
	Indirect evidence “Infoblox unites networking and security to deliver unmatched performance and protection.” Source: RevenueBase Database · checked Sep 21, 2026
17	GEN	Indirect evidence	Tempe, United StatesHQ checked Sep 21, 2026	5,001-10,000	2,760 contacts →
	Indirect evidence “Gen (NASDAQ: GEN) is a global company dedicated to Powering Digital Freedom through its trusted Cyber Safety brands, Norton, Avast, LifeLock, MoneyLion and more.” Source: RevenueBase Database · checked Sep 21, 2026
18	Darktrace	Partial evidence	Cambridge, United KingdomHQ checked Sep 21, 2026	1,001-5,000	2,355 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 21, 2026
19	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,222 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 21, 2026
20	Bitdefender	Partial evidence	Bucuresti, RomaniaHQ checked Sep 21, 2026	1,001-5,000	2,172 contacts →
	Partial evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
21	Barracuda	Partial evidence	Campbell, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,157 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 21, 2026
22	Inspira Enterprise	Partial evidence	Mumbai, IndiaHQ checked Sep 21, 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 21, 2026
23	ESET	Indirect evidence	Bratislava, SlovakiaHQ checked Sep 21, 2026	1,001-5,000	1,719 contacts →
	Indirect evidence “When technology enables progress, ESET is here to protect it.” Source: RevenueBase Database · checked Sep 21, 2026
24	Fortra	Partial evidence	Eden Prairie, MN, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,648 contacts →
	Partial evidence “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Source: RevenueBase Database · checked Sep 21, 2026
25	Forcepoint	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,636 contacts →
	Indirect evidence “Forcepoint simplifies security for global businesses and governments.” Source: RevenueBase Database · checked Sep 21, 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: big cybersecurity 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 big cybersecurity companies.
Partial evidence: Its own public description names part of big cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big cybersecurity 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 11,450 big cybersecurity companies worldwide

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Big cybersecurity companies worldwide at a glance

As of Sep 21, 2026

37.0%Verified-email coverage

26.7Average contacts per company

11-50Median size (employees)

2.2%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

5,572

11-50

4,119

51-200

1,178

201-500

288

501-1,000

110

1,001-5,000

117

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 big cybersecurity 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: Every country. Country and city lists for big cybersecurity companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “big cybersecurity 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 big cybersecurity 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 big cybersecurity 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, 112,974 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 September 21, 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.

Big cybersecurity companies by location

70 lists · largest first

Every Big cybersecurity 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 big cybersecurity 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 big cybersecurity companies are there worldwide?

RevenueBase identified 11,450 big cybersecurity 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?

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

Which country has the most big cybersecurity companies?

The United States leads with 2,512 companies, followed by India (1,126) and the United Kingdom (594). Every big cybersecurity companies list by country and city is linked on this page.

Which city has the most big cybersecurity companies?

London leads with 255 headquartered companies, followed by Dubai (139) and Sao Paulo (131).

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 112,974 verified decision-maker contacts tracked across these 11,450 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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.