Company lists · Data refreshed September 2026

Top 25 Cybersecurity companies for communications worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 13,621 companies tracked

RevenueBase identified 13,621 cybersecurity companies for communications worldwide as of September 2026 and tracks 266,063 professional contacts across them, including 87,665 with verified work emails. The United States is the largest market and London the largest hub.

This list covers cybersecurity companies for communications 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 28, 2026. Country and city lists for cybersecurity companies for communications 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 28, 2026 86% judged on-target in blind review

13,621Companies

266,063Contacts tracked

87,665Verified emails

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The 25 largest cybersecurity companies for communications worldwide

Ranked by team size

Top 25 of 13,621 cybersecurity companies for communications worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity companies for communications: 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 28, 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 28, 2026
2	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 28, 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 28, 2026
3	Symantec	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 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 28, 2026
4	Sophos	Partial evidence	Abingdon, United KingdomHQ checked Sep 28, 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 28, 2026
5	Orange Cyberdefense	Partial evidence	Nanterre, FranceHQ checked Sep 28, 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 28, 2026
6	Trellix	Partial evidence	Plano, TX, United StatesHQ checked Sep 28, 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 28, 2026
7	Alcatel-Lucent Enterprise	Partial evidence	92707 Colombes, GermanyHQ checked Sep 28, 2026	1,001-5,000	2,811 contacts →
	Partial evidence “Alcatel-Lucent Enterprise provides secure networking and communication solutions which enable organizations and industries to accelerate their operational efficiencies and…” Source: RevenueBase Database · checked Sep 28, 2026
8	NIL LTD	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 28, 2026	n/a	2,523 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
9	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 28, 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 28, 2026
10	Bitdefender	Partial evidence	Bucuresti, RomaniaHQ checked Sep 28, 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 28, 2026
11	Barracuda	Partial evidence	Campbell, CA, United StatesHQ checked Sep 28, 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 28, 2026
12	Quick Heal	Indirect evidence	Pune, IndiaHQ checked Sep 28, 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 28, 2026
13	Site سايت	Indirect evidence	Al Nakheel, Saudi ArabiaHQ checked Sep 28, 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 28, 2026
14	Sangfor Technologies	Partial evidence	Shenzhen, ChinaHQ checked Sep 28, 2026	5,001-10,000	1,297 contacts →
	Partial evidence “Sangfor Technologies is a global leader in cybersecurity, cloud computing, and IT infrastructure, providing fully integrated and AI-driven solutions.” Source: RevenueBase Database · checked Sep 28, 2026
15	Thales Cybersecurity Products	Partial evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	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 28, 2026
16	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,232 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 28, 2026
17	Imperva	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	10001+	1,217 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 28, 2026
18	Tahaluf AL Emarat Technical Solutions تحالف الإمارات للحلول التقنية	Partial evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 28, 2026	501-1,000	1,159 contacts →
	Partial evidence “Founded in Abu Dhabi in 2015, Tahaluf has quickly established itself as one of the nation's top cybersecurity and IT companies and the leading government solutions provider for…” Source: RevenueBase Database · checked Sep 28, 2026
19	SALAM	Indirect evidence	Riyadh, Saudi ArabiaHQ checked Sep 28, 2026	1,001-5,000	1,045 contacts →
	Indirect evidence “Etihad Salam Telecom Company (Salam) is a leading Saudi telecommunications provider offering a comprehensive portfolio of next-generation solutions.” Source: RevenueBase Database · checked Sep 28, 2026
20	Seguritech	Indirect evidence	Ciudad De Mexico, MexicoHQ checked Sep 28, 2026	1,001-5,000	1,041 contacts →
	Indirect evidence “A lo largo de 30 años, hemos incursionado y evolucionado en distintas áreas atendiendo en el continente americano a clientes privados, corporativos y sector gobierno.” Source: RevenueBase Database · checked Sep 28, 2026
21	Irdeto	Partial evidence	Hoofddorp, NetherlandsHQ checked Sep 28, 2026	1,001-5,000	1,026 contacts →
	Partial evidence “Irdeto, a CANAL+ company, is the world leader in digital platform cybersecurity, empowering businesses to innovate for a secure, connected future.” Source: RevenueBase Database · checked Sep 28, 2026
22	Ensign Infosecurity	Partial evidence	SingaporeHQ checked Sep 28, 2026	501-1,000	888 contacts →
	Partial evidence “Ensign InfoSecurity is the largest pure-play end-to-end cybersecurity service provider in Asia.” Source: RevenueBase Database · checked Sep 28, 2026
23	Trustwave, A Levelblue Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	874 contacts →
	Partial evidence “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026
24	Quantum SKY	Indirect evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	872 contacts →
	Indirect evidence “Quantum Sky is a mission technology company that builds secure AI, cyber, cloud, and quantum capabilities for defense, intelligence, and federal civilian agencies.” Source: RevenueBase Database · checked Sep 28, 2026
25	ALLOT	Partial evidence	Hod-hasharon, IsraelHQ checked Sep 28, 2026	501-1,000	856 contacts →
	Partial evidence “Allot Ltd.(NASDAQ: ALLT, TASE: ALLT) is a provider of leading innovative converged cybersecurity solutions and network intelligence for service providers and enterprises…” Source: RevenueBase Database · checked Sep 28, 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 companies for communications. 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 companies for communications.
Partial evidence: Its own public description names part of cybersecurity companies for communications, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity companies for communications. 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 13,621 cybersecurity companies for communications worldwide

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Cybersecurity companies for communications worldwide at a glance

As of Sep 28, 2026

32.9%Verified-email coverage

19.5Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

6,717

11-50

4,960

51-200

1,362

201-500

325

501-1,000

107

1,001-5,000

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 cybersecurity companies for communications, 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 cybersecurity companies for communications are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “cybersecurity companies for communications”. 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 companies for communications), 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 companies for communications, 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, 87,665 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 28, 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 companies for communications by location

104 lists · largest first

Every Cybersecurity companies for communications 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 companies for communications, 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 companies for communications are there worldwide?

RevenueBase identified 13,621 cybersecurity companies for communications 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 cybersecurity companies for communications?

The United States leads with 2,881 companies, followed by India (1,034) and the United Kingdom (753). Every cybersecurity companies for communications list by country and city is linked on this page.

Which city has the most cybersecurity companies for communications?

London leads with 271 headquartered companies, followed by Dubai (156) and Sao Paulo (143).

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 87,665 verified decision-maker contacts tracked across these 13,621 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 28, 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.