Company lists · Data refreshed September 2026

Top 25 Telecommunications cybersecurity firms worldwide

Name: Telecommunications cybersecurity firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 12,085 companies tracked

RevenueBase identified 12,085 company matches for telecommunications cybersecurity firms worldwide as of September 2026 and tracks 218,226 professional contacts across them, including 74,520 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for telecommunications cybersecurity firms 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 September 29, 2026. Country and city lists for telecommunications cybersecurity firms 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 Sep 29, 2026 How this list was built

12,085Companies

218,226Contacts tracked

74,520Verified emails

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The 25 largest telecommunications cybersecurity firms worldwide

Ranked by team size

Top 25 of 12,085 company matches for telecommunications cybersecurity firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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	Palo Alto Networks	Exact match	Santa Clara, CA, United StatesHQ recorded Sep 29, 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 · Sep 29, 2026 · View company records in RevenueBase
2	Fortinet	Exact match	Sunnyvale, CA, United StatesHQ recorded Sep 29, 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 · Sep 29, 2026 · View company records in RevenueBase
3	Symantec	Exact match	San Jose, CA, United StatesHQ recorded Sep 29, 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 · Sep 29, 2026 · View company records in RevenueBase
4	Sophos	Exact match	Abingdon, United KingdomHQ recorded Sep 29, 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 · Sep 29, 2026 · View company records in RevenueBase
5	Orange Cyberdefense	Exact match	Nanterre, FranceHQ recorded Sep 29, 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 · Sep 29, 2026 · View company records in RevenueBase
6	Trellix	Exact match	Plano, TX, United StatesHQ recorded Sep 29, 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 · Sep 29, 2026 · View company records in RevenueBase
7	Alcatel-Lucent Enterprise	Exact match	92707 Colombes, GermanyHQ recorded Sep 29, 2026	1,001-5,000	2,811 contacts →
	Exact match “Alcatel-Lucent Enterprise provides secure networking and communication solutions which enable organizations and industries to accelerate their operational efficiencies and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Bitdefender	Exact match	Bucuresti, RomaniaHQ recorded Sep 29, 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 · Sep 29, 2026 · View company records in RevenueBase
9	Quick Heal	Exact match	Pune, IndiaHQ recorded Sep 29, 2026	1,001-5,000	1,510 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Thales Cybersecurity Products	Exact match	Austin, TX, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,252 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,232 contacts →
	Exact match “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Imperva	Exact match	Austin, TX, United StatesHQ recorded Sep 29, 2026	10001+	1,217 contacts →
	Exact match “On Dec.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Irdeto	Exact match	Hoofddorp, NetherlandsHQ recorded Sep 29, 2026	1,001-5,000	1,026 contacts →
	Exact match “Irdeto, a CANAL+ company, is the world leader in digital platform cybersecurity, empowering businesses to innovate for a secure, connected future.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Puntonet S.A	Exact match	Quito, EcuadorHQ recorded Sep 29, 2026	1,001-5,000	882 contacts →
	Exact match “Puntonet, una de las empresas líderes en telecomunicaciones y con mayor crecimiento en Ecuador, cuenta con una sólida infraestructura, procesos seguros y un alto sentido humano.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Trustwave, A Levelblue Company	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	501-1,000	874 contacts →
	Exact match “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	ALLOT	Exact match	Hod-hasharon, IsraelHQ recorded Sep 29, 2026	501-1,000	856 contacts →
	Exact match “Allot Ltd.(NASDAQ: ALLT, TASE: ALLT) is a provider of leading innovative converged cybersecurity solutions and network intelligence for service providers and enterprises…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Application Specialist Kompany ASK	Exact match	Lansing, MI, United StatesHQ recorded Sep 29, 2026	n/a	785 contacts →
	Exact match “ASK is now Convergence Networks!” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	SISA	Exact match	Bengaluru, IndiaHQ recorded Sep 29, 2026	201-500	743 contacts →
	Exact match “SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	S2grupo	Exact match	Valencia, SpainHQ recorded Sep 29, 2026	501-1,000	683 contacts →
	Exact match “We are a European company specialising in cybersecurity, cyberintelligence and cyberdefence, with more than 20 years of experience protecting critical infrastructures and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	I-Tracing	Exact match	Courbevoie, FranceHQ recorded Sep 29, 2026	1,001-5,000	639 contacts →
	Exact match “I-TRACING, pure player and cybersecurity service provider leader in France, supports over 600 clients around the world in managing their cyber risks, from anticipating threats to…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Enea AB	Exact match	Stockholm, SwedenHQ recorded Sep 29, 2026	501-1,000	638 contacts →
	Exact match “Enea is a global specialist in advanced telecom and cybersecurity software, with a vision to make the world’s communications safer and more efficient.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Everfox	Exact match	Herndon, United StatesHQ recorded Sep 29, 2026	1,001-5,000	636 contacts →
	Exact match “Everfox delivers trusted connectivity to protect the world's most critical environments, safeguarding the sensitive information behind decision advantage.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Help Ag, An E& Enterprise Company	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 29, 2026	501-1,000	634 contacts →
	Exact match “Help AG, the cybersecurity arm of e & company, provides leading enterprise businesses and governments across the Middle East with strategic consultancy combined with tailored…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Telos Corporation	Exact match	Ashburn, VA, United StatesHQ recorded Sep 29, 2026	501-1,000	629 contacts →
	Exact match “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Secunet Security Networks AG	Exact match	Essen, GermanyHQ recorded Sep 29, 2026	1,001-5,000	623 contacts →
	Exact match “secunet – We are the Guardians of Europe's Digital Freedom.” Recorded in the RevenueBase company graph · Sep 29, 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 “telecommunications cybersecurity firms”. 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 12,085 telecommunications cybersecurity firms worldwide

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Telecommunications cybersecurity firms worldwide at a glance

As of Sep 29, 2026

34.1%Verified-email coverage

18.1Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

6,429

11-50

4,130

51-200

1,068

201-500

260

501-1,000

1,001-5,000

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 telecommunications cybersecurity firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “telecommunications cybersecurity firms” 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 74,520 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 September 29, 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.

Telecommunications cybersecurity firms by location

92 lists · largest first

Every Telecommunications cybersecurity 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 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 “telecommunications cybersecurity firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many telecommunications cybersecurity firms are there worldwide?

RevenueBase identified 12,085 company matches for telecommunications cybersecurity firms worldwide as of September 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?

Palo Alto Networks tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most telecommunications cybersecurity firms?

The United States leads with 2,600 companies, followed by India (1,004) and the United Kingdom (694). Every telecommunications cybersecurity firms list by country and city is linked on this page.

Which city has the most telecommunications cybersecurity firms?

London leads with 260 company records, followed by Sao Paulo (133) and Dubai (127).

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 74,520 professional contacts with verified work emails tracked across these 12,085 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 September 29, 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.