Company lists · Data refreshed September 2026

Top 25 Telecom cybersecurity providers worldwide

Name: Telecom cybersecurity providers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 11,993 companies tracked

RevenueBase identified 11,993 telecom cybersecurity providers worldwide as of September 2026 and tracks 258,138 professional contacts across them, including 82,079 with verified work emails. The United States is the largest market and London the largest hub.

This list covers telecom cybersecurity providers 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 29, 2026. Country and city lists for telecom cybersecurity providers 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 29, 2026 86% judged on-target in blind review

11,993Companies

258,138Contacts tracked

82,079Verified emails

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The 25 largest telecom cybersecurity providers worldwide

Ranked by team size

Top 25 of 11,993 telecom cybersecurity providers worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to telecom cybersecurity providers: 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 29, 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 29, 2026
2	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 29, 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 29, 2026
3	Private Sector	Indirect evidence	United StatesHQ checked Sep 29, 2026	n/a	12,771 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
4	Symantec	Partial evidence	San Jose, CA, United StatesHQ checked Sep 29, 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 29, 2026
5	Sophos	Partial evidence	Abingdon, United KingdomHQ checked Sep 29, 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 29, 2026
6	Orange Cyberdefense	Partial evidence	Nanterre, FranceHQ checked Sep 29, 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 29, 2026
7	Alcatel-Lucent Enterprise	Indirect evidence	92707 Colombes, GermanyHQ checked Sep 29, 2026	1,001-5,000	2,811 contacts →
	Indirect 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 29, 2026
8	NIL LTD	Indirect evidence	Ljubljana, SloveniaHQ checked Sep 29, 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 29, 2026
9	Barracuda	Partial evidence	Campbell, CA, United StatesHQ checked Sep 29, 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 29, 2026
10	Site سايت	Indirect evidence	Al Nakheel, Saudi ArabiaHQ checked Sep 29, 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 29, 2026
11	Sangfor Technologies	Partial evidence	Shenzhen, ChinaHQ checked Sep 29, 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 29, 2026
12	Thales Cybersecurity Products	Partial evidence	Austin, TX, United StatesHQ checked Sep 29, 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 29, 2026
13	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 29, 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 29, 2026
14	Imperva	Indirect evidence	Austin, TX, United StatesHQ checked Sep 29, 2026	10001+	1,217 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 29, 2026
15	Watchguard Technologies	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,059 contacts →
	Indirect evidence “WatchGuard® Technologies, Inc.” Source: RevenueBase Database · checked Sep 29, 2026
16	TW Telecom	Partial evidence	Broomfield, CO, United StatesHQ checked Sep 29, 2026	10001+	1,051 contacts →
	Partial evidence “tw telecom is now part of CenturyLink.” Source: RevenueBase Database · checked Sep 29, 2026
17	SALAM	Partial evidence	Riyadh, Saudi ArabiaHQ checked Sep 29, 2026	1,001-5,000	1,045 contacts →
	Partial 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 29, 2026
18	Irdeto	Partial evidence	Hoofddorp, NetherlandsHQ checked Sep 29, 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 29, 2026
19	Wavenet	Indirect evidence	Solihull, United KingdomHQ checked Sep 29, 2026	1,001-5,000	927 contacts →
	Indirect evidence “Since we’ve been helping organisations stay connected, protected and ready for what comes next.” Source: RevenueBase Database · checked Sep 29, 2026
20	Ensign Infosecurity	Partial evidence	SingaporeHQ checked Sep 29, 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 29, 2026
21	Puntonet S.A	Partial evidence	Quito, EcuadorHQ checked Sep 29, 2026	1,001-5,000	882 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 29, 2026
22	Trustwave, A Levelblue Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 29, 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 29, 2026
23	ALLOT	Partial evidence	Hod-hasharon, IsraelHQ checked Sep 29, 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 29, 2026
24	Bezeq International	Indirect evidence	Petah Tikva, IsraelHQ checked Sep 29, 2026	1,001-5,000	812 contacts →
	Indirect evidence “Technology moves fast and so do we!” Source: RevenueBase Database · checked Sep 29, 2026
25	Application Specialist Kompany ASK	Indirect evidence	Lansing, MI, United StatesHQ checked Sep 29, 2026	n/a	785 contacts →
	Indirect evidence “ASK is now Convergence Networks!” Source: RevenueBase Database · checked Sep 29, 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: telecom cybersecurity providers. 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 telecom cybersecurity providers.
Partial evidence: Its own public description names part of telecom cybersecurity providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecom cybersecurity providers. 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 11,993 telecom cybersecurity providers worldwide

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Telecom cybersecurity providers worldwide at a glance

As of Sep 29, 2026

31.8%Verified-email coverage

21.5Average contacts per company

1-10Median size (employees)

2.1%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

6,030

11-50

4,259

51-200

1,189

201-500

284

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among telecom cybersecurity providers, 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 telecom cybersecurity providers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “telecom cybersecurity providers”. 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 telecom cybersecurity providers), 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 telecom cybersecurity providers, 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, 82,079 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 29, 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.

Telecom cybersecurity providers by location

91 lists · largest first

Every Telecom cybersecurity providers 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 telecom cybersecurity providers, 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 telecom cybersecurity providers are there worldwide?

RevenueBase identified 11,993 telecom cybersecurity providers 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 telecom cybersecurity providers?

The United States leads with 2,455 companies, followed by India (954) and the United Kingdom (690). Every telecom cybersecurity providers list by country and city is linked on this page.

Which city has the most telecom cybersecurity providers?

London leads with 255 headquartered companies, followed by Dubai (138) and Sao Paulo (123).

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 82,079 verified decision-maker contacts tracked across these 11,993 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 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 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.