Company lists · Data refreshed September 2026

Top 25 Security software telecom companies worldwide

Name: Security software telecom companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 4,310 companies tracked

RevenueBase identified 4,310 security software telecom companies worldwide as of September 2026 and tracks 144,746 professional contacts across them, including 50,847 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers security software telecom 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 security software telecom 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

4,310Companies

144,746Contacts tracked

50,847Verified emails

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The 25 largest security software telecom companies worldwide

Ranked by team size

Top 25 of 4,310 security software telecom companies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to security software telecom 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	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 21, 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 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	Trend Micro	Indirect evidence	Yoyogi, JapanHQ checked Sep 21, 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 Sep 21, 2026
5	Sophos	Indirect evidence	Abingdon, United KingdomHQ checked Sep 21, 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 Sep 21, 2026
6	Mcafee	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,868 contacts →
	Indirect evidence “We’re creating what’s next in online protection.” Source: RevenueBase Database · checked Sep 21, 2026
7	F-Secure Corporation	Partial evidence	Helsinki, FinlandHQ checked Sep 21, 2026	n/a	4,766 contacts →
	Partial 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
8	Orange Cyberdefense	Indirect evidence	Nanterre, FranceHQ checked Sep 21, 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 Sep 21, 2026
9	Alcatel-Lucent Enterprise	Indirect evidence	92707 Colombes, GermanyHQ checked Sep 21, 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 21, 2026
10	Bitdefender	Indirect evidence	Bucuresti, RomaniaHQ checked Sep 21, 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 Sep 21, 2026
11	Digicert	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,767 contacts →
	Indirect evidence “As the leading provider of digital trust, DigiCert solutions help you engage online with confidence, knowing your data and connections are secure.” Source: RevenueBase Database · checked Sep 21, 2026
12	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
13	Forcepoint	Partial evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,636 contacts →
	Partial evidence “Forcepoint simplifies security for global businesses and governments.” Source: RevenueBase Database · checked Sep 21, 2026
14	Quick Heal	Partial evidence	Pune, IndiaHQ checked Sep 21, 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 Sep 21, 2026
15	Imperva	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	10001+	1,217 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 21, 2026
16	Irdeto	Indirect evidence	Hoofddorp, NetherlandsHQ checked Sep 21, 2026	1,001-5,000	1,026 contacts →
	Indirect 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 21, 2026
17	ALLOT	Indirect evidence	Hod-hasharon, IsraelHQ checked Sep 21, 2026	501-1,000	856 contacts →
	Indirect 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 21, 2026
18	SISA	Partial evidence	Bengaluru, IndiaHQ checked Sep 21, 2026	201-500	743 contacts →
	Partial evidence “SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…” Source: RevenueBase Database · checked Sep 21, 2026
19	ME	Partial evidence	United StatesHQ checked Sep 21, 2026	1,001-5,000	707 contacts →
	Partial evidence “We are now officially Skyhigh Security!” Source: RevenueBase Database · checked Sep 21, 2026
20	Positive Technologies	Indirect evidence	United StatesHQ checked Sep 21, 2026	1,001-5,000	686 contacts →
	Indirect evidence “Positive Technologies is a leading developer of products, solutions and services for results-driven cybersecurity that enable detection and prevention of attacks before they cause…” Source: RevenueBase Database · checked Sep 21, 2026
21	Enea AB	Strong evidence	Stockholm, SwedenHQ checked Sep 21, 2026	501-1,000	638 contacts →
	Strong evidence “Enea is a global specialist in advanced telecom and cybersecurity software, with a vision to make the world’s communications safer and more efficient.” Source: RevenueBase Database · checked Sep 21, 2026
22	Secunet Security Networks AG	Indirect evidence	Essen, GermanyHQ checked Sep 21, 2026	1,001-5,000	623 contacts →
	Indirect evidence “secunet – We are the Guardians of Europe's Digital Freedom.” Source: RevenueBase Database · checked Sep 21, 2026
23	Malwarebytes	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 21, 2026	501-1,000	604 contacts →
	Partial evidence “Malwarebytes is reimagining security to safeguard devices, data, and people, no matter their location, lifestyle or means.” Source: RevenueBase Database · checked Sep 21, 2026
24	SSH Communications Security	Indirect evidence	Helsinki, FinlandHQ checked Sep 21, 2026	51-200	593 contacts →
	Indirect evidence “We are a European cybersecurity company that helps businesses secure critical data and communications between systems, automated applications, and people with defensive…” Source: RevenueBase Database · checked Sep 21, 2026
25	Advens	Indirect evidence	Paris, ItalyHQ checked Sep 21, 2026	501-1,000	586 contacts →
	Indirect evidence “Advens is a European, independent and outstanding leader in cybersecurity.” 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: security software telecom 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 security software telecom companies.
Partial evidence: Its own public description names part of security software telecom companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name security software telecom 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 4,310 security software telecom companies worldwide

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Security software telecom companies worldwide at a glance

As of Sep 21, 2026

35.1%Verified-email coverage

33.6Average contacts per company

11-50Median size (employees)

1.5%Largest-city concentration · Sao Paulo

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

1,843

11-50

1,602

51-200

537

201-500

160

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 security software telecom 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 security software telecom companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “security software telecom 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 security software telecom 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 security software telecom 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, 50,847 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.

Security software telecom companies by location

27 lists · largest first

Every Security software telecom companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 security software telecom 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 security software telecom companies are there worldwide?

RevenueBase identified 4,310 security software telecom 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 security software telecom companies?

The United States leads with 643 companies, followed by India (344) and Brazil (284). Every security software telecom companies list by country and city is linked on this page.

Which city has the most security software telecom companies?

Sao Paulo leads with 64 headquartered companies, followed by London (60) and Dubai (51).

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 50,847 verified decision-maker contacts tracked across these 4,310 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.