Company lists · Data refreshed September 2026

Top 25 Security and threat detection services worldwide

RevenueBase identified 23,424 company matches for security and threat detection services worldwide as of September 2026 and tracks 646,631 professional contacts across them, including 122,179 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for security and threat detection services 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 21, 2026. Country and city lists for security and threat detection services 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 21, 2026 How this list was built
23,424Companies
646,631Contacts tracked
122,179Verified emails
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The 25 largest security and threat detection services worldwide

Ranked by team size
Top 25 of 23,424 company matches for security and threat detection services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 21, 202610001+79,699 contacts →

Exact match

“G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchIrvine, CA, United StatesHQ recorded Sep 21, 202610001+62,804 contacts →

Exact match

“Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchMadrid, SpainHQ recorded Sep 21, 202610001+40,747 contacts →

Exact match

“50 Years of Excellence: Experience, Innovation, and Commitment to Safety.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchUnited StatesHQ recorded Sep 21, 2026n/a12,771 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchStockholm, SwedenHQ recorded Sep 21, 202610001+6,335 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchStaines, United KingdomHQ recorded Sep 21, 202610001+6,169 contacts →

Exact match

“Making the world a safer place.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchYoyogi, JapanHQ recorded Sep 21, 20265,001-10,0004,942 contacts →

Exact match

“We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchAbingdon, United KingdomHQ recorded Sep 21, 20265,001-10,0004,925 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 21, 2026 · View company records in RevenueBase
9Exact matchSunnyvale, CA, United StatesHQ recorded Sep 21, 20261,001-5,0004,722 contacts →

Exact match

“Intent-based protection for every human and every AI agent, across all data.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchIssy-les-moulineaux, FranceHQ recorded Sep 21, 202610001+3,843 contacts →

Exact match

“Securitas vous apporte son savoir‑faire et ses compétences dans la sécurisation de votre entreprise.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchNanterre, FranceHQ recorded Sep 21, 20261,001-5,0003,673 contacts →

Exact match

“Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchSan Francisco, CA, United StatesHQ recorded Sep 21, 2026n/a3,649 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchMadrid, SpainHQ recorded Sep 21, 202610001+3,620 contacts →

Exact match

“Securitas, Soluciones de Seguridad a medida Nuestro liderazgo en conocimientos de seguridad nos ha permitido desarrollar una estrategia basada en tres pilares fundamentales…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchRoswell, GA, United StatesHQ recorded Sep 21, 202610001+3,592 contacts →

Exact match

“U.S.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchMilano, ItalyHQ recorded Sep 21, 202610001+3,387 contacts →

Exact match

“Il Gruppo Sicuritalia, con oltre 18.500 dipendenti, è la più grande azienda italiana ed il secondo player privato europeo in ambito Security.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchEden Prairie, MN, United StatesHQ recorded Sep 21, 20261,001-5,0003,145 contacts →

Exact match

“Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchMountain View, CA, United StatesHQ recorded Sep 21, 20261,001-5,0003,052 contacts →

Exact match

“SentinelOne is the world's leading AI-powered cybersecurity platform.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchStockholm, SwedenHQ recorded Sep 21, 20265,001-10,0003,004 contacts →

Exact match

“Securitas is a global knowledge leader in security.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchBoston, MA, United StatesHQ recorded Sep 21, 20261,001-5,0002,822 contacts →

Exact match

“Rapid7, Inc.(NASDAQ: RPD) is a global leader in AI-powered managed cybersecurity operations, trusted to advance organizations’ cyber resilience.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchSão Paulo, BrazilHQ recorded Sep 21, 202610001+2,772 contacts →

Exact match

“Fundado em 1992, o GRUPO GR se consolidou no mercado por sua qualidade e seriedade na implantação e operação de soluções de segurança e serviços para diversos tipos de clientes.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 21, 20261,001-5,0002,722 contacts →

Exact match

“As a global leader in threat detection and screening technologies, every minute of every day Smiths Detection's technologies and people make the world a safer place.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchMiami, FL, United StatesHQ recorded Sep 21, 20261,001-5,0002,715 contacts →

Exact match

“Varonis unifies AI-native data security, AI security and governance, and behavior-based threat detection.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchAurora, IL, United StatesHQ recorded Sep 21, 20265,001-10,0002,266 contacts →

Exact match

“Andy Frain Services.America's leading provider of integrated solutions to security and events needs for over 90 years.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchLeawood, KS, United StatesHQ recorded Sep 21, 20261,001-5,0002,222 contacts →

Exact match

“Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchBucuresti, RomaniaHQ recorded Sep 21, 20261,001-5,0002,172 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 21, 2026 · View company records in RevenueBase

Showing 25 of 23,424 security and threat detection services worldwide

See the full list, filter by size, metro and specialty, and access 122,179 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Security and threat detection services worldwide at a glance

As of Sep 21, 2026
18.9%Verified-email coverage
27.6Average contacts per company
11-50Median size (employees)
1.7%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
10,762
11-50
7,859
51-200
2,875
201-500
885
501-1,000
391
1,001-5,000
384
5,001-10,000
67
10001+
92

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 security and threat detection services are linked below.
What qualifies
Company records worldwide whose business descriptions match “security and threat detection services” 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 122,179 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 21, 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.

Security and threat detection services by location

115 lists · largest first

Every Security and threat detection services 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 “security and threat detection services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many security and threat detection services are there worldwide?

RevenueBase identified 23,424 company matches for security and threat detection services 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?

G4s tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most security and threat detection services?

The United States leads with 5,215 companies, followed by India (1,637) and the United Kingdom (1,360). Every security and threat detection services list by country and city is linked on this page.

Which city has the most security and threat detection services?

London leads with 407 company records, followed by Sao Paulo (239) and Dubai (190).

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 122,179 professional contacts with verified work emails tracked across these 23,424 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 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 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.