Company lists · Data refreshed September 2026

Top 25 Critical infrastructure protection companies worldwide

Name: Critical infrastructure protection companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 9,105 companies tracked

RevenueBase identified 9,105 critical infrastructure protection companies worldwide as of September 2026 and tracks 185,333 professional contacts across them, including 39,549 with verified work emails. The United States is the largest market and London the largest hub.

This list covers critical infrastructure protection 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 19, 2026. Country and city lists for critical infrastructure protection 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 19, 2026 86% judged on-target in blind review

9,105Companies

185,333Contacts tracked

39,549Verified emails

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The 25 largest critical infrastructure protection companies worldwide

Ranked by team size

Top 25 of 9,105 critical infrastructure protection companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to critical infrastructure protection 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	Securitas Group	Indirect evidence	Stockholm, SwedenHQ checked Sep 19, 2026	10001+	6,335 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
2	Securitas Seguridad España	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	10001+	3,620 contacts →
	Indirect evidence “Securitas, Soluciones de Seguridad a medida Nuestro liderazgo en conocimientos de seguridad nos ha permitido desarrollar una estrategia basada en tres pilares fundamentales…” Source: RevenueBase Database · checked Sep 19, 2026
3	Sicuritalia S.P.A	Indirect evidence	Milano, ItalyHQ checked Sep 19, 2026	10001+	3,387 contacts →
	Indirect evidence “Il Gruppo Sicuritalia, con oltre 18.500 dipendenti, è la più grande azienda italiana ed il secondo player privato europeo in ambito Security.” Source: RevenueBase Database · checked Sep 19, 2026
4	Securitas Sverige AB	Indirect evidence	Stockholm, SwedenHQ checked Sep 19, 2026	5,001-10,000	3,004 contacts →
	Indirect evidence “Securitas is a global knowledge leader in security.” Source: RevenueBase Database · checked Sep 19, 2026
5	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 19, 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 19, 2026
6	Crisis24	Partial evidence	Annapolis, MD, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,025 contacts →
	Partial evidence “Crisis24, a GardaWorld company, is widely regarded as the leading integrated risk management, crisis response, consulting, and global protective solutions firm, serving the…” Source: RevenueBase Database · checked Sep 19, 2026
7	Pinkerton Comprehensive Risk Management	Indirect evidence	Ann Arbor, MI, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,022 contacts →
	Indirect evidence “Pinkerton, established in 1850 by Allan Pinkerton, stands as a leading global provider of security and risk management solutions.” Source: RevenueBase Database · checked Sep 19, 2026
8	Paragon Systems INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 19, 2026	10001+	1,949 contacts →
	Indirect evidence “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Source: RevenueBase Database · checked Sep 19, 2026
9	Wilson Security	Indirect evidence	Essendon Fields, AustraliaHQ checked Sep 19, 2026	5,001-10,000	1,813 contacts →
	Indirect evidence “At Wilson Security, we are committed to building a safer future for everyone.” Source: RevenueBase Database · checked Sep 19, 2026
10	Securiguard Middle East LLC	Indirect evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 19, 2026	10001+	1,541 contacts →
	Indirect evidence “Welcome to Securiguard Middle East, Your answer for an Integrated Safety and Security Solutions in the UAE At Securiguard Middle East, we are driven by a commitment to make a…” Source: RevenueBase Database · checked Sep 19, 2026
11	Icts Europe	Indirect evidence	Bp12936, FranceHQ checked Sep 19, 2026	10001+	1,455 contacts →
	Indirect evidence “ICTS Europe is Europe’s leading security specialist.” Source: RevenueBase Database · checked Sep 19, 2026
12	Frazer-Nash Consultancy	Indirect evidence	Leatherhead, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,437 contacts →
	Indirect evidence “With offices in the UK and Australia, Frazer-Nash is a leading systems, engineering and technology company.” Source: RevenueBase Database · checked Sep 19, 2026
13	Airbus Protect	Indirect evidence	Blagnac, FranceHQ checked Sep 19, 2026	1,001-5,000	1,431 contacts →
	Indirect evidence “Airbus Protect is an Airbus subsidiary bringing together expertise in cybersecurity, safety and sustainability-related services.” Source: RevenueBase Database · checked Sep 19, 2026
14	Site سايت	Indirect evidence	Al Nakheel, Saudi ArabiaHQ checked Sep 19, 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 19, 2026
15	Comando G8	Indirect evidence	São Paulo, BrazilHQ checked Sep 19, 2026	5,001-10,000	1,361 contacts →
	Indirect evidence “O Grupo Comando G8 é referência nacional na implantação e operação de soluções integradas em segurança e serviços.” Source: RevenueBase Database · checked Sep 19, 2026
16	Imvula Quality Protection	Partial evidence	Woodmead, South AfricaHQ checked Sep 19, 2026	10001+	1,340 contacts →
	Partial evidence “At Imvula Quality Protection, we don’t just provide security, we create peace of mind.” Source: RevenueBase Database · checked Sep 19, 2026
17	Grupo Atlas DE Seguridad Integral	Indirect evidence	Cali, ColombiaHQ checked Sep 19, 2026	10001+	1,328 contacts →
	Indirect evidence “Somos una empresa de seguridad integral, incorporando la tecnología y la innovación como herramientas para asegurar la sostenibilidad de las organizaciones, con un equipo humano…” Source: RevenueBase Database · checked Sep 19, 2026
18	Guidepoint Security	Indirect evidence	Reston, VA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,232 contacts →
	Indirect evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 19, 2026
19	IEM	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 19, 2026	501-1,000	1,175 contacts →
	Indirect evidence “IEM is a professional services firm dedicated to building a safe, secure, and resilient world.” Source: RevenueBase Database · checked Sep 19, 2026
20	Brosnan Risk Consultants	Indirect evidence	Pearl River, NY, United StatesHQ checked Sep 19, 2026	5,001-10,000	1,050 contacts →
	Indirect evidence “Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Source: RevenueBase Database · checked Sep 19, 2026
21	Seguritech	Indirect evidence	Ciudad De Mexico, MexicoHQ checked Sep 19, 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 19, 2026
22	Seris Belgium	Indirect evidence	Diegem, BelgiumHQ checked Sep 19, 2026	1,001-5,000	1,014 contacts →
	Indirect evidence “SERIS Security is a modern company that offers companies, governments and private customers a Total Security-solution through a creative and pioneering philosophy.” Source: RevenueBase Database · checked Sep 19, 2026
23	Onet Sécurité	Indirect evidence	Marseille, FranceHQ checked Sep 19, 2026	10001+	1,007 contacts →
	Indirect evidence “La proposition de valeur d'Onet dans la sécurité se fonde sur - son expertise sécurité et sa capacité à analyser les besoins et risques propres à ses clients- sa parfaite maîtrise…” Source: RevenueBase Database · checked Sep 19, 2026
24	Securitas Germany	Indirect evidence	Berlin, GermanyHQ checked Sep 19, 2026	10001+	994 contacts →
	Indirect evidence “Securitas is a global knowledge leader in security.” Source: RevenueBase Database · checked Sep 19, 2026
25	Securitas Perú	Indirect evidence	Magdalena Del Mar, PeruHQ checked Sep 19, 2026	1,001-5,000	891 contacts →
	Indirect evidence “Securitas es socio líder en soluciones de protección inteligente.” Source: RevenueBase Database · checked Sep 19, 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: critical infrastructure protection 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 critical infrastructure protection companies.
Partial evidence: Its own public description names part of critical infrastructure protection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name critical infrastructure protection 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 9,105 critical infrastructure protection companies worldwide

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Critical infrastructure protection companies worldwide at a glance

As of Sep 19, 2026

21.3%Verified-email coverage

20.4Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

4,420

11-50

2,999

51-200

1,018

201-500

315

501-1,000

128

1,001-5,000

146

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 critical infrastructure protection 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 critical infrastructure protection companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “critical infrastructure protection 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 critical infrastructure protection 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 critical infrastructure protection 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, 39,549 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 19, 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.

Critical infrastructure protection companies by location

54 lists · largest first

Every Critical infrastructure protection companies 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 critical infrastructure protection 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 critical infrastructure protection companies are there worldwide?

RevenueBase identified 9,105 critical infrastructure protection 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?

Securitas Group, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most critical infrastructure protection companies?

The United States leads with 2,184 companies, followed by the United Kingdom (462) and India (453). Every critical infrastructure protection companies list by country and city is linked on this page.

Which city has the most critical infrastructure protection companies?

London leads with 179 headquartered companies, followed by Sao Paulo (123) and Dubai (89).

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 39,549 verified decision-maker contacts tracked across these 9,105 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 19, 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.