Company lists · Data refreshed September 2026

Top 25 Security consulting companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 15,904 companies tracked

RevenueBase identified 15,904 security consulting companies worldwide as of September 2026 and tracks 240,390 professional contacts across them, including 50,852 with verified work emails and 30,379 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers security consulting 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 6, 2026. Country and city lists for security consulting 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 6, 2026 86% judged on-target in blind review

15,904Companies

240,390Contacts tracked

50,852Verified emails

30,379Mobile numbers

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The 25 largest security consulting companies worldwide

Ranked by team size

Top 25 of 15,904 security consulting companies worldwide, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to security consulting 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	Convergint	Indirect evidence	Hoffman Estates, IL, United StatesHQ checked Sep 6, 2026	10001+	5,707 contacts →
	Indirect evidence “Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.” Source: RevenueBase Database · checked Sep 6, 2026
2	Securitas Seguridad España	Partial evidence	Madrid, SpainHQ checked Sep 6, 2026	10001+	3,620 contacts →
	Partial 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 6, 2026
3	U.S. Security Associates, INC	Indirect evidence	Roswell, GA, United StatesHQ checked Sep 6, 2026	10001+	3,592 contacts →
	Indirect evidence “U.S.” Source: RevenueBase Database · checked Sep 6, 2026
4	Sicuritalia S.P.A	Partial evidence	Milano, ItalyHQ checked Sep 6, 2026	10001+	3,387 contacts →
	Partial 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 6, 2026
5	Grupo GR	Indirect evidence	São Paulo, BrazilHQ checked Sep 6, 2026	10001+	2,772 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 6, 2026
6	Security Industry Specialists	Partial evidence	Culver City, CA, United StatesHQ checked Sep 6, 2026	5,001-10,000	2,500 contacts →
	Partial evidence “The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Source: RevenueBase Database · checked Sep 6, 2026
7	Paragon Security	Partial evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	1,001-5,000	2,365 contacts →
	Partial evidence “Founded in 1976, Paragon Security is Ontario’s largest privately owned security company.” Source: RevenueBase Database · checked Sep 6, 2026
8	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 6, 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 6, 2026
9	Paragon Systems INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	10001+	1,949 contacts →
	Partial 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 6, 2026
10	Airbus Protect	Indirect evidence	Blagnac, FranceHQ checked Sep 6, 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 6, 2026
11	Securitas Belgium	Indirect evidence	Diegem, BelgiumHQ checked Sep 6, 2026	5,001-10,000	1,419 contacts →
	Indirect evidence “See a different world.” Source: RevenueBase Database · checked Sep 6, 2026
12	World Security	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 6, 2026	1,001-5,000	1,398 contacts →
	Partial evidence “World Security being a Semi Govt Organization provides specialist turnkey security solutions to the local market and beyond, as well as the Dubai World Group.” Source: RevenueBase Database · checked Sep 6, 2026
13	Site سايت	Indirect evidence	Al Nakheel, Saudi ArabiaHQ checked Sep 6, 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 6, 2026
14	Guardsmark	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	10001+	1,375 contacts →
	Partial evidence “Guardsmark, LLC provides security services.” Source: RevenueBase Database · checked Sep 6, 2026
15	First Security Group LLC	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 6, 2026	5,001-10,000	1,374 contacts →
	Partial evidence “First Security Group LLC was founded in 2004 with the vision of His Highness, the Vice President, Prime Minister, and Ruler of Dubai, Sheikh Mohamed bin Rashid Al Maktoum.” Source: RevenueBase Database · checked Sep 6, 2026
16	Comando G8	Indirect evidence	São Paulo, BrazilHQ checked Sep 6, 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 6, 2026
17	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 6, 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 6, 2026
18	Titan Security Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,138 contacts →
	Partial evidence “At Titan Security Group, we understand that each client is unique, with specific security needs shaped by the type of property and its location.” Source: RevenueBase Database · checked Sep 6, 2026
19	Andrews International	Partial evidence	Burbank, CA, United StatesHQ checked Sep 6, 2026	10001+	1,081 contacts →
	Partial evidence “Twenty-five years ago Andrews International (AI) began forming a network of the world’s foremost security authorities and connecting with strategic partners for operations…” Source: RevenueBase Database · checked Sep 6, 2026
20	St. Moritz Security Services, INC	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 6, 2026	5,001-10,000	1,062 contacts →
	Indirect evidence “Founded in 1982, St.” Source: RevenueBase Database · checked Sep 6, 2026
21	Brosnan Risk Consultants	Partial evidence	Pearl River, NY, United StatesHQ checked Sep 6, 2026	5,001-10,000	1,050 contacts →
	Partial 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 6, 2026
22	Seguritech	Indirect evidence	Ciudad De Mexico, MexicoHQ checked Sep 6, 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 6, 2026
23	Onet Sécurité	Indirect evidence	Marseille, FranceHQ checked Sep 6, 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 6, 2026
24	Securitas Perú	Partial evidence	Magdalena Del Mar, PeruHQ checked Sep 6, 2026	1,001-5,000	891 contacts →
	Partial evidence “Securitas es socio líder en soluciones de protección inteligente.” Source: RevenueBase Database · checked Sep 6, 2026
25	Securitas Norge	Partial evidence	Oslo, NorwayHQ checked Sep 6, 2026	5,001-10,000	792 contacts →
	Partial evidence “Securitas AS er det største og eldste sikkerhetsselskapet i Norge.” Source: RevenueBase Database · checked Sep 6, 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 consulting 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 consulting companies.
Partial evidence: Its own public description names part of security consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name security consulting 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 15,904 security consulting companies worldwide

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Security consulting companies worldwide at a glance

As of Sep 6, 2026

21.2%Verified-email coverage

12.6%Mobile-number coverage

15.1Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · London

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

8,632

11-50

4,774

51-200

1,527

201-500

476

501-1,000

195

1,001-5,000

195

5,001-10,000

10001+

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 consulting 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: 53 countries, largest first: the United States, India, the United Kingdom, Brazil, France, Germany, Canada, Australia, the Netherlands, Mexico and 43 more. Country and city lists for security consulting companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “security consulting 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 consulting 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 consulting 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, 50,852 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 between September 6, 2026 and September 14, 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 consulting companies by location

129 lists · largest first

Every Security consulting 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 security consulting 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 consulting companies are there worldwide?

RevenueBase identified 15,904 security consulting 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?

Convergint, headquartered in Hoffman Estates, tops this list with the largest team on record.

Which country has the most security consulting companies?

The United States leads with 4,584 companies, followed by India (1,249) and the United Kingdom (1,226). Every security consulting companies list by country and city is linked on this page.

Which city has the most security consulting companies?

London leads with 450 headquartered companies, followed by Sao Paulo (232) and Paris (186).

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 50,852 verified decision-maker contacts tracked across these 15,904 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled from the company graph between September 6, 2026 and September 14, 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.