Company lists · Data refreshed November 2026

Top 25 IT security consulting services worldwide

Name: IT security consulting services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 46,822 companies tracked

RevenueBase identified 46,822 company matches for IT security consulting services worldwide as of November 2026 and tracks 501,350 professional contacts across them, including 139,732 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for IT security consulting 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 November 5, 2026. Country and city lists for IT security consulting 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 Nov 5, 2026 How this list was built

46,822Companies

501,350Contacts tracked

139,732Verified emails

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The 25 largest IT security consulting services worldwide

Ranked by team size

Top 25 of 46,822 company matches for IT security consulting services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Private Sector	Exact match	United StatesHQ recorded Nov 5, 2026	n/a	13,149 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	ELM Company	Exact match	Riyadh, Saudi ArabiaHQ recorded Nov 5, 2026	1,001-5,000	7,577 contacts →
	Exact match “Elm is the leading provider of innovative secure services & solutions to both public and private sectors in Saudi Arabia.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	Orange Cyberdefense	Exact match	Nanterre, FranceHQ recorded Nov 5, 2026	1,001-5,000	3,977 contacts →
	Exact match “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	Sicuritalia S.P.A	Exact match	Milan, ItalyHQ recorded Nov 5, 2026	10001+	3,593 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 · Nov 5, 2026 · View company records in RevenueBase
5	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,171 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 · Nov 5, 2026 · View company records in RevenueBase
6	Eplus INC	Exact match	Herndon, VA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,901 contacts →
	Exact match “ePlus is a customer-first, services-led, results-driven and trusted industry leader that helps organizations secure, modernize, optimize, and scale every aspect of their IT…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Nava Tech For Business	Exact match	Barueri, BrazilHQ recorded Nov 5, 2026	1,001-5,000	1,588 contacts →
	Exact match “Atuamos no core de empresas líderes em seus segmentos, onde tecnologia, estratégia e operação se encontram.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Airbus Protect	Exact match	Blagnac, FranceHQ recorded Nov 5, 2026	1,001-5,000	1,515 contacts →
	Exact match “Airbus Protect is an Airbus subsidiary bringing together expertise in cybersecurity, safety and sustainability-related services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Site سايت	Exact match	Al Nakheel, Saudi ArabiaHQ recorded Nov 5, 2026	501-1,000	1,514 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	First Security Group LLC	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 5, 2026	5,001-10,000	1,465 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	Trace3	Exact match	Irvine, MI, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,431 contacts →
	Exact match “Trace3 delivers business transformation.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Thales Cybersecurity Products	Exact match	Austin, TX, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,413 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Sangfor Technologies	Exact match	Shenzhen, ChinaHQ recorded Nov 5, 2026	5,001-10,000	1,403 contacts →
	Exact match “Sangfor Technologies is a global leader in cybersecurity, cloud computing, and IT infrastructure, providing fully integrated and AI-driven solutions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,346 contacts →
	Exact match “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Imperva	Exact match	Austin, TX, United StatesHQ recorded Nov 5, 2026	10001+	1,192 contacts →
	Exact match “On Dec.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Centric Consulting	Exact match	Dayton, OH, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,159 contacts →
	Exact match “Committed to delivering tailored solutions and unmatched experiences, Centric Consulting is an international business and technology consulting firm that combines the benefits of…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Seguritech	Exact match	Mexico City, MexicoHQ recorded Nov 5, 2026	1,001-5,000	1,159 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	Onet Sécurité	Exact match	Marseille, FranceHQ recorded Nov 5, 2026	10001+	1,142 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Irdeto	Exact match	Hoofddorp, MN, NetherlandsHQ recorded Nov 5, 2026	1,001-5,000	1,091 contacts →
	Exact match “Irdeto, a CANAL+ company, is the world leader in digital platform cybersecurity, empowering businesses to innovate for a secure, connected future.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Brosnan Risk Consultants	Exact match	Pearl River, CA, United StatesHQ recorded Nov 5, 2026	5,001-10,000	1,080 contacts →
	Exact match “Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Synoptek	Exact match	Costa Mesa, CA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,062 contacts →
	Exact match “Synoptek is a leading global managed services provider and technology consulting firm that delivers transformative business results.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	PPC	Exact match	Trevose, PA, United StatesHQ recorded Nov 5, 2026	201-500	1,017 contacts →
	Exact match “PPC is now part of DSA” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Ensign Infosecurity	Exact match	Kuala, SingaporeHQ recorded Nov 5, 2026	501-1,000	989 contacts →
	Exact match “Ensign InfoSecurity is the largest pure-play end-to-end cybersecurity service provider in Asia.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Coalfire	Exact match	Chicago, GA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	977 contacts →
	Exact match “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	Cyderes	Exact match	Kansas City, MO, United StatesHQ recorded Nov 5, 2026	1,001-5,000	909 contacts →
	Exact match “Cyderes is a global managed cybersecurity services partner dedicated to defending against today’s relentless threatscape.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “IT security consulting services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 46,822 IT security consulting services worldwide

See the full list, filter by size, metro and specialty, and access 139,732 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT security consulting services worldwide at a glance

As of Nov 5, 2026

27.9%Verified-email coverage

10.7Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · London

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

28,507

11-50

13,816

51-200

3,217

201-500

646

501-1,000

183

1,001-5,000

149

5,001-10,000

10001+

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 IT security consulting services are linked below.
What qualifies: Company records worldwide whose business descriptions match “IT security consulting 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 139,732 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 November 5, 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.

IT security consulting services by location

271 lists · largest first

Every IT security consulting 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 “IT security consulting services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT security consulting services are there worldwide?

RevenueBase identified 46,822 company matches for IT security consulting services worldwide as of November 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?

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

Which country has the most IT security consulting services?

The United States leads with 11,505 companies, followed by India (3,195) and the United Kingdom (2,567). Every IT security consulting services list by country and city is linked on this page.

Which city has the most IT security consulting services?

London leads with 922 company records, followed by Sao Paulo (512) and Dubai (406).

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 139,732 professional contacts with verified work emails tracked across these 46,822 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 November 5, 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.