Company lists · Data refreshed November 2026

Top 25 Information security consultants worldwide

RevenueBase identified 24,527 company matches for information security consultants worldwide as of November 2026 and tracks 273,051 professional contacts across them, including 72,838 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for information security consultants 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 information security consultants 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
24,527Companies
273,051Contacts tracked
72,838Verified emails
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The 25 largest information security consultants worldwide

Ranked by team size
Top 25 of 24,527 company matches for information security consultants 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchUnited StatesHQ recorded Nov 5, 2026n/a13,149 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchMilan, ItalyHQ recorded Nov 5, 202610001+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
3Exact matchChiyoda-ku, NY, JapanHQ recorded Nov 5, 202610001+3,248 contacts →

Exact match

“We align our goals with our clients’ goals – a true partnership that ensures shared success.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchLeawood, KS, United StatesHQ recorded Nov 5, 20261,001-5,0002,171 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
5Exact matchBlagnac, FranceHQ recorded Nov 5, 20261,001-5,0001,515 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
6Exact matchAl Nakheel, Saudi ArabiaHQ recorded Nov 5, 2026501-1,0001,514 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
7Exact matchDubai, United Arab EmiratesHQ recorded Nov 5, 20265,001-10,0001,465 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
8Exact matchIrvine, MI, United StatesHQ recorded Nov 5, 20261,001-5,0001,431 contacts →

Exact match

“Trace3 delivers business transformation.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchReston, VA, United StatesHQ recorded Nov 5, 20261,001-5,0001,346 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
10Exact matchMarseille, FranceHQ recorded Nov 5, 202610001+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
11Exact matchPearl River, CA, United StatesHQ recorded Nov 5, 20265,001-10,0001,080 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
12Exact matchKuala, SingaporeHQ recorded Nov 5, 2026501-1,000989 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
13Exact matchKansas City, MO, United StatesHQ recorded Nov 5, 20261,001-5,000909 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
14Exact matchDallas, TX, United StatesHQ recorded Nov 5, 20261,001-5,000829 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchParis, FranceHQ recorded Nov 5, 2026501-1,000827 contacts →

Exact match

“The growing threat of cyber risks, the expansion of cloud computing and the emergence of the DevOps movement are reshaping IT practices, enlighting the relevance of our vision for…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchBeijing, ChinaHQ recorded Nov 5, 2026n/a823 contacts →

Exact match

“Since 2006, PSU has been the leading Scandinavian risk and security consultancy in China.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Nov 5, 2026n/a782 contacts →

Exact match

“Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchBangalore, IndiaHQ recorded Nov 5, 20261,001-5,000755 contacts →

Exact match

“SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchMumbai, IndiaHQ recorded Nov 5, 2026501-1,000733 contacts →

Exact match

“With 35 years of experience, Softcell Technologies Global is a trusted IT services provider specialising in (i) IT security and cybersecurity solutions,(ii) cloud / on-premise…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchNorwalk, United StatesHQ recorded Nov 5, 2026201-500715 contacts →

Exact match

“With more than 30 years of experience partnering with global enterprises on complex business and IT initiatives, SDG is a trusted provider of advisory, transformation, and managed…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21Exact matchCourbevoie, FranceHQ recorded Nov 5, 20261,001-5,000687 contacts →

Exact match

“I-TRACING, pure player and cybersecurity service provider leader in France, supports over 600 clients around the world in managing their cyber risks, from anticipating threats to…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchEssen, GermanyHQ recorded Nov 5, 20261,001-5,000680 contacts →

Exact match

“secunet – We are the Guardians of Europe's Digital Freedom.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchLagos, NigeriaHQ recorded Nov 5, 2026501-1,000677 contacts →

Exact match

“Halogen Group formerly known as Halogen Security Company Limited is the leading Security Solutions Provider in West Africa.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24Exact matchAshburn, VA, United StatesHQ recorded Nov 5, 2026501-1,000676 contacts →

Exact match

“Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25Exact matchDubai, United Arab EmiratesHQ recorded Nov 5, 2026501-1,000671 contacts →

Exact match

“Help AG, the cybersecurity arm of e & company, provides leading enterprise businesses and governments across the Middle East with strategic consultancy combined with tailored…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 25 of 24,527 information security consultants worldwide

See the full list, filter by size, metro and specialty, and access 72,838 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Information security consultants worldwide at a glance

As of Nov 5, 2026
26.7%Verified-email coverage
11.1Average contacts per company
1-10Median size (employees)
2.4%Largest-city concentration · London
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
15,002
11-50
7,145
51-200
1,697
201-500
365
501-1,000
102
1,001-5,000
95
5,001-10,000
17
10001+
18

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 information security consultants are linked below.
What qualifies
Company records worldwide whose business descriptions match “information security consultants” 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 72,838 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.

Information security consultants by location

174 lists · largest first

Every Information security consultants 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 “information security consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many information security consultants are there worldwide?

RevenueBase identified 24,527 company matches for information security consultants 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 information security consultants?

The United States leads with 5,557 companies, followed by the United Kingdom (1,597) and India (1,496). Every information security consultants list by country and city is linked on this page.

Which city has the most information security consultants?

London leads with 594 company records, followed by Sao Paulo (294) and Paris (248).

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 72,838 professional contacts with verified work emails tracked across these 24,527 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.