Company lists · Data refreshed September 2026

Top 25 Information security consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 29,040 companies tracked

RevenueBase identified 29,040 information security consulting firms worldwide as of September 2026 and tracks 335,087 professional contacts across them, including 99,750 with verified work emails and 41,897 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers information security consulting firms 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 3, 2026. Country and city lists for information security consulting firms 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 3, 2026 86% judged on-target in blind review

29,040Companies

335,087Contacts tracked

99,750Verified emails

41,897Mobile numbers

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The 25 largest information security consulting firms worldwide

Ranked by team size

Top 25 of 29,040 information security consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to information security consulting firms: 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	Sophos	Indirect evidence	Abingdon, United KingdomHQ checked Sep 3, 2026	5,001-10,000	4,963 contacts →
	Indirect evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Sep 3, 2026
2	Orange Cyberdefense	Indirect evidence	Nanterre, FranceHQ checked Sep 3, 2026	1,001-5,000	3,706 contacts →
	Indirect evidence “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Source: RevenueBase Database · checked Sep 3, 2026
3	Securitas Seguridad España	Partial evidence	Madrid, SpainHQ checked Sep 3, 2026	10001+	3,616 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 3, 2026
4	Sicuritalia S.P.A	Partial evidence	Milano, ItalyHQ checked Sep 3, 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 3, 2026
5	NRI Group	Indirect evidence	Chiyoda-ku, JapanHQ checked Sep 3, 2026	10001+	2,979 contacts →
	Indirect evidence “We align our goals with our clients’ goals – a true partnership that ensures shared success.” Source: RevenueBase Database · checked Sep 3, 2026
6	OPTIV	Indirect evidence	Leawood, VA, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,206 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 3, 2026
7	Nava Tech For Business	Indirect evidence	Barueri, BrazilHQ checked Sep 3, 2026	1,001-5,000	1,468 contacts →
	Indirect evidence “Atuamos no core de empresas líderes em seus segmentos, onde tecnologia, estratégia e operação se encontram.” Source: RevenueBase Database · checked Sep 3, 2026
8	Airbus Protect	Indirect evidence	Blagnac, FranceHQ checked Sep 3, 2026	1,001-5,000	1,429 contacts →
	Indirect evidence “Airbus Protect is an Airbus subsidiary bringing together expertise in cybersecurity, safety and sustainability-related services.” Source: RevenueBase Database · checked Sep 3, 2026
9	Site سايت	Indirect evidence	Al Nakheel, Saudi ArabiaHQ checked Sep 3, 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 3, 2026
10	First Security Group LLC	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 3, 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 3, 2026
11	Trace3	Indirect evidence	Irvine, AZ, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,336 contacts →
	Indirect evidence “Trace3 delivers business transformation.” Source: RevenueBase Database · checked Sep 3, 2026
12	Thales Cybersecurity Products	Indirect evidence	Austin, TX, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,252 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 3, 2026
13	Guidepoint Security	Partial evidence	Reston, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,234 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 3, 2026
14	Brosnan Risk Consultants	Partial evidence	Pearl River, CA, United StatesHQ checked Sep 3, 2026	5,001-10,000	1,047 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 3, 2026
15	Seguritech	Indirect evidence	Ciudad De Mexico, MexicoHQ checked Sep 3, 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 3, 2026
16	PPC	Indirect evidence	Trevose, PA, United StatesHQ checked Sep 3, 2026	201-500	981 contacts →
	Indirect evidence “PPC is now part of DSA” Source: RevenueBase Database · checked Sep 3, 2026
17	Coalfire	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 3, 2026	1,001-5,000	960 contacts →
	Indirect evidence “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: RevenueBase Database · checked Sep 3, 2026
18	BCG Platinion	Indirect evidence	Cologne, GermanyHQ checked Sep 3, 2026	1,001-5,000	928 contacts →
	Indirect evidence “At BCG Platinion, we leverage our expertise alongside the unique experiences of our teams to accelerate digital transformations for our clients.” Source: RevenueBase Database · checked Sep 3, 2026
19	Ensign Infosecurity	Indirect evidence	SingaporeHQ checked Sep 3, 2026	501-1,000	888 contacts →
	Indirect evidence “Ensign InfoSecurity is the largest pure-play end-to-end cybersecurity service provider in Asia.” Source: RevenueBase Database · checked Sep 3, 2026
20	Cyderes	Indirect evidence	Kansas City, AB, United StatesHQ checked Sep 3, 2026	1,001-5,000	842 contacts →
	Indirect evidence “Today’s threatscape is relentless.” Source: RevenueBase Database · checked Sep 3, 2026
21	Buchanan Technologies	Partial evidence	Grapevine, KS, United StatesHQ checked Sep 3, 2026	501-1,000	817 contacts →
	Partial evidence “As a leading IT consulting and outsourcing services firm, Buchanan Technologies helps organizations across North America turn their business technology into a powerful competitive…” Source: RevenueBase Database · checked Sep 3, 2026
22	SQUAD	Indirect evidence	Paris, FranceHQ checked Sep 3, 2026	501-1,000	804 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 3, 2026
23	Softcell Technologies Global Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 3, 2026	501-1,000	763 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 3, 2026
24	MTI	Partial evidence	Staines-upon-thames, United KingdomHQ checked Sep 3, 2026	201-500	762 contacts →
	Partial evidence “MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.” Source: RevenueBase Database · checked Sep 3, 2026
25	SISA	Partial evidence	Bengaluru, IndiaHQ checked Sep 3, 2026	201-500	743 contacts →
	Partial evidence “SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…” Source: RevenueBase Database · checked Sep 3, 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: information security consulting firms. 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 information security consulting firms.
Partial evidence: Its own public description names part of information security consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name information security consulting firms. 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 29,040 information security consulting firms worldwide

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Information security consulting firms worldwide at a glance

As of Sep 3, 2026

29.8%Verified-email coverage

12.5%Mobile-number coverage

11.5Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · London

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

16,996

11-50

8,968

51-200

2,229

201-500

459

501-1,000

130

1,001-5,000

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 information security consulting firms, 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: 74 countries, largest first: the United States, India, the United Kingdom, Brazil, France, Germany, Canada, Australia, the Netherlands, Spain and 64 more. Country and city lists for information security consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “information security consulting firms”. 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 information security consulting firms), 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 information security consulting firms, 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, 99,750 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 3, 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.

Information security consulting firms by location

205 lists · largest first

Every Information security consulting firms 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 information security consulting firms, 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 information security consulting firms are there worldwide?

RevenueBase identified 29,040 information security consulting firms 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?

Sophos, headquartered in Abingdon, tops this list with the largest team on record.

Which country has the most information security consulting firms?

The United States leads with 8,547 companies, followed by India (2,345) and the United Kingdom (2,008). Every information security consulting firms list by country and city is linked on this page.

Which city has the most information security consulting firms?

London leads with 767 headquartered companies, followed by Sao Paulo (399) and Paris (342).

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 99,750 verified decision-maker contacts tracked across these 29,040 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 3, 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.