Company lists · Data refreshed September 2026

Top 25 Security transformation consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 22,558 companies tracked

RevenueBase identified 22,558 security transformation consulting firms worldwide as of September 2026 and tracks 280,838 professional contacts across them, including 71,354 with verified work emails. The United States is the largest market and London the largest hub.

This list covers security transformation 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 29, 2026. Country and city lists for security transformation 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 29, 2026 86% judged on-target in blind review

22,558Companies

280,838Contacts tracked

71,354Verified emails

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The 25 largest security transformation consulting firms worldwide

Ranked by team size

Top 25 of 22,558 security transformation consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to security transformation 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	Private Sector	Indirect evidence	United StatesHQ checked Sep 29, 2026	n/a	12,771 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
2	Automated Systems H.K. Limited	Indirect evidence	Shatin, Hong KongHQ checked Sep 29, 2026	1,001-5,000	4,078 contacts →
	Indirect evidence “Established in 1973, ASL (HKEX: 771) accelerates the success of leading organizations by building a bridge connecting innovative technology to the business environment.” Source: RevenueBase Database · checked Sep 29, 2026
3	Securitas Seguridad España	Partial evidence	Madrid, SpainHQ checked Sep 29, 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 29, 2026
4	Sicuritalia S.P.A	Partial evidence	Milano, ItalyHQ checked Sep 29, 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 29, 2026
5	Security Industry Specialists	Partial evidence	Culver City, CA, United StatesHQ checked Sep 29, 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 29, 2026
6	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 29, 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 29, 2026
7	Forcepoint	Partial evidence	Austin, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,636 contacts →
	Partial evidence “Forcepoint simplifies security for global businesses and governments.” Source: RevenueBase Database · checked Sep 29, 2026
8	Icts Europe	Partial evidence	Bp12936, FranceHQ checked Sep 29, 2026	10001+	1,455 contacts →
	Partial evidence “ICTS Europe is Europe’s leading security specialist.” Source: RevenueBase Database · checked Sep 29, 2026
9	Nava Tech For Business	Indirect evidence	Barueri, BrazilHQ checked Sep 29, 2026	1,001-5,000	1,452 contacts →
	Indirect evidence “Atuamos no core de empresas líderes em seus segmentos, onde tecnologia, estratégia e operação se encontram.” Source: RevenueBase Database · checked Sep 29, 2026
10	Site سايت	Indirect evidence	Al Nakheel, Saudi ArabiaHQ checked Sep 29, 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 29, 2026
11	Trace3	Partial evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,345 contacts →
	Partial evidence “Trace3 delivers business transformation.” Source: RevenueBase Database · checked Sep 29, 2026
12	Thales Cybersecurity Products	Indirect evidence	Austin, TX, United StatesHQ checked Sep 29, 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 29, 2026
13	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 29, 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 29, 2026
14	Trigyn Technologies	Indirect evidence	Mumbai, IndiaHQ checked Sep 29, 2026	1,001-5,000	1,230 contacts →
	Indirect evidence “We're re-engineering the way business is done.” Source: RevenueBase Database · checked Sep 29, 2026
15	Brosnan Risk Consultants	Partial evidence	Pearl River, NY, United StatesHQ checked Sep 29, 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 29, 2026
16	Seguritech	Indirect evidence	Ciudad De Mexico, MexicoHQ checked Sep 29, 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 29, 2026
17	BCG Platinion	Partial evidence	Cologne, GermanyHQ checked Sep 29, 2026	1,001-5,000	925 contacts →
	Partial 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 29, 2026
18	Ensign Infosecurity	Indirect evidence	SingaporeHQ checked Sep 29, 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 29, 2026
19	Trustwave, A Levelblue Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	501-1,000	874 contacts →
	Indirect evidence “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: RevenueBase Database · checked Sep 29, 2026
20	FIME	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	501-1,000	848 contacts →
	Indirect evidence “We enable our clients to create and successfully launch secure solutions across payments, smart mobility, and digital identity.” Source: RevenueBase Database · checked Sep 29, 2026
21	Cyderes	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 29, 2026	1,001-5,000	844 contacts →
	Indirect evidence “Today’s threatscape is relentless.” Source: RevenueBase Database · checked Sep 29, 2026
22	Acensi	Partial evidence	Courbevoie, FranceHQ checked Sep 29, 2026	1,001-5,000	844 contacts →
	Partial evidence “You will be part of ACENSI network: 1650 co-workers involved in IS transformation projects at our clients through our multisectoral expertise.” Source: RevenueBase Database · checked Sep 29, 2026
23	Nusummit	Partial evidence	Mumbai, IndiaHQ checked Sep 29, 2026	1,001-5,000	812 contacts →
	Partial evidence “As NuSummit, we’ve solidified our position as a premier provider of cutting-edge digital transformation and cybersecurity solutions.” Source: RevenueBase Database · checked Sep 29, 2026
24	SQUAD	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	501-1,000	803 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 29, 2026
25	Securitas Norge	Partial evidence	Oslo, NorwayHQ checked Sep 29, 2026	5,001-10,000	792 contacts →
	Partial evidence “Securitas AS er det største og eldste sikkerhetsselskapet i Norge.” Source: RevenueBase Database · checked Sep 29, 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 transformation 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 security transformation consulting firms.
Partial evidence: Its own public description names part of security transformation consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name security transformation 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 22,558 security transformation consulting firms worldwide

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Security transformation consulting firms worldwide at a glance

As of Sep 29, 2026

25.4%Verified-email coverage

12.4Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

13,431

11-50

6,708

51-200

1,701

201-500

416

501-1,000

123

1,001-5,000

108

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 security transformation 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: Every country. Country and city lists for security transformation consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “security transformation 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 security transformation 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 security transformation 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, 71,354 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 29, 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 transformation consulting firms by location

153 lists · largest first

Every Security transformation 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 security transformation 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 security transformation consulting firms are there worldwide?

RevenueBase identified 22,558 security transformation 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?

Private Sector, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most security transformation consulting firms?

The United States leads with 5,391 companies, followed by the United Kingdom (1,390) and India (1,364). Every security transformation consulting firms list by country and city is linked on this page.

Which city has the most security transformation consulting firms?

London leads with 532 headquartered companies, followed by Paris (284) and Sao Paulo (255).

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 71,354 verified decision-maker contacts tracked across these 22,558 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 29, 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.