Company lists · Data refreshed September 2026

Top 25 Cyber consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 44,024 companies tracked

RevenueBase identified 44,024 cyber consulting firms worldwide as of September 2026 and tracks 482,513 professional contacts across them, including 137,847 with verified work emails. The United States is the largest market and London the largest hub.

This list covers cyber 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 21, 2026. Country and city lists for cyber 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 21, 2026 86% judged on-target in blind review

44,024Companies

482,513Contacts tracked

137,847Verified emails

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The 25 largest cyber consulting firms worldwide

Ranked by team size

Top 25 of 44,024 cyber consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cyber 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 21, 2026	n/a	12,771 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
2	Protiviti	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 21, 2026	5,001-10,000	8,779 contacts →
	Partial evidence “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: RevenueBase Database · checked Sep 21, 2026
3	Sophos	Indirect evidence	Abingdon, United KingdomHQ checked Sep 21, 2026	5,001-10,000	4,925 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 21, 2026
4	Orange Cyberdefense	Indirect evidence	Nanterre, FranceHQ checked Sep 21, 2026	1,001-5,000	3,673 contacts →
	Indirect evidence “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Source: RevenueBase Database · checked Sep 21, 2026
5	NRI Group	Indirect evidence	Chiyoda-ku, JapanHQ checked Sep 21, 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 21, 2026
6	OPTIV	Partial evidence	Leawood, KS, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,222 contacts →
	Partial 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 21, 2026
7	Inspira Enterprise	Indirect evidence	Mumbai, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,773 contacts →
	Indirect evidence “Inspira Enterprise is a global Cybersecurity & Data Analytics & AI services provider with a presence in North America, ASEAN, Middle East, India, and Africa regions.” Source: RevenueBase Database · checked Sep 21, 2026
8	Nava Tech For Business	Indirect evidence	Barueri, BrazilHQ checked Sep 21, 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 21, 2026
9	Airbus Protect	Indirect evidence	Blagnac, FranceHQ checked Sep 21, 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 21, 2026
10	Site سايت	Indirect evidence	Al Nakheel, Saudi ArabiaHQ checked Sep 21, 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 21, 2026
11	Trace3	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,345 contacts →
	Indirect evidence “Trace3 delivers business transformation.” Source: RevenueBase Database · checked Sep 21, 2026
12	Thales Cybersecurity Products	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 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 21, 2026
13	Guidepoint Security	Indirect evidence	Reston, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,232 contacts →
	Indirect evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 21, 2026
14	V-Soft Consulting Group, INC	Partial evidence	Louisville, KY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,221 contacts →
	Partial evidence “V-Soft Consulting, an innovative corporation specializing in Information Technology consulting; including staffing, digital, and infrastructure solutions.” Source: RevenueBase Database · checked Sep 21, 2026
15	Imperva	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	10001+	1,217 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 21, 2026
16	Accenture Greece	Indirect evidence	Kifisia, GreeceHQ checked Sep 21, 2026	1,001-5,000	1,171 contacts →
	Indirect evidence “Η Accenture είναι ηγέτιδα εταιρεία παροχής συμβουλευτικών υπηρεσιών σε παγκόσμιο επίπεδο, δημιουργώντας απτή αξία με ταχύτητα και σε μεγάλη κλίμακα.” Source: RevenueBase Database · checked Sep 21, 2026
17	Centric Consulting	Partial evidence	Dayton, OH, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,113 contacts →
	Partial evidence “Committed to delivering tailored solutions and unmatched experiences, Centric Consulting is an international business and technology consulting firm that combines the benefits of…” Source: RevenueBase Database · checked Sep 21, 2026
18	Synoptek	Partial evidence	Costa Mesa, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,037 contacts →
	Partial evidence “Synoptek is a leading global managed services provider and technology consulting firm that delivers transformative business results.” Source: RevenueBase Database · checked Sep 21, 2026
19	Irdeto	Indirect evidence	Hoofddorp, NetherlandsHQ checked Sep 21, 2026	1,001-5,000	1,026 contacts →
	Indirect evidence “Irdeto, a CANAL+ company, is the world leader in digital platform cybersecurity, empowering businesses to innovate for a secure, connected future.” Source: RevenueBase Database · checked Sep 21, 2026
20	PPC	Indirect evidence	Trevose, PA, United StatesHQ checked Sep 21, 2026	201-500	979 contacts →
	Indirect evidence “PPC is now part of DSA” Source: RevenueBase Database · checked Sep 21, 2026
21	Coalfire	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	947 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 21, 2026
22	The MIL Corporation	Partial evidence	Bowie, MD, United StatesHQ checked Sep 21, 2026	501-1,000	941 contacts →
	Partial evidence “Established in 1980, MIL provides innovative cyber, engineering, financial, and information technology services to the federal government.” Source: RevenueBase Database · checked Sep 21, 2026
23	BCG Platinion	Indirect evidence	Cologne, GermanyHQ checked Sep 21, 2026	1,001-5,000	925 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 21, 2026
24	Ensign Infosecurity	Indirect evidence	SingaporeHQ checked Sep 21, 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 21, 2026
25	Trustwave, A Levelblue Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	501-1,000	874 contacts →
	Partial 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 21, 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: cyber 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 cyber consulting firms.
Partial evidence: Its own public description names part of cyber consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cyber 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 44,024 cyber consulting firms worldwide

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Cyber consulting firms worldwide at a glance

As of Sep 21, 2026

28.6%Verified-email coverage

11.0Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

26,788

11-50

13,054

51-200

3,123

201-500

633

501-1,000

166

1,001-5,000

125

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 cyber 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 cyber consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “cyber 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 cyber 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 cyber 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, 137,847 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 21, 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.

Cyber consulting firms by location

204 lists · largest first

Every Cyber 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 cyber 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 cyber consulting firms are there worldwide?

RevenueBase identified 44,024 cyber 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 cyber consulting firms?

The United States leads with 12,301 companies, followed by India (2,888) and the United Kingdom (2,332). Every cyber consulting firms list by country and city is linked on this page.

Which city has the most cyber consulting firms?

London leads with 880 headquartered companies, followed by Sao Paulo (475) and Paris (431).

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 137,847 verified decision-maker contacts tracked across these 44,024 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 21, 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.