Company lists · Data refreshed September 2026
Top 25 IT security consultants worldwide
RevenueBase identified 20,768 IT security consultants worldwide as of September 2026 and tracks 214,757 professional contacts across them, including 61,864 with verified work emails. The United States is the largest market and London the largest hub.
This list covers IT security consultants 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 IT security consultants 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.
The 25 largest IT security consultants worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 3,673 contacts → | ||||
Indirect evidence “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 844 contacts → | ||||
Indirect evidence “Today’s threatscape is relentless.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 803 contacts → | ||||
Partial 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 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 763 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 705 contacts → | ||||
Strong evidence “Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 639 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 636 contacts → | ||||
Indirect evidence “Everfox delivers trusted connectivity to protect the world's most critical environments, safeguarding the sensitive information behind decision advantage.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 634 contacts → | ||||
Partial evidence “Help AG, the cybersecurity arm of e & company, provides leading enterprise businesses and governments across the Middle East with strategic consultancy combined with tailored…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 629 contacts → | ||||
Partial evidence “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 619 contacts → | ||||
Indirect evidence “Omegapoint hjälper dig att utveckla och cybersäkra din digitala verksamhet.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 525 contacts → | ||||
Indirect evidence “Protection is Paramount!” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 523 contacts → | ||||
Partial evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 506 contacts → | ||||
Indirect evidence “Founded in 2008, OWN is a Pure Player in cybersecurity, with offices in Paris, Rennes and Toulouse, but with a presence throughout France with its fully remote employees.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 502 contacts → | ||||
Partial evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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: IT security consultants. 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 IT security consultants.
- Partial evidence
- Its own public description names part of IT security consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name IT security consultants. 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 20,768 IT security consultants worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 61,864 reachable decision-makers.
Free signup · no credit card
IT security consultants worldwide at a glance
As of Sep 21, 2026Companies by employee count
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 IT security consultants, 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 IT security consultants are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “IT security consultants”. 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 IT security consultants), 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 IT security consultants, 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, 61,864 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.
IT security consultants by location
116 lists · largest firstEvery IT security consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- IT security consultants based in the United States4,909
- IT security consultants based in India1,447
- IT security consultants based in the United Kingdom1,375
- IT security consultants based in France744
- IT security consultants based in Australia689
- IT security consultants based in Germany680
- IT security consultants based in Canada671
- IT security consultants based in Brazil604
- IT security consultants based in the Netherlands401
- IT security consultants based in Italy308
- IT security consultants based in the United Arab Emirates308
- IT security consultants based in Spain306
- IT security consultants based in Mexico266
- IT security consultants based in Türkiye222
- IT security consultants based in Switzerland218
- IT security consultants based in South Africa209
- IT security consultants based in Belgium185
- IT security consultants based in Sweden182
- IT security consultants based in Israel177
- IT security consultants based in Poland153
- IT security consultants based in Colombia146
- IT security consultants based in Pakistan145
- IT security consultants based in Chile135
- IT security consultants based in Saudi Arabia125
- IT security consultants based in Argentina123
- IT security consultants based in Indonesia118
- IT security consultants based in Singapore112
- IT security consultants based in Nigeria110
- IT security consultants based in Denmark89
- IT security consultants based in Austria88
- IT security consultants based in New Zealand87
- IT security consultants based in Romania78
- IT security consultants based in Malaysia77
- IT security consultants based in Kenya68
- IT security consultants based in Morocco65
- IT security consultants based in Portugal64
- IT security consultants based in Egypt63
- IT security consultants based in Ireland63
- IT security consultants based in Finland59
- IT security consultants based in Peru58
- IT security consultants based in Greece54
- IT security consultants based in Hungary54
- IT security consultants based in Ecuador51
- IT security consultants based in the Philippines43
- IT security consultants based in Norway40
- IT security consultants based in Thailand40
- IT security consultants based in Ukraine39
- IT security consultants based in Bulgaria35
- IT security consultants based in Qatar35
- IT security consultants based in Japan34
- IT security consultants based in Luxembourg34
- IT security consultants based in Slovakia32
- IT security consultants based in Hong Kong31
- IT security consultants based in Cyprus30
- IT security consultants based in Estonia30
- IT security consultants based in Tunisia30
- IT security consultants based in Jordan29
- IT security consultants based in the Dominican Republic26
Cities
- IT security consultants based in London, United Kingdom508
- IT security consultants based in Sao Paulo, Brazil214
- IT security consultants based in Toronto, Canada150
- IT security consultants based in Sydney, Australia145
- IT security consultants based in Melbourne, Australia139
- IT security consultants based in New York, United States136
- IT security consultants based in Hyderabad, India114
- IT security consultants based in Pune, India103
- IT security consultants based in Bangalore, India102
- IT security consultants based in Washington, United States94
- IT security consultants based in Atlanta, United States93
- IT security consultants based in Houston, United States89
- IT security consultants based in Mumbai, India88
- IT security consultants based in New Delhi, India88
- IT security consultants based in Austin, United States83
- IT security consultants based in Chennai, India80
- IT security consultants based in Dallas, United States80
- IT security consultants based in Bengaluru, India72
- IT security consultants based in Chicago, United States71
- IT security consultants based in Miami, United States71
- IT security consultants based in Montreal, Canada69
- IT security consultants based in Ahmedabad, India63
- IT security consultants based in Noida, India63
- IT security consultants based in Ottawa, Canada60
- IT security consultants based in San Francisco, United States59
- IT security consultants based in Tampa, United States59
- IT security consultants based in Calgary, Canada57
- IT security consultants based in Brisbane, Australia54
- IT security consultants based in Los Angeles, United States51
- IT security consultants based in Manchester, United Kingdom49
- IT security consultants based in Denver, United States48
- IT security consultants based in Arlington, United States47
- IT security consultants based in San Diego, United States46
- IT security consultants based in Charlotte, United States45
- IT security consultants based in Vancouver, Canada43
- IT security consultants based in Rio De Janeiro, Brazil42
- IT security consultants based in Boston, United States41
- IT security consultants based in Canberra, Australia39
- IT security consultants based in Columbia, United States37
- IT security consultants based in Gurgaon, India37
- IT security consultants based in Mclean, United States35
- IT security consultants based in Alexandria, United States34
- IT security consultants based in Orlando, United States34
- IT security consultants based in San Antonio, United States34
- IT security consultants based in Delhi, India33
- IT security consultants based in Phoenix, United States33
- IT security consultants based in Reston, United States33
- IT security consultants based in Seattle, United States33
- IT security consultants based in Raleigh, United States32
- IT security consultants based in Las Vegas, United States31
- IT security consultants based in Ashburn, United States30
- IT security consultants based in Gurugram, India30
- IT security consultants based in Baltimore, United States29
- IT security consultants based in Belo Horizonte, Brazil29
- IT security consultants based in Birmingham, United Kingdom27
- IT security consultants based in Columbus, United States26
- IT security consultants based in Fairfax, United States25
- IT security consultants based in Minneapolis, United States25
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 IT security consultants, 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 IT security consultants are there worldwide?
RevenueBase identified 20,768 IT security consultants 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 IT security consultants?
The United States leads with 4,909 companies, followed by India (1,447) and the United Kingdom (1,375). Every IT security consultants list by country and city is linked on this page.
Which city has the most IT security consultants?
London leads with 515 headquartered companies, followed by Sao Paulo (214) and Paris (213).
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 61,864 verified decision-maker contacts tracked across these 20,768 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.
Ready to reach these companies? Verified emails and direct dials for all 20,768 IT security consultants worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
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.