Company lists · Data refreshed September 2026
Top 25 Information security consultant companies worldwide
RevenueBase identified 23,335 information security consultant companies worldwide as of September 2026 and tracks 247,747 professional contacts across them, including 69,714 with verified work emails. The United States is the largest market and London the largest hub.
This list covers information security consultant companies 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 28, 2026. Country and city lists for information security consultant companies 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 information security consultant companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 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 28, 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 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 888 contacts → | ||||
Indirect evidence “Ensign InfoSecurity is the largest pure-play end-to-end cybersecurity service provider in Asia.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 844 contacts → | ||||
Indirect evidence “Today’s threatscape is relentless.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 641 contacts → | ||||
Partial evidence “At Network Intelligence, we combine our team of 500+ security professionals with Transilience – our cutting-edge AI platform.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 636 contacts → | ||||
Partial 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 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 628 contacts → | ||||
Indirect evidence “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 623 contacts → | ||||
Indirect evidence “secunet – We are the Guardians of Europe's Digital Freedom.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 619 contacts → | ||||
Indirect evidence “Omegapoint hjälper dig att utveckla och cybersäkra din digitala verksamhet.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 525 contacts → | ||||
Indirect evidence “Protection is Paramount!” Source: RevenueBase Database · checked Sep 28, 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 28, 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 28, 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: information security consultant companies. 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 consultant companies.
- Partial evidence
- Its own public description names part of information security consultant companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name information security consultant companies. 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 23,335 information security consultant companies worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 69,714 reachable decision-makers.
Free signup · no credit card
Information security consultant companies worldwide at a glance
As of Sep 28, 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 information security consultant companies, 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 information security consultant companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “information security consultant companies”. 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 consultant companies), 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 consultant companies, 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, 69,714 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 28, 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 consultant companies by location
158 lists · largest firstEvery Information security consultant companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Information security consultant companies based in the United States5,470
- Information security consultant companies based in India1,589
- Information security consultant companies based in the United Kingdom1,459
- Information security consultant companies based in France831
- Information security consultant companies based in Germany822
- Information security consultant companies based in Brazil814
- Information security consultant companies based in Canada749
- Information security consultant companies based in Australia713
- Information security consultant companies based in the Netherlands483
- Information security consultant companies based in Spain379
- Information security consultant companies based in Italy352
- Information security consultant companies based in the United Arab Emirates328
- Information security consultant companies based in Mexico307
- Information security consultant companies based in Türkiye245
- Information security consultant companies based in Switzerland244
- Information security consultant companies based in South Africa233
- Information security consultant companies based in Belgium210
- Information security consultant companies based in Sweden203
- Information security consultant companies based in Israel193
- Information security consultant companies based in Colombia175
- Information security consultant companies based in Poland174
- Information security consultant companies based in Chile161
- Information security consultant companies based in Pakistan149
- Information security consultant companies based in Argentina144
- Information security consultant companies based in Saudi Arabia143
- Information security consultant companies based in Indonesia129
- Information security consultant companies based in Nigeria128
- Information security consultant companies based in Singapore116
- Information security consultant companies based in Austria103
- Information security consultant companies based in New Zealand93
- Information security consultant companies based in Denmark87
- Information security consultant companies based in Romania86
- Information security consultant companies based in Malaysia82
- Information security consultant companies based in Kenya79
- Information security consultant companies based in Portugal74
- Information security consultant companies based in Peru73
- Information security consultant companies based in Ireland72
- Information security consultant companies based in Morocco71
- Information security consultant companies based in Ecuador66
- Information security consultant companies based in Egypt65
- Information security consultant companies based in Finland64
- Information security consultant companies based in Hungary63
- Information security consultant companies based in Greece60
- Information security consultant companies based in Russia51
- Information security consultant companies based in the Philippines48
- Information security consultant companies based in Ukraine47
- Information security consultant companies based in Norway46
- Information security consultant companies based in Japan42
- Information security consultant companies based in Thailand42
- Information security consultant companies based in Qatar41
- Information security consultant companies based in Sri Lanka41
- Information security consultant companies based in Estonia38
- Information security consultant companies based in Bulgaria37
- Information security consultant companies based in Cyprus34
- Information security consultant companies based in Hong Kong34
- Information security consultant companies based in Slovakia34
- Information security consultant companies based in Croatia32
- Information security consultant companies based in Jordan31
- Information security consultant companies based in Luxembourg31
- Information security consultant companies based in Tunisia31
- Information security consultant companies based in the Dominican Republic28
Cities
- Information security consultant companies based in London, United Kingdom552
- Information security consultant companies based in Sao Paulo, Brazil266
- Information security consultant companies based in Paris, France238
- Information security consultant companies based in Dubai, United Arab Emirates194
- Information security consultant companies based in Toronto, Canada174
- Information security consultant companies based in Sydney, Australia159
- Information security consultant companies based in New York, United States154
- Information security consultant companies based in Melbourne, Australia144
- Information security consultant companies based in Hyderabad, India122
- Information security consultant companies based in Pune, India116
- Information security consultant companies based in Mumbai, India114
- Information security consultant companies based in Bangalore, India109
- Information security consultant companies based in Washington, United States108
- Information security consultant companies based in Houston, United States107
- Information security consultant companies based in Atlanta, United States102
- Information security consultant companies based in Singapore, Singapore101
- Information security consultant companies based in Istanbul, Türkiye99
- Information security consultant companies based in Madrid, Spain98
- Information security consultant companies based in New Delhi, India92
- Information security consultant companies based in Riyadh, Saudi Arabia92
- Information security consultant companies based in Stockholm, Sweden92
- Information security consultant companies based in Austin, United States88
- Information security consultant companies based in Chennai, India85
- Information security consultant companies based in Dallas, United States85
- Information security consultant companies based in Chicago, United States81
- Information security consultant companies based in Bengaluru, India80
- Information security consultant companies based in Noida, India80
- Information security consultant companies based in Miami, United States77
- Information security consultant companies based in Montreal, Canada76
- Information security consultant companies based in Tampa, United States76
- Information security consultant companies based in San Francisco, United States74
- Information security consultant companies based in Nairobi, Kenya68
- Information security consultant companies based in Ahmedabad, India67
- Information security consultant companies based in Johannesburg, South Africa67
- Information security consultant companies based in Berlin, Germany64
- Information security consultant companies based in Ottawa, Canada64
- Information security consultant companies based in Calgary, Canada61
- Information security consultant companies based in Los Angeles, United States60
- Information security consultant companies based in Bogota, Colombia57
- Information security consultant companies based in Rio De Janeiro, Brazil57
- Information security consultant companies based in San Diego, United States55
- Information security consultant companies based in Barcelona, Spain54
- Information security consultant companies based in Brisbane, Australia54
- Information security consultant companies based in Santiago, Chile53
- Information security consultant companies based in Vancouver, Canada50
- Information security consultant companies based in Warszawa, Poland50
- Information security consultant companies based in Charlotte, United States48
- Information security consultant companies based in Denver, United States48
- Information security consultant companies based in Manchester, United Kingdom48
- Information security consultant companies based in Seattle, United States48
- Information security consultant companies based in Tel Aviv, Israel48
- Information security consultant companies based in Arlington, United States47
- Information security consultant companies based in Boston, United States46
- Information security consultant companies based in Canberra, Australia45
- Information security consultant companies based in Alexandria, United States42
- Information security consultant companies based in Gurgaon, India42
- Information security consultant companies based in Phoenix, United States42
- Information security consultant companies based in Zurich, Switzerland42
- Information security consultant companies based in Amsterdam, Netherlands41
- Information security consultant companies based in Belo Horizonte, Brazil39
- Information security consultant companies based in Lima, Peru39
- Information security consultant companies based in San Antonio, United States39
- Information security consultant companies based in Delhi, India37
- Information security consultant companies based in Bucharest, Romania36
- Information security consultant companies based in Orlando, United States36
- Information security consultant companies based in Raleigh, United States36
- Information security consultant companies based in Reston, United States36
- Information security consultant companies based in Brasilia, Brazil35
- Information security consultant companies based in Cairo, Egypt35
- Information security consultant companies based in Gurugram, India35
- Information security consultant companies based in Columbia, United States34
- Information security consultant companies based in Auckland, New Zealand33
- Information security consultant companies based in Cape Town, South Africa33
- Information security consultant companies based in Jakarta, Indonesia33
- Information security consultant companies based in Quito, Ecuador33
- Information security consultant companies based in Las Vegas, United States32
- Information security consultant companies based in Baltimore, United States31
- Information security consultant companies based in Fairfax, United States30
- Information security consultant companies based in Wellington, New Zealand30
- Information security consultant companies based in Ashburn, United States29
- Information security consultant companies based in Lyon, France29
- Information security consultant companies based in Mclean, United States29
- Information security consultant companies based in Minneapolis, United States29
- Information security consultant companies based in Portland, United States29
- Information security consultant companies based in Wien, Austria29
- Information security consultant companies based in Birmingham, United Kingdom28
- Information security consultant companies based in Columbus, United States28
- Information security consultant companies based in Munich, Germany28
- Information security consultant companies based in Roma, Italy28
- Information security consultant companies based in Tallinn, Estonia28
- Information security consultant companies based in Hamburg, Germany27
- Information security consultant companies based in Rome, Italy27
- Information security consultant companies based in Curitiba, Brazil26
- Information security consultant companies based in Bangkok, Thailand25
- Information security consultant companies based in Kuala Lumpur, Malaysia25
- Information security consultant companies based in Plano, United States25
- Information security consultant companies based in Wilmington, 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 information security consultant companies, 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 consultant companies are there worldwide?
RevenueBase identified 23,335 information security consultant companies 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 information security consultant companies?
The United States leads with 5,470 companies, followed by India (1,589) and the United Kingdom (1,459). Every information security consultant companies list by country and city is linked on this page.
Which city has the most information security consultant companies?
London leads with 560 headquartered companies, followed by Sao Paulo (266) and Paris (238).
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 69,714 verified decision-maker contacts tracked across these 23,335 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 28, 2026.
Ready to reach these companies? Verified emails and direct dials for all 23,335 information security consultant companies 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.