Company lists · Data refreshed September 2026
Top 25 Information security consultancy services worldwide
RevenueBase identified 32,017 information security consultancy services worldwide as of September 2026 and tracks 312,884 professional contacts across them, including 83,832 with verified work emails. The United States is the largest market and London the largest hub.
This list covers information security consultancy services 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 information security consultancy services 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 consultancy services 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 | 6,982 contacts → | ||||
Indirect evidence “Elm is the leading provider of innovative secure services & solutions to both public and private sectors in Saudi Arabia.” 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 | 1,668 contacts → | ||||
Strong evidence “mc2i is an independent consultancy in Information System.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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. | |||||
| 7 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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. | |||||
| 9 | 1,037 contacts → | ||||
Indirect evidence “Synoptek is a leading global managed services provider and technology consulting firm that delivers transformative business results.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1,007 contacts → | ||||
Indirect evidence “La proposition de valeur d'Onet dans la sécurité se fonde sur - son expertise sécurité et sa capacité à analyser les besoins et risques propres à ses clients- sa parfaite maîtrise…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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. | |||||
| 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 → | ||||
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 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 771 contacts → | ||||
Strong evidence “Since 2006, PSU has been the leading Scandinavian risk and security consultancy in China.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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. | |||||
| 17 | 742 contacts → | ||||
Indirect evidence “A consulting firm providing technology solutions and advisory services to both private and public sector organizations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 706 contacts → | ||||
Partial evidence “Netrix Global is an engineering-led IT consultant and managed service provider with over three decades of experience.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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. | |||||
| 20 | 660 contacts → | ||||
Indirect evidence “With more than 30 years of experience partnering with global enterprises on complex business and IT initiatives, SDG is a trusted provider of advisory, transformation, and managed…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 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. | |||||
| 22 | 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. | |||||
| 23 | 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. | |||||
| 24 | 628 contacts → | ||||
Indirect evidence “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 623 contacts → | ||||
Indirect evidence “secunet – We are the Guardians of Europe's Digital Freedom.” 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: information security consultancy services. 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 consultancy services.
- Partial evidence
- Its own public description names part of information security consultancy services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name information security consultancy services. 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 32,017 information security consultancy services worldwide
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Information security consultancy services 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 information security consultancy services, 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 consultancy services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “information security consultancy services”. 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 consultancy services), 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 consultancy services, 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, 83,832 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.
Information security consultancy services by location
150 lists · largest firstEvery Information security consultancy services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Information security consultancy services based in the United States6,156
- Information security consultancy services based in the United Kingdom2,419
- Information security consultancy services based in India1,957
- Information security consultancy services based in Germany1,363
- Information security consultancy services based in France1,290
- Information security consultancy services based in Brazil1,213
- Information security consultancy services based in Australia970
- Information security consultancy services based in Canada917
- Information security consultancy services based in the Netherlands765
- Information security consultancy services based in Italy632
- Information security consultancy services based in Spain615
- Information security consultancy services based in the United Arab Emirates442
- Information security consultancy services based in Mexico411
- Information security consultancy services based in Switzerland367
- Information security consultancy services based in Türkiye367
- Information security consultancy services based in Belgium337
- Information security consultancy services based in South Africa330
- Information security consultancy services based in Poland292
- Information security consultancy services based in Sweden289
- Information security consultancy services based in Colombia238
- Information security consultancy services based in Israel220
- Information security consultancy services based in Chile215
- Information security consultancy services based in Argentina203
- Information security consultancy services based in Pakistan201
- Information security consultancy services based in Nigeria190
- Information security consultancy services based in Indonesia171
- Information security consultancy services based in Singapore169
- Information security consultancy services based in Denmark168
- Information security consultancy services based in Austria158
- Information security consultancy services based in Saudi Arabia155
- Information security consultancy services based in Kenya143
- Information security consultancy services based in New Zealand135
- Information security consultancy services based in Malaysia126
- Information security consultancy services based in Portugal123
- Information security consultancy services based in Romania123
- Information security consultancy services based in Ireland119
- Information security consultancy services based in Morocco110
- Information security consultancy services based in Peru110
- Information security consultancy services based in Egypt87
- Information security consultancy services based in Greece85
- Information security consultancy services based in Norway84
- Information security consultancy services based in Ecuador83
- Information security consultancy services based in Bangladesh82
- Information security consultancy services based in Hungary82
- Information security consultancy services based in Finland81
- Information security consultancy services based in Japan74
- Information security consultancy services based in Russia67
- Information security consultancy services based in the Philippines65
- Information security consultancy services based in Thailand60
- Information security consultancy services based in Ukraine59
- Information security consultancy services based in Luxembourg56
- Information security consultancy services based in Tunisia55
- Information security consultancy services based in Bulgaria54
- Information security consultancy services based in Qatar53
- Information security consultancy services based in Sri Lanka50
- Information security consultancy services based in Croatia49
- Information security consultancy services based in Hong Kong49
- Information security consultancy services based in Estonia48
- Information security consultancy services based in Cyprus47
- Information security consultancy services based in Slovakia44
- Information security consultancy services based in Jordan38
- Information security consultancy services based in Lebanon37
- Information security consultancy services based in the Dominican Republic33
- Information security consultancy services based in Panama29
- Information security consultancy services based in Uruguay27
- Information security consultancy services based in Serbia26
Cities
- Information security consultancy services based in London, United Kingdom821
- Information security consultancy services based in Sao Paulo, Brazil375
- Information security consultancy services based in Sydney, Australia208
- Information security consultancy services based in Toronto, Canada197
- Information security consultancy services based in New York, United States191
- Information security consultancy services based in Melbourne, Australia181
- Information security consultancy services based in Mumbai, India146
- Information security consultancy services based in Hyderabad, India135
- Information security consultancy services based in Pune, India133
- Information security consultancy services based in Houston, United States132
- Information security consultancy services based in Bangalore, India130
- Information security consultancy services based in Washington, United States117
- Information security consultancy services based in New Delhi, India114
- Information security consultancy services based in Atlanta, United States113
- Information security consultancy services based in Berlin, Germany102
- Information security consultancy services based in Austin, United States101
- Information security consultancy services based in Dallas, United States101
- Information security consultancy services based in Chennai, India100
- Information security consultancy services based in Noida, India100
- Information security consultancy services based in Montreal, Canada94
- Information security consultancy services based in Bengaluru, India90
- Information security consultancy services based in Chicago, United States90
- Information security consultancy services based in Rio De Janeiro, Brazil89
- Information security consultancy services based in San Francisco, United States87
- Information security consultancy services based in Calgary, Canada81
- Information security consultancy services based in Miami, United States79
- Information security consultancy services based in Ottawa, Canada77
- Information security consultancy services based in Los Angeles, United States74
- Information security consultancy services based in Tampa, United States73
- Information security consultancy services based in Brisbane, Australia70
- Information security consultancy services based in Manchester, United Kingdom68
- Information security consultancy services based in Ahmedabad, India67
- Information security consultancy services based in San Diego, United States61
- Information security consultancy services based in Canberra, Australia58
- Information security consultancy services based in Delhi, India58
- Information security consultancy services based in Boston, United States56
- Information security consultancy services based in Roma, Italy55
- Information security consultancy services based in Denver, United States53
- Information security consultancy services based in Seattle, United States53
- Information security consultancy services based in Arlington, United States51
- Information security consultancy services based in Vancouver, Canada50
- Information security consultancy services based in Perth, Australia49
- Information security consultancy services based in Belo Horizonte, Brazil48
- Information security consultancy services based in Charlotte, United States47
- Information security consultancy services based in Curitiba, Brazil47
- Information security consultancy services based in Gurgaon, India47
- Information security consultancy services based in Hamburg, Germany47
- Information security consultancy services based in Phoenix, United States45
- Information security consultancy services based in Brasilia, Brazil44
- Information security consultancy services based in San Antonio, United States44
- Information security consultancy services based in Alexandria, United States43
- Information security consultancy services based in Mississauga, Canada43
- Information security consultancy services based in Rome, Italy42
- Information security consultancy services based in Jaipur, India41
- Information security consultancy services based in Birmingham, United Kingdom40
- Information security consultancy services based in Gurugram, India40
- Information security consultancy services based in Las Vegas, United States38
- Information security consultancy services based in Orlando, United States37
- Information security consultancy services based in Milano, Italy36
- Information security consultancy services based in Columbia, United States35
- Information security consultancy services based in Porto Alegre, Brazil35
- Information security consultancy services based in Adelaide, Australia34
- Information security consultancy services based in Munich, Germany34
- Information security consultancy services based in Raleigh, United States34
- Information security consultancy services based in Leeds, United Kingdom33
- Information security consultancy services based in Monterrey, Mexico33
- Information security consultancy services based in Reston, United States33
- Information security consultancy services based in Minneapolis, United States32
- Information security consultancy services based in Plano, United States30
- Information security consultancy services based in Portland, United States30
- Information security consultancy services based in Columbus, United States28
- Information security consultancy services based in Nashville, United States28
- Information security consultancy services based in Navi Mumbai, India28
- Information security consultancy services based in Milan, Italy27
- Information security consultancy services based in Scottsdale, United States27
- Information security consultancy services based in Cambridge, United Kingdom26
- Information security consultancy services based in Cheltenham, United Kingdom26
- Information security consultancy services based in Huntsville, United States26
- Information security consultancy services based in Richmond, United States26
- Information security consultancy services based in San Jose, United States26
- Information security consultancy services based in Fairfax, United States25
- Information security consultancy services based in Philadelphia, United States25
- Information security consultancy services based in Pittsburgh, United States25
- Information security consultancy services based in Reading, United Kingdom25
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 consultancy services, 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 consultancy services are there worldwide?
RevenueBase identified 32,017 information security consultancy services 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 consultancy services?
The United States leads with 6,156 companies, followed by the United Kingdom (2,419) and India (1,957). Every information security consultancy services list by country and city is linked on this page.
Which city has the most information security consultancy services?
London leads with 831 headquartered companies, followed by Sao Paulo (375) and Paris (333).
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 83,832 verified decision-maker contacts tracked across these 32,017 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.