Company lists · Data refreshed September 2026
Top 25 Information security service providers worldwide
RevenueBase identified 34,825 information security service providers worldwide as of September 2026 and tracks 503,805 professional contacts across them, including 160,329 with verified work emails. The United States is the largest market and London the largest hub.
This list covers information security service providers 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 service providers 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 service providers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 18,431 contacts → | ||||
Indirect evidence “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 14,289 contacts → | ||||
Indirect evidence “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 11,169 contacts → | ||||
Partial evidence “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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. | |||||
| 6 | 4,942 contacts → | ||||
Partial evidence “We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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. | |||||
| 9 | 3,447 contacts → | ||||
Partial evidence “Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 3,387 contacts → | ||||
Partial evidence “Il Gruppo Sicuritalia, con oltre 18.500 dipendenti, è la più grande azienda italiana ed il secondo player privato europeo in ambito Security.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 3,145 contacts → | ||||
Indirect evidence “Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 2,822 contacts → | ||||
Indirect evidence “Rapid7, Inc.(NASDAQ: RPD) is a global leader in AI-powered managed cybersecurity operations, trusted to advance organizations’ cyber resilience.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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. | |||||
| 14 | 2,172 contacts → | ||||
Indirect evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 2,163 contacts → | ||||
Indirect evidence “The identity standard for government, finance, and high-assurance organizations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 2,157 contacts → | ||||
Indirect evidence “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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, 2026Thanks. The Data Team will review it. | |||||
| 18 | 1,648 contacts → | ||||
Indirect evidence “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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. | |||||
| 20 | 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. | |||||
| 21 | 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. | |||||
| 22 | 1,340 contacts → | ||||
Partial evidence “At Imvula Quality Protection, we don’t just provide security, we create peace of mind.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1,297 contacts → | ||||
Indirect evidence “Sangfor Technologies is a global leader in cybersecurity, cloud computing, and IT infrastructure, providing fully integrated and AI-driven solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1,285 contacts → | ||||
Partial evidence “ReliaQuest exists to Make Security Possible.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 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. | |||||
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 service providers. 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 service providers.
- Partial evidence
- Its own public description names part of information security service providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name information security service providers. 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 34,825 information security service providers worldwide
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Information security service providers 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 service providers, 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 service providers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “information security service providers”. 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 service providers), 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 service providers, 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, 160,329 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 service providers by location
170 lists · largest firstEvery Information security service providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Information security service providers based in the United States8,583
- Information security service providers based in India2,460
- Information security service providers based in the United Kingdom2,160
- Information security service providers based in Germany1,214
- Information security service providers based in France1,173
- Information security service providers based in Brazil1,139
- Information security service providers based in Canada1,119
- Information security service providers based in Australia1,058
- Information security service providers based in the Netherlands646
- Information security service providers based in Spain572
- Information security service providers based in Italy557
- Information security service providers based in the United Arab Emirates504
- Information security service providers based in Mexico433
- Information security service providers based in South Africa371
- Information security service providers based in Türkiye363
- Information security service providers based in Switzerland328
- Information security service providers based in Israel292
- Information security service providers based in Poland291
- Information security service providers based in Belgium276
- Information security service providers based in Pakistan263
- Information security service providers based in Sweden255
- Information security service providers based in Colombia239
- Information security service providers based in Chile228
- Information security service providers based in Saudi Arabia219
- Information security service providers based in Argentina204
- Information security service providers based in Nigeria203
- Information security service providers based in Singapore202
- Information security service providers based in Indonesia191
- Information security service providers based in Austria144
- Information security service providers based in New Zealand140
- Information security service providers based in Malaysia139
- Information security service providers based in Romania131
- Information security service providers based in Ireland129
- Information security service providers based in Kenya128
- Information security service providers based in Denmark114
- Information security service providers based in Peru109
- Information security service providers based in Portugal108
- Information security service providers based in Egypt107
- Information security service providers based in Bangladesh105
- Information security service providers based in Morocco102
- Information security service providers based in Greece89
- Information security service providers based in Finland85
- Information security service providers based in Hungary84
- Information security service providers based in Ecuador83
- Information security service providers based in the Philippines77
- Information security service providers based in Japan76
- Information security service providers based in Norway69
- Information security service providers based in Thailand69
- Information security service providers based in Ukraine65
- Information security service providers based in Ghana64
- Information security service providers based in Russia64
- Information security service providers based in Sri Lanka64
- Information security service providers based in Bulgaria59
- Information security service providers based in Slovakia55
- Information security service providers based in Qatar54
- Information security service providers based in Hong Kong50
- Information security service providers based in Estonia49
- Information security service providers based in Luxembourg47
- Information security service providers based in Tunisia46
- Information security service providers based in Jordan45
- Information security service providers based in Nepal41
- Information security service providers based in the Dominican Republic41
- Information security service providers based in Croatia40
- Information security service providers based in Cyprus40
- Information security service providers based in Panama37
- Information security service providers based in Costa Rica35
- Information security service providers based in Venezuela33
- Information security service providers based in Taiwan31
- Information security service providers based in Serbia29
- Information security service providers based in Bahrain28
- Information security service providers based in Puerto Rico28
- Information security service providers based in Uruguay28
- Information security service providers based in Oman26
Cities
- Information security service providers based in London, United Kingdom761
- Information security service providers based in Sao Paulo, Brazil346
- Information security service providers based in New York, United States256
- Information security service providers based in Toronto, Canada233
- Information security service providers based in Sydney, Australia203
- Information security service providers based in Melbourne, Australia199
- Information security service providers based in Hyderabad, India195
- Information security service providers based in Pune, India184
- Information security service providers based in Mumbai, India162
- Information security service providers based in Bangalore, India153
- Information security service providers based in Houston, United States153
- Information security service providers based in New Delhi, India148
- Information security service providers based in Atlanta, United States146
- Information security service providers based in Washington, United States144
- Information security service providers based in Dallas, United States140
- Information security service providers based in Austin, United States138
- Information security service providers based in Chicago, United States127
- Information security service providers based in Miami, United States127
- Information security service providers based in Noida, India122
- Information security service providers based in Chennai, India120
- Information security service providers based in Montreal, Canada118
- Information security service providers based in Bengaluru, India110
- Information security service providers based in Ahmedabad, India105
- Information security service providers based in Tampa, United States103
- Information security service providers based in Berlin, Germany97
- Information security service providers based in Calgary, Canada97
- Information security service providers based in San Francisco, United States93
- Information security service providers based in San Diego, United States83
- Information security service providers based in Los Angeles, United States82
- Information security service providers based in Rio De Janeiro, Brazil81
- Information security service providers based in Ottawa, Canada79
- Information security service providers based in Brisbane, Australia78
- Information security service providers based in Karachi, Pakistan75
- Information security service providers based in Charlotte, United States73
- Information security service providers based in Denver, United States71
- Information security service providers based in Arlington, United States70
- Information security service providers based in Manchester, United Kingdom68
- Information security service providers based in Vancouver, Canada68
- Information security service providers based in Delhi, India65
- Information security service providers based in Boston, United States64
- Information security service providers based in Columbia, United States60
- Information security service providers based in Las Vegas, United States60
- Information security service providers based in Orlando, United States59
- Information security service providers based in San Antonio, United States58
- Information security service providers based in Seattle, United States56
- Information security service providers based in Alexandria, United States53
- Information security service providers based in Gurugram, India52
- Information security service providers based in Reston, United States52
- Information security service providers based in Phoenix, United States51
- Information security service providers based in Canberra, Australia50
- Information security service providers based in Gurgaon, India49
- Information security service providers based in Mclean, United States48
- Information security service providers based in Rome, Italy46
- Information security service providers based in Brasilia, Brazil45
- Information security service providers based in Raleigh, United States45
- Information security service providers based in Belo Horizonte, Brazil44
- Information security service providers based in Baltimore, United States43
- Information security service providers based in Irvine, United States43
- Information security service providers based in Mississauga, Canada42
- Information security service providers based in Perth, Australia42
- Information security service providers based in Hamburg, Germany41
- Information security service providers based in Huntsville, United States41
- Information security service providers based in Wilmington, United States41
- Information security service providers based in Ashburn, United States40
- Information security service providers based in Birmingham, United Kingdom40
- Information security service providers based in Fairfax, United States40
- Information security service providers based in Portland, United States39
- Information security service providers based in Roma, Italy38
- Information security service providers based in Minneapolis, United States37
- Information security service providers based in Munich, Germany37
- Information security service providers based in Pittsburgh, United States37
- Information security service providers based in Barueri, Brazil35
- Information security service providers based in Indianapolis, United States35
- Information security service providers based in Navi Mumbai, India35
- Information security service providers based in Plano, United States35
- Information security service providers based in Scottsdale, United States35
- Information security service providers based in Edmonton, Canada34
- Information security service providers based in Richmond, United States34
- Information security service providers based in San Jose, United States34
- Information security service providers based in Columbus, United States33
- Information security service providers based in Fort Lauderdale, United States33
- Information security service providers based in Adelaide, Australia32
- Information security service providers based in Colorado Springs, United States32
- Information security service providers based in Curitiba, Brazil32
- Information security service providers based in Dover, United States30
- Information security service providers based in Nashville, United States30
- Information security service providers based in Alpharetta, United States29
- Information security service providers based in Herndon, United States29
- Information security service providers based in Philadelphia, United States29
- Information security service providers based in Cheltenham, United Kingdom27
- Information security service providers based in Leeds, United Kingdom27
- Information security service providers based in Milan, Italy27
- Information security service providers based in Vienna, United States27
- Information security service providers based in Frisco, United States26
- Information security service providers based in Milano, Italy26
- Information security service providers based in Porto Alegre, Brazil26
- Information security service providers based in Bristol, 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 service providers, 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 service providers are there worldwide?
RevenueBase identified 34,825 information security service providers 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?
Palo Alto Networks, headquartered in Santa Clara, tops this list with the largest team on record.
Which country has the most information security service providers?
The United States leads with 8,583 companies, followed by India (2,460) and the United Kingdom (2,160). Every information security service providers list by country and city is linked on this page.
Which city has the most information security service providers?
London leads with 774 headquartered companies, followed by Sao Paulo (346) and Paris (301).
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 160,329 verified decision-maker contacts tracked across these 34,825 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.