Company lists · Data refreshed September 2026
Top 25 Information security services companies worldwide
RevenueBase identified 31,230 information security services companies worldwide as of September 2026 and tracks 427,310 professional contacts across them, including 118,485 with verified work emails. The United States is the largest market and London the largest hub.
This list covers information security services 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 21, 2026. Country and city lists for information security services 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 services companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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. | |||||
| 2 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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. | |||||
| 4 | 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. | |||||
| 5 | 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. | |||||
| 6 | 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. | |||||
| 7 | 3,649 contacts → | ||||
Partial evidence “We are a crowdsourced security company that safeguards organizations' assets from sophisticated threat actors before they can strike-by uniting our customers with trusted hackers…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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. | |||||
| 9 | 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. | |||||
| 10 | 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. | |||||
| 11 | 1,949 contacts → | ||||
Partial evidence “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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. | |||||
| 13 | 1,419 contacts → | ||||
Indirect evidence “See a different world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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. | |||||
| 15 | 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. | |||||
| 16 | 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. | |||||
| 17 | 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. | |||||
| 18 | 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. | |||||
| 19 | 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. | |||||
| 20 | 1,225 contacts → | ||||
Partial evidence “Securitas is the global knowledge leader in Security & loss prevention, with revenues of over $12bn, employing more than people in 44 markets.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1,217 contacts → | ||||
Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1,138 contacts → | ||||
Partial evidence “At Titan Security Group, we understand that each client is unique, with specific security needs shaped by the type of property and its location.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1,062 contacts → | ||||
Indirect evidence “Founded in 1982, St.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1,026 contacts → | ||||
Indirect evidence “Irdeto, a CANAL+ company, is the world leader in digital platform cybersecurity, empowering businesses to innovate for a secure, connected future.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 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. | |||||
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 services 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 services companies.
- Partial evidence
- Its own public description names part of information security services 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 services 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 31,230 information security services companies worldwide
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Information security services companies 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 services 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 services companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “information security services 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 services 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 services 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, 118,485 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 services companies by location
165 lists · largest firstEvery Information security services companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Information security services companies based in the United States7,243
- Information security services companies based in India2,297
- Information security services companies based in the United Kingdom1,863
- Information security services companies based in Brazil1,151
- Information security services companies based in Germany1,035
- Information security services companies based in France1,004
- Information security services companies based in Canada951
- Information security services companies based in Australia869
- Information security services companies based in the Netherlands574
- Information security services companies based in Spain552
- Information security services companies based in Italy486
- Information security services companies based in the United Arab Emirates440
- Information security services companies based in Mexico415
- Information security services companies based in Türkiye339
- Information security services companies based in South Africa332
- Information security services companies based in Switzerland284
- Information security services companies based in Poland282
- Information security services companies based in Israel261
- Information security services companies based in Belgium246
- Information security services companies based in Colombia245
- Information security services companies based in Pakistan236
- Information security services companies based in Chile226
- Information security services companies based in Sweden224
- Information security services companies based in Argentina212
- Information security services companies based in Saudi Arabia204
- Information security services companies based in Nigeria189
- Information security services companies based in Indonesia184
- Information security services companies based in Singapore162
- Information security services companies based in Romania136
- Information security services companies based in China132
- Information security services companies based in Austria130
- Information security services companies based in Malaysia128
- Information security services companies based in Peru125
- Information security services companies based in Kenya123
- Information security services companies based in New Zealand116
- Information security services companies based in Portugal109
- Information security services companies based in Ireland108
- Information security services companies based in Egypt103
- Information security services companies based in Denmark96
- Information security services companies based in Bangladesh92
- Information security services companies based in Ecuador92
- Information security services companies based in Greece91
- Information security services companies based in Morocco91
- Information security services companies based in Hungary85
- Information security services companies based in Finland82
- Information security services companies based in Japan77
- Information security services companies based in the Philippines75
- Information security services companies based in Russia73
- Information security services companies based in Ukraine67
- Information security services companies based in Thailand60
- Information security services companies based in Bulgaria58
- Information security services companies based in Norway56
- Information security services companies based in Sri Lanka56
- Information security services companies based in Qatar55
- Information security services companies based in Slovakia53
- Information security services companies based in Ghana50
- Information security services companies based in Tunisia49
- Information security services companies based in Hong Kong44
- Information security services companies based in Estonia43
- Information security services companies based in Luxembourg40
- Information security services companies based in the Dominican Republic40
- Information security services companies based in Jordan38
- Information security services companies based in Venezuela38
- Information security services companies based in Costa Rica34
- Information security services companies based in Croatia34
- Information security services companies based in Cyprus34
- Information security services companies based in Nepal33
- Information security services companies based in Panama32
- Information security services companies based in Oman30
- Information security services companies based in Serbia30
- Information security services companies based in Uruguay30
- Information security services companies based in Puerto Rico26
- Information security services companies based in Taiwan26
Cities
- Information security services companies based in London, United Kingdom669
- Information security services companies based in Sao Paulo, Brazil326
- Information security services companies based in New York, United States207
- Information security services companies based in Toronto, Canada206
- Information security services companies based in Hyderabad, India171
- Information security services companies based in Pune, India168
- Information security services companies based in Sydney, Australia166
- Information security services companies based in Melbourne, Australia155
- Information security services companies based in New Delhi, India152
- Information security services companies based in Mumbai, India151
- Information security services companies based in Bangalore, India145
- Information security services companies based in Houston, United States129
- Information security services companies based in Atlanta, United States128
- Information security services companies based in Washington, United States120
- Information security services companies based in Chennai, India114
- Information security services companies based in Austin, United States111
- Information security services companies based in Noida, India109
- Information security services companies based in Dallas, United States108
- Information security services companies based in Chicago, United States105
- Information security services companies based in Miami, United States102
- Information security services companies based in Bengaluru, India101
- Information security services companies based in Ahmedabad, India99
- Information security services companies based in Montreal, Canada95
- Information security services companies based in Berlin, Germany87
- Information security services companies based in Rio De Janeiro, Brazil87
- Information security services companies based in Calgary, Canada83
- Information security services companies based in Johannesburg, South Africa83
- Information security services companies based in Tampa, United States83
- Information security services companies based in Ottawa, Canada79
- Information security services companies based in San Francisco, United States79
- Information security services companies based in San Diego, United States69
- Information security services companies based in Karachi, Pakistan68
- Information security services companies based in Los Angeles, United States65
- Information security services companies based in Arlington, United States64
- Information security services companies based in Delhi, India64
- Information security services companies based in Manchester, United Kingdom62
- Information security services companies based in Brisbane, Australia60
- Information security services companies based in Charlotte, United States59
- Information security services companies based in Denver, United States57
- Information security services companies based in Boston, United States56
- Information security services companies based in Vancouver, Canada55
- Information security services companies based in Columbia, United States54
- Information security services companies based in Las Vegas, United States52
- Information security services companies based in Gurgaon, India49
- Information security services companies based in Jaipur, India49
- Information security services companies based in Orlando, United States49
- Information security services companies based in Brasilia, Brazil48
- Information security services companies based in Seattle, United States48
- Information security services companies based in Alexandria, United States47
- Information security services companies based in Belo Horizonte, Brazil47
- Information security services companies based in San Antonio, United States47
- Information security services companies based in Canberra, Australia45
- Information security services companies based in Cape Town, South Africa44
- Information security services companies based in Phoenix, United States44
- Information security services companies based in Baltimore, United States40
- Information security services companies based in Raleigh, United States40
- Information security services companies based in Mclean, United States39
- Information security services companies based in Reston, United States39
- Information security services companies based in Wilmington, United States39
- Information security services companies based in Birmingham, United Kingdom37
- Information security services companies based in Curitiba, Brazil36
- Information security services companies based in Fairfax, United States36
- Information security services companies based in Gurugram, India36
- Information security services companies based in Huntsville, United States35
- Information security services companies based in Ashburn, United States34
- Information security services companies based in Mississauga, Canada34
- Information security services companies based in Perth, Australia34
- Information security services companies based in Cdmx, Mexico33
- Information security services companies based in Edmonton, Canada33
- Information security services companies based in Minneapolis, United States33
- Information security services companies based in Hamburg, Germany32
- Information security services companies based in Munich, Germany32
- Information security services companies based in Colorado Springs, United States31
- Information security services companies based in Irvine, United States31
- Information security services companies based in Navi Mumbai, India31
- Information security services companies based in Portland, United States31
- Information security services companies based in Richmond, United States31
- Information security services companies based in Adelaide, Australia30
- Information security services companies based in Monterrey, Mexico30
- Information security services companies based in Pittsburgh, United States30
- Information security services companies based in Plano, United States30
- Information security services companies based in Porto Alegre, Brazil30
- Information security services companies based in Scottsdale, United States30
- Information security services companies based in Barueri, Brazil29
- Information security services companies based in San Jose, United States29
- Information security services companies based in Columbus, United States27
- Information security services companies based in Dover, United States26
- Information security services companies based in Fort Lauderdale, United States26
- Information security services companies based in Herndon, United States26
- Information security services companies based in Indianapolis, United States26
- Information security services companies based in Philadelphia, United States26
- Information security services companies based in Alpharetta, 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 services 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 services companies are there worldwide?
RevenueBase identified 31,230 information security services 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?
Fortinet, headquartered in Sunnyvale, tops this list with the largest team on record.
Which country has the most information security services companies?
The United States leads with 7,243 companies, followed by India (2,297) and the United Kingdom (1,863). Every information security services companies list by country and city is linked on this page.
Which city has the most information security services companies?
London leads with 679 headquartered companies, followed by Sao Paulo (326) and Dubai (257).
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 118,485 verified decision-maker contacts tracked across these 31,230 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.