Company lists · Data refreshed September 2026
Top 25 Information security firms worldwide
RevenueBase identified 28,034 information security firms worldwide as of September 2026 and tracks 409,380 professional contacts across them, including 128,261 with verified work emails. The United States is the largest market and London the largest hub.
This list covers information security firms 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 firms 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 firms 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 28, 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 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 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 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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. | |||||
| 8 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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. | |||||
| 11 | 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 28, 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 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,669 contacts → | ||||
Indirect evidence “BeyondTrust is the global cybersecurity leader protecting Paths to Privilege™.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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. | |||||
| 16 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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. | |||||
| 18 | 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. | |||||
| 19 | 1,217 contacts → | ||||
Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1,119 contacts → | ||||
Indirect evidence “OPSWAT protects critical infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1,059 contacts → | ||||
Indirect evidence “WatchGuard® Technologies, Inc.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1,050 contacts → | ||||
Partial evidence “Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1,041 contacts → | ||||
Indirect evidence “A lo largo de 30 años, hemos incursionado y evolucionado en distintas áreas atendiendo en el continente americano a clientes privados, corporativos y sector gobierno.” Source: RevenueBase Database · checked Sep 28, 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 28, 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 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 firms. 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 firms.
- Partial evidence
- Its own public description names part of information security firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name information security firms. 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 28,034 information security firms worldwide
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Information security firms 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 firms, 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 firms are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “information security firms”. 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 firms), 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 firms, 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, 128,261 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 firms by location
189 lists · largest firstEvery Information security firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Information security firms based in the United States6,853
- Information security firms based in India2,098
- Information security firms based in the United Kingdom1,689
- Information security firms based in Brazil916
- Information security firms based in France897
- Information security firms based in Canada879
- Information security firms based in Germany795
- Information security firms based in Australia790
- Information security firms based in the Netherlands540
- Information security firms based in Spain488
- Information security firms based in Italy431
- Information security firms based in the United Arab Emirates399
- Information security firms based in Mexico366
- Information security firms based in Türkiye304
- Information security firms based in South Africa297
- Information security firms based in Israel269
- Information security firms based in Switzerland261
- Information security firms based in Poland223
- Information security firms based in Belgium219
- Information security firms based in Colombia207
- Information security firms based in Sweden199
- Information security firms based in Pakistan197
- Information security firms based in Chile184
- Information security firms based in Saudi Arabia170
- Information security firms based in Indonesia166
- Information security firms based in Singapore165
- Information security firms based in Argentina160
- Information security firms based in Nigeria155
- Information security firms based in Malaysia113
- Information security firms based in Austria110
- Information security firms based in New Zealand105
- Information security firms based in Romania105
- Information security firms based in Kenya101
- Information security firms based in Portugal94
- Information security firms based in Peru92
- Information security firms based in Denmark89
- Information security firms based in Ireland87
- Information security firms based in Japan78
- Information security firms based in Hungary77
- Information security firms based in Egypt76
- Information security firms based in Greece75
- Information security firms based in Ecuador74
- Information security firms based in Morocco73
- Information security firms based in Russia73
- Information security firms based in Finland71
- Information security firms based in the Philippines65
- Information security firms based in Ukraine61
- Information security firms based in Thailand57
- Information security firms based in Norway55
- Information security firms based in Sri Lanka50
- Information security firms based in Bulgaria48
- Information security firms based in Estonia47
- Information security firms based in Hong Kong47
- Information security firms based in Qatar47
- Information security firms based in Slovakia47
- Information security firms based in Ghana46
- Information security firms based in Tunisia41
- Information security firms based in the Dominican Republic41
- Information security firms based in Jordan40
- Information security firms based in South Korea39
- Information security firms based in Luxembourg33
- Information security firms based in Vietnam32
- Information security firms based in Cyprus30
- Information security firms based in Uruguay29
- Information security firms based in Panama28
- Information security firms based in Taiwan27
- Information security firms based in Venezuela27
Cities
- Information security firms based in London, United Kingdom660
- Information security firms based in Sao Paulo, Brazil303
- Information security firms based in Paris, France257
- Information security firms based in Dubai, United Arab Emirates242
- Information security firms based in New York, United States210
- Information security firms based in Toronto, Canada188
- Information security firms based in Hyderabad, India167
- Information security firms based in Sydney, Australia166
- Information security firms based in Pune, India165
- Information security firms based in Singapore, Singapore147
- Information security firms based in Melbourne, Australia144
- Information security firms based in Mumbai, India136
- Information security firms based in Bangalore, India134
- Information security firms based in Madrid, Spain132
- Information security firms based in Austin, United States126
- Information security firms based in New Delhi, India126
- Information security firms based in Houston, United States123
- Information security firms based in Atlanta, United States121
- Information security firms based in Washington, United States121
- Information security firms based in Riyadh, Saudi Arabia113
- Information security firms based in Istanbul, Türkiye111
- Information security firms based in Miami, United States109
- Information security firms based in Chicago, United States106
- Information security firms based in Dallas, United States106
- Information security firms based in Bengaluru, India102
- Information security firms based in Montreal, Canada102
- Information security firms based in Chennai, India100
- Information security firms based in Noida, India99
- Information security firms based in San Francisco, United States99
- Information security firms based in Stockholm, Sweden89
- Information security firms based in Nairobi, Kenya87
- Information security firms based in Tampa, United States86
- Information security firms based in Ahmedabad, India84
- Information security firms based in Johannesburg, South Africa77
- Information security firms based in Ottawa, Canada75
- Information security firms based in Rio De Janeiro, Brazil72
- Information security firms based in Calgary, Canada70
- Information security firms based in Los Angeles, United States70
- Information security firms based in San Diego, United States68
- Information security firms based in Tel Aviv, Israel67
- Information security firms based in Warszawa, Poland67
- Information security firms based in Barcelona, Spain66
- Information security firms based in Berlin, Germany64
- Information security firms based in Brisbane, Australia63
- Information security firms based in Santiago, Chile63
- Information security firms based in Bogota, Colombia62
- Information security firms based in Boston, United States61
- Information security firms based in Ciudad De Mexico, Mexico61
- Information security firms based in Denver, United States61
- Information security firms based in Manchester, United Kingdom61
- Information security firms based in Arlington, United States58
- Information security firms based in Charlotte, United States58
- Information security firms based in Columbia, United States57
- Information security firms based in Karachi, Pakistan53
- Information security firms based in Vancouver, Canada53
- Information security firms based in Orlando, United States52
- Information security firms based in Seattle, United States51
- Information security firms based in Las Vegas, United States48
- Information security firms based in Lima, Peru48
- Information security firms based in San Antonio, United States48
- Information security firms based in Amsterdam, Netherlands46
- Information security firms based in Jakarta, Indonesia46
- Information security firms based in Phoenix, United States45
- Information security firms based in Belo Horizonte, Brazil44
- Information security firms based in Canberra, Australia44
- Information security firms based in Reston, United States44
- Information security firms based in Gurgaon, India43
- Information security firms based in Alexandria, United States42
- Information security firms based in Auckland, New Zealand41
- Information security firms based in Bucharest, Romania41
- Information security firms based in Kuala Lumpur, Malaysia40
- Information security firms based in Quito, Ecuador40
- Information security firms based in Ankara, Türkiye39
- Information security firms based in Baltimore, United States39
- Information security firms based in Bangkok, Thailand39
- Information security firms based in Sheridan, United States38
- Information security firms based in Wellington, New Zealand38
- Information security firms based in Cape Town, South Africa37
- Information security firms based in Wilmington, United States37
- Information security firms based in Gurugram, India36
- Information security firms based in Mclean, United States36
- Information security firms based in Raleigh, United States36
- Information security firms based in Rome, Italy36
- Information security firms based in Ashburn, United States35
- Information security firms based in Brasilia, Brazil35
- Information security firms based in Cairo, Egypt35
- Information security firms based in Fairfax, United States35
- Information security firms based in Scottsdale, United States35
- Information security firms based in Zurich, Switzerland35
- Information security firms based in Minneapolis, United States34
- Information security firms based in San Jose, United States34
- Information security firms based in Tallinn, Estonia34
- Information security firms based in Abu Dhabi, United Arab Emirates33
- Information security firms based in Huntsville, United States33
- Information security firms based in Mississauga, Canada33
- Information security firms based in Munich, Germany33
- Information security firms based in Pittsburgh, United States33
- Information security firms based in Amman, Jordan32
- Information security firms based in Philadelphia, United States32
- Information security firms based in Birmingham, United Kingdom31
- Information security firms based in Hamburg, Germany31
- Information security firms based in Plano, United States31
- Information security firms based in Portland, United States31
- Information security firms based in Athens, Greece30
- Information security firms based in Curitiba, Brazil30
- Information security firms based in Kyiv, Ukraine30
- Information security firms based in Roma, Italy30
- Information security firms based in Bratislava, Slovakia29
- Information security firms based in Columbus, United States29
- Information security firms based in Wien, Austria29
- Information security firms based in Dover, United States28
- Information security firms based in Oslo, Norway28
- Information security firms based in Barueri, Brazil27
- Information security firms based in Budapest, Hungary27
- Information security firms based in Colorado Springs, United States27
- Information security firms based in Fort Lauderdale, United States27
- Information security firms based in Navi Mumbai, India27
- Information security firms based in Richmond, United States27
- Information security firms based in Irvine, United States26
- Information security firms based in Lyon, France26
- Information security firms based in Cheltenham, United Kingdom25
- Information security firms based in Herndon, 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 firms, 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 firms are there worldwide?
RevenueBase identified 28,034 information security firms 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 firms?
The United States leads with 6,853 companies, followed by India (2,098) and the United Kingdom (1,689). Every information security firms list by country and city is linked on this page.
Which city has the most information security firms?
London leads with 672 headquartered companies, followed by Sao Paulo (303) and Paris (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 128,261 verified decision-maker contacts tracked across these 28,034 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.
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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.