Company lists · Data refreshed September 2026
Top 25 Information security companies worldwide
RevenueBase identified 19,516 information security companies worldwide as of September 2026 and tracks 332,677 professional contacts across them, including 115,921 with verified work emails and 48,543 with mobile numbers. The United States is the largest market and London the largest hub.
This list covers information security 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 3, 2026. Country and city lists for information security 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 companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 18,430 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 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 14,326 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 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 11,179 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 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 4,963 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 3, 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 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 3,706 contacts → | ||||
Indirect evidence “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 3,566 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 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 3,490 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 3, 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 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 3,200 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 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 2,206 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 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 2,141 contacts → | ||||
Indirect evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 2,108 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 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 1,640 contacts → | ||||
Indirect evidence “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 3, 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 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 1,234 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 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 1,213 contacts → | ||||
Partial evidence “Druva is the leading provider of data security solutions, empowering customers to secure and recover their data from all threats.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1,211 contacts → | ||||
Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1,062 contacts → | ||||
Indirect evidence “Irdeto is the world leader in digital platform cybersecurity, empowering businesses to innovate for a secure, connected future.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1,054 contacts → | ||||
Indirect evidence “WatchGuard® Technologies, Inc.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | 981 contacts → | ||||
Indirect evidence “PPC is now part of DSA” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 960 contacts → | ||||
Indirect evidence “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | 894 contacts → | ||||
Indirect evidence “ZeroFox is the solution to discover, validate, and disrupt external cyber threats before they harm revenue or reputation.” Source: RevenueBase Database · checked Sep 3, 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 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 companies.
- Partial evidence
- Its own public description names part of information security 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 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 19,516 information security companies worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 115,921 reachable decision-makers.
Free signup · no credit card
Information security companies worldwide at a glance
As of Sep 3, 2026Companies by employee count
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 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
- 68 countries, largest first: the United States, India, the United Kingdom, Brazil, Canada, France, Australia, Germany, Spain, the Netherlands and 58 more. Country and city lists for information security companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “information security 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 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 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, 115,921 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 between September 3, 2026 and September 14, 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 companies by location
163 lists · largest firstEvery Information security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Information security companies based in the United States5,605
- Information security companies based in India1,988
- Information security companies based in the United Kingdom1,388
- Information security companies based in Brazil834
- Information security companies based in Canada735
- Information security companies based in France720
- Information security companies based in Australia687
- Information security companies based in Germany657
- Information security companies based in Spain398
- Information security companies based in the Netherlands393
- Information security companies based in the United Arab Emirates390
- Information security companies based in Italy351
- Information security companies based in Mexico315
- Information security companies based in Türkiye276
- Information security companies based in South Africa246
- Information security companies based in Israel222
- Information security companies based in Switzerland209
- Information security companies based in Poland196
- Information security companies based in Colombia194
- Information security companies based in Belgium185
- Information security companies based in Pakistan185
- Information security companies based in Chile173
- Information security companies based in Saudi Arabia173
- Information security companies based in Sweden171
- Information security companies based in Indonesia151
- Information security companies based in Singapore151
- Information security companies based in Nigeria144
- Information security companies based in Argentina132
- Information security companies based in Austria99
- Information security companies based in Malaysia94
- Information security companies based in Kenya93
- Information security companies based in Bangladesh86
- Information security companies based in Romania85
- Information security companies based in New Zealand81
- Information security companies based in Portugal80
- Information security companies based in Peru76
- Information security companies based in Czechia75
- Information security companies based in Egypt73
- Information security companies based in Morocco72
- Information security companies based in Japan71
- Information security companies based in Greece70
- Information security companies based in Ireland70
- Information security companies based in Denmark69
- Information security companies based in Ecuador68
- Information security companies based in Finland64
- Information security companies based in the Philippines61
- Information security companies based in Hungary59
- Information security companies based in Ukraine55
- Information security companies based in Thailand51
- Information security companies based in Sri Lanka48
- Information security companies based in Ghana47
- Information security companies based in Bulgaria44
- Information security companies based in Slovakia44
- Information security companies based in Estonia42
- Information security companies based in Qatar42
- Information security companies based in Norway41
- Information security companies based in Jordan38
- Information security companies based in Tunisia37
- Information security companies based in Hong Kong36
- Information security companies based in South Korea36
- Information security companies based in the Dominican Republic36
- Information security companies based in Nepal33
- Information security companies based in Vietnam33
- Information security companies based in Luxembourg31
- Information security companies based in Cyprus28
- Information security companies based in Taiwan28
- Information security companies based in Panama26
- Information security companies based in Uruguay25
Cities
- Information security companies based in London, United Kingdom561
- Information security companies based in Sao Paulo, Brazil275
- Information security companies based in Paris, France207
- Information security companies based in New York, United States172
- Information security companies based in Toronto, Canada167
- Information security companies based in Sydney, Australia155
- Information security companies based in Pune, India154
- Information security companies based in Hyderabad, India153
- Information security companies based in Melbourne, Australia138
- Information security companies based in Mumbai, India128
- Information security companies based in Bangalore, India121
- Information security companies based in New Delhi, India120
- Information security companies based in Madrid, Spain113
- Information security companies based in Houston, United States106
- Information security companies based in Austin, United States103
- Information security companies based in Washington, United States101
- Information security companies based in Atlanta, United States99
- Information security companies based in Bengaluru, India97
- Information security companies based in Dallas, United States96
- Information security companies based in Chennai, India95
- Information security companies based in Chicago, United States92
- Information security companies based in Montreal, Canada92
- Information security companies based in Noida, India91
- Information security companies based in Miami, United States89
- Information security companies based in San Francisco, United States86
- Information security companies based in Ahmedabad, India83
- Information security companies based in Tampa, United States76
- Information security companies based in Stockholm, Sweden73
- Information security companies based in Johannesburg, South Africa71
- Information security companies based in Calgary, Canada67
- Information security companies based in Ottawa, Canada64
- Information security companies based in Rio De Janeiro, Brazil64
- Information security companies based in Brisbane, Australia62
- Information security companies based in Barcelona, Spain61
- Information security companies based in Berlin, Germany58
- Information security companies based in San Diego, United States58
- Information security companies based in Los Angeles, United States57
- Information security companies based in Manchester, United Kingdom56
- Information security companies based in Warszawa, Poland56
- Information security companies based in Delhi, India54
- Information security companies based in Denver, United States54
- Information security companies based in Arlington, United States52
- Information security companies based in Tel Aviv, Israel52
- Information security companies based in Boston, United States51
- Information security companies based in Columbia, United States49
- Information security companies based in Karachi, Pakistan49
- Information security companies based in Charlotte, United States48
- Information security companies based in Orlando, United States48
- Information security companies based in Vancouver, Canada45
- Information security companies based in Las Vegas, United States43
- Information security companies based in San Antonio, United States43
- Information security companies based in Canberra, Australia42
- Information security companies based in Gurgaon, India42
- Information security companies based in Kolkata, India40
- Information security companies based in Reston, United States40
- Information security companies based in Seattle, United States40
- Information security companies based in Alexandria, United States39
- Information security companies based in Brasilia, Brazil38
- Information security companies based in Phoenix, United States38
- Information security companies based in Gurugram, India36
- Information security companies based in Amsterdam, Netherlands35
- Information security companies based in Auckland, New Zealand35
- Information security companies based in Belo Horizonte, Brazil35
- Information security companies based in Bucharest, Romania34
- Information security companies based in Perth, Australia34
- Information security companies based in Raleigh, United States33
- Information security companies based in Birmingham, United Kingdom31
- Information security companies based in Cape Town, South Africa31
- Information security companies based in Fairfax, United States31
- Information security companies based in Huntsville, United States31
- Information security companies based in Wilmington, United States31
- Information security companies based in Zurich, Switzerland31
- Information security companies based in Baltimore, United States30
- Information security companies based in San Jose, United States30
- Information security companies based in Cdmx, Mexico29
- Information security companies based in Mclean, United States29
- Information security companies based in Scottsdale, United States29
- Information security companies based in Athens, Greece28
- Information security companies based in Curitiba, Brazil28
- Information security companies based in Pittsburgh, United States28
- Information security companies based in Rome, Italy28
- Information security companies based in Ashburn, United States27
- Information security companies based in Kyiv, Ukraine27
- Information security companies based in Munich, Germany27
- Information security companies based in Cheltenham, United Kingdom26
- Information security companies based in Dover, United States26
- Information security companies based in Plano, United States26
- Information security companies based in Adelaide, Australia25
- Information security companies based in Colorado Springs, United States25
- Information security companies based in Columbus, United States25
- Information security companies based in Fort Lauderdale, United States25
- Information security companies based in Minneapolis, United States25
- Information security companies based in Mississauga, Canada25
- Information security companies based in Wellington, New Zealand25
- Information security companies based in Wien, Austria25
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 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 companies are there worldwide?
RevenueBase identified 19,516 information security 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?
Palo Alto Networks, headquartered in He, tops this list with the largest team on record.
Which country has the most information security companies?
The United States leads with 5,605 companies, followed by India (1,988) and the United Kingdom (1,388). Every information security companies list by country and city is linked on this page.
Which city has the most information security companies?
London leads with 545 headquartered companies, followed by Sao Paulo (268) and Dubai (238).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 115,921 verified decision-maker contacts tracked across these 19,516 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled from the company graph between September 3, 2026 and September 14, 2026.
Ready to reach these companies? Verified emails and direct dials for all 19,516 information security companies worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.