Company lists · Data refreshed September 2026
Top 25 Computer security services worldwide
RevenueBase identified 26,755 computer security services worldwide as of September 2026 and tracks 467,043 professional contacts across them, including 159,464 with verified work emails. The United States is the largest market and London the largest hub.
This list covers computer security services worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026. Country and city lists for computer security services follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest computer security services 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 | 10,118 contacts → | ||||
Partial evidence “CrowdStrike (Nasdaq: CRWD), a global cybersecurity leader, has redefined modern security with the world’s most advanced cloud-native platform for protecting critical areas of…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 8,242 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 7,668 contacts → | ||||
Indirect evidence “Check Point Software Technologies Ltd.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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. | |||||
| 9 | 4,942 contacts → | ||||
Indirect 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. | |||||
| 10 | 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. | |||||
| 11 | 3,822 contacts → | ||||
Indirect evidence “Our mission is simple – building a safer world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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. | |||||
| 13 | 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. | |||||
| 14 | 3,058 contacts → | ||||
Partial evidence “Qualys, Inc.(NASDAQ: QLYS) is a leading provider of disruptive cloud-based security, compliance and IT solutions with more than subscription customers worldwide, including a…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 3,052 contacts → | ||||
Indirect evidence “SentinelOne is the world's leading AI-powered cybersecurity platform.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 2,886 contacts → | ||||
Indirect evidence “SailPoint equips the modern enterprise to seamlessly manage and secure access to applications and data through the lens of identity – at speed and scale.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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. | |||||
| 18 | 2,523 contacts → | ||||
Partial evidence “NIL is a globally recognized provider of advanced data center, network, cloud, cyber security solutions as well as services for business and industry environments, state…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2,355 contacts → | ||||
Indirect evidence “Darktrace is a global leader in AI cybersecurity, providing the essential cybersecurity platform to secure organizations today and for an ever-changing future.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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. | |||||
| 21 | 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. | |||||
| 22 | 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. | |||||
| 23 | 2,083 contacts → | ||||
Indirect evidence “Acronis is a global cyber protection company delivering the only natively integrated cybersecurity, data protection, and infrastructure management platform for managed service…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 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. | |||||
| 25 | 1,719 contacts → | ||||
Indirect evidence “When technology enables progress, ESET is here to protect it.” 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: computer security services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names computer security services.
- Partial evidence
- Its own public description names part of computer security services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name computer security services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 26,755 computer security services worldwide
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Computer security services worldwide at a glance
As of Sep 21, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among computer security services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for computer security services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “computer security services”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names computer security services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among computer security services, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 159,464 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.
Computer security services by location
136 lists · largest firstEvery Computer security services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Computer security services based in the United States6,248
- Computer security services based in India2,139
- Computer security services based in the United Kingdom1,495
- Computer security services based in Brazil987
- Computer security services based in Canada820
- Computer security services based in France813
- Computer security services based in Australia735
- Computer security services based in Germany673
- Computer security services based in Spain472
- Computer security services based in the United Arab Emirates429
- Computer security services based in Italy419
- Computer security services based in the Netherlands416
- Computer security services based in Mexico355
- Computer security services based in Türkiye325
- Computer security services based in South Africa300
- Computer security services based in Israel263
- Computer security services based in Switzerland226
- Computer security services based in Pakistan220
- Computer security services based in Poland210
- Computer security services based in Belgium204
- Computer security services based in Saudi Arabia202
- Computer security services based in Colombia198
- Computer security services based in Chile192
- Computer security services based in Singapore180
- Computer security services based in Argentina170
- Computer security services based in Indonesia161
- Computer security services based in Nigeria157
- Computer security services based in Sweden153
- Computer security services based in Kenya120
- Computer security services based in Malaysia119
- Computer security services based in Romania102
- Computer security services based in New Zealand99
- Computer security services based in Peru99
- Computer security services based in Austria98
- Computer security services based in Egypt94
- Computer security services based in Bangladesh92
- Computer security services based in Ireland90
- Computer security services based in Japan87
- Computer security services based in Denmark84
- Computer security services based in Portugal79
- Computer security services based in Morocco77
- Computer security services based in Ecuador74
- Computer security services based in Greece72
- Computer security services based in the Philippines72
- Computer security services based in Finland63
- Computer security services based in Hungary60
- Computer security services based in Thailand60
- Computer security services based in Ukraine59
- Computer security services based in Slovakia51
- Computer security services based in Ghana50
- Computer security services based in Bulgaria47
- Computer security services based in Qatar46
- Computer security services based in Sri Lanka46
- Computer security services based in Nepal45
- Computer security services based in Estonia44
- Computer security services based in Norway44
- Computer security services based in the Dominican Republic42
- Computer security services based in Vietnam41
- Computer security services based in Jordan40
- Computer security services based in Tunisia40
- Computer security services based in Hong Kong38
- Computer security services based in Luxembourg34
- Computer security services based in Panama33
- Computer security services based in Taiwan32
- Computer security services based in Costa Rica29
- Computer security services based in Venezuela26
- Computer security services based in Serbia25
Cities
- Computer security services based in London, United Kingdom534
- Computer security services based in Sao Paulo, Brazil275
- Computer security services based in New York, United States191
- Computer security services based in Toronto, Canada169
- Computer security services based in Hyderabad, India156
- Computer security services based in Pune, India156
- Computer security services based in Sydney, Australia149
- Computer security services based in Bangalore, India130
- Computer security services based in New Delhi, India130
- Computer security services based in Mumbai, India128
- Computer security services based in Melbourne, Australia120
- Computer security services based in Houston, United States113
- Computer security services based in Austin, United States109
- Computer security services based in Chennai, India106
- Computer security services based in Chicago, United States101
- Computer security services based in Noida, India99
- Computer security services based in Miami, United States98
- Computer security services based in Ahmedabad, India95
- Computer security services based in Bengaluru, India95
- Computer security services based in San Francisco, United States92
- Computer security services based in Atlanta, United States91
- Computer security services based in Montreal, Canada89
- Computer security services based in Dallas, United States87
- Computer security services based in Washington, United States84
- Computer security services based in Tampa, United States76
- Computer security services based in Rio De Janeiro, Brazil73
- Computer security services based in San Diego, United States65
- Computer security services based in Karachi, Pakistan62
- Computer security services based in Ottawa, Canada62
- Computer security services based in Calgary, Canada60
- Computer security services based in Los Angeles, United States58
- Computer security services based in Brisbane, Australia56
- Computer security services based in Boston, United States55
- Computer security services based in Manchester, United Kingdom53
- Computer security services based in Gurgaon, India50
- Computer security services based in Columbia, United States49
- Computer security services based in Charlotte, United States48
- Computer security services based in Denver, United States48
- Computer security services based in Arlington, United States47
- Computer security services based in Las Vegas, United States47
- Computer security services based in Orlando, United States46
- Computer security services based in Wilmington, United States46
- Computer security services based in Vancouver, Canada45
- Computer security services based in San Antonio, United States43
- Computer security services based in Phoenix, United States42
- Computer security services based in Reston, United States40
- Computer security services based in Seattle, United States40
- Computer security services based in Kolkata, India39
- Computer security services based in Belo Horizonte, Brazil36
- Computer security services based in Brasilia, Brazil35
- Computer security services based in Mississauga, Canada35
- Computer security services based in Sheridan, United States35
- Computer security services based in Mclean, United States34
- Computer security services based in Baltimore, United States33
- Computer security services based in Canberra, Australia33
- Computer security services based in Curitiba, Brazil33
- Computer security services based in Fairfax, United States33
- Computer security services based in Gurugram, India33
- Computer security services based in San Jose, United States33
- Computer security services based in Scottsdale, United States31
- Computer security services based in Alexandria, United States30
- Computer security services based in Huntsville, United States30
- Computer security services based in Irvine, United States30
- Computer security services based in Raleigh, United States29
- Computer security services based in Colorado Springs, United States28
- Computer security services based in Fort Lauderdale, United States28
- Computer security services based in Birmingham, United Kingdom26
- Computer security services based in Dover, United States26
- Computer security services based in Pittsburgh, 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 computer security services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many computer security services are there worldwide?
RevenueBase identified 26,755 computer security services worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Palo Alto Networks, headquartered in Santa Clara, tops this list with the largest team on record.
Which country has the most computer security services?
The United States leads with 6,248 companies, followed by India (2,139) and the United Kingdom (1,495). Every computer security services list by country and city is linked on this page.
Which city has the most computer security services?
London leads with 545 headquartered companies, followed by Sao Paulo (275) and Dubai (262).
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 159,464 verified decision-maker contacts tracked across these 26,755 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.