Company lists · Data refreshed September 2026
Top 25 Security and threat detection services worldwide
RevenueBase identified 23,424 security and threat detection services worldwide as of September 2026 and tracks 646,631 professional contacts across them, including 122,179 with verified work emails. The United States is the largest market and London the largest hub.
This list covers security and threat detection 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 security and threat detection 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 security and threat detection services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 79,699 contacts → | ||||
Partial evidence “G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 62,804 contacts → | ||||
Partial evidence “Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 40,747 contacts → | ||||
Indirect evidence “50 Years of Excellence: Experience, Innovation, and Commitment to Safety.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 6,335 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 6,169 contacts → | ||||
Indirect evidence “Making the world a safer place.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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. | |||||
| 8 | 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. | |||||
| 9 | 4,722 contacts → | ||||
Indirect evidence “Intent-based protection for every human and every AI agent, across all data.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 3,843 contacts → | ||||
Partial evidence “Securitas vous apporte son savoir‑faire et ses compétences dans la sécurisation de votre entreprise.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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. | |||||
| 12 | 3,649 contacts → | ||||
Strong 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. | |||||
| 13 | 3,620 contacts → | ||||
Partial evidence “Securitas, Soluciones de Seguridad a medida Nuestro liderazgo en conocimientos de seguridad nos ha permitido desarrollar una estrategia basada en tres pilares fundamentales…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 3,592 contacts → | ||||
Indirect evidence “U.S.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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. | |||||
| 16 | 3,145 contacts → | ||||
Indirect evidence “Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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. | |||||
| 18 | 3,004 contacts → | ||||
Partial evidence “Securitas is a global knowledge leader in security.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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. | |||||
| 20 | 2,772 contacts → | ||||
Indirect evidence “Fundado em 1992, o GRUPO GR se consolidou no mercado por sua qualidade e seriedade na implantação e operação de soluções de segurança e serviços para diversos tipos de clientes.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2,722 contacts → | ||||
Strong evidence “As a global leader in threat detection and screening technologies, every minute of every day Smiths Detection's technologies and people make the world a safer place.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2,715 contacts → | ||||
Strong evidence “Varonis unifies AI-native data security, AI security and governance, and behavior-based threat detection.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2,266 contacts → | ||||
Partial evidence “Andy Frain Services.America's leading provider of integrated solutions to security and events needs for over 90 years.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 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. | |||||
| 25 | 2,172 contacts → | ||||
Strong 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. | |||||
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: security and threat detection 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 security and threat detection services.
- Partial evidence
- Its own public description names part of security and threat detection services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name security and threat detection 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 23,424 security and threat detection services worldwide
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Security and threat detection 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 security and threat detection 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 security and threat detection services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “security and threat detection 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 security and threat detection 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 security and threat detection 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, 122,179 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.
Security and threat detection services by location
116 lists · largest firstEvery Security and threat detection services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Security and threat detection services based in the United States5,215
- Security and threat detection services based in India1,637
- Security and threat detection services based in the United Kingdom1,360
- Security and threat detection services based in Brazil953
- Security and threat detection services based in France827
- Security and threat detection services based in Canada771
- Security and threat detection services based in Australia624
- Security and threat detection services based in Germany624
- Security and threat detection services based in Italy488
- Security and threat detection services based in the Netherlands451
- Security and threat detection services based in Spain415
- Security and threat detection services based in South Africa403
- Security and threat detection services based in Mexico350
- Security and threat detection services based in the United Arab Emirates324
- Security and threat detection services based in Türkiye231
- Security and threat detection services based in Argentina228
- Security and threat detection services based in Belgium227
- Security and threat detection services based in Chile208
- Security and threat detection services based in Israel204
- Security and threat detection services based in Colombia192
- Security and threat detection services based in Switzerland186
- Security and threat detection services based in Sweden174
- Security and threat detection services based in Pakistan164
- Security and threat detection services based in Poland152
- Security and threat detection services based in Singapore147
- Security and threat detection services based in Saudi Arabia139
- Security and threat detection services based in Nigeria132
- Security and threat detection services based in Kenya120
- Security and threat detection services based in Peru120
- Security and threat detection services based in Romania115
- Security and threat detection services based in Indonesia106
- Security and threat detection services based in Malaysia106
- Security and threat detection services based in New Zealand94
- Security and threat detection services based in Portugal93
- Security and threat detection services based in Egypt88
- Security and threat detection services based in Denmark87
- Security and threat detection services based in Ecuador81
- Security and threat detection services based in Greece73
- Security and threat detection services based in Ireland73
- Security and threat detection services based in Japan73
- Security and threat detection services based in Austria71
- Security and threat detection services based in the Philippines70
- Security and threat detection services based in Finland51
- Security and threat detection services based in Qatar51
- Security and threat detection services based in Hungary49
- Security and threat detection services based in Ukraine47
- Security and threat detection services based in Bulgaria38
- Security and threat detection services based in Norway35
- Security and threat detection services based in Thailand35
- Security and threat detection services based in Uruguay35
- Security and threat detection services based in Hong Kong31
- Security and threat detection services based in Slovakia31
- Security and threat detection services based in Costa Rica30
- Security and threat detection services based in Cyprus30
- Security and threat detection services based in Estonia27
- Security and threat detection services based in Panama27
- Security and threat detection services based in Luxembourg25
Cities
- Security and threat detection services based in London, United Kingdom398
- Security and threat detection services based in Sao Paulo, Brazil239
- Security and threat detection services based in New York, United States142
- Security and threat detection services based in Toronto, Canada139
- Security and threat detection services based in Pune, India120
- Security and threat detection services based in Mumbai, India113
- Security and threat detection services based in Hyderabad, India112
- Security and threat detection services based in New Delhi, India106
- Security and threat detection services based in Bangalore, India100
- Security and threat detection services based in Houston, United States100
- Security and threat detection services based in Sydney, Australia100
- Security and threat detection services based in Melbourne, Australia96
- Security and threat detection services based in Dallas, United States90
- Security and threat detection services based in Miami, United States90
- Security and threat detection services based in Chennai, India81
- Security and threat detection services based in San Francisco, United States80
- Security and threat detection services based in Atlanta, United States78
- Security and threat detection services based in Austin, United States78
- Security and threat detection services based in Noida, India75
- Security and threat detection services based in Ahmedabad, India71
- Security and threat detection services based in Bengaluru, India69
- Security and threat detection services based in Chicago, United States69
- Security and threat detection services based in Los Angeles, United States64
- Security and threat detection services based in Montreal, Canada62
- Security and threat detection services based in Johannesburg, South Africa60
- Security and threat detection services based in Washington, United States58
- Security and threat detection services based in Calgary, Canada54
- Security and threat detection services based in Karachi, Pakistan54
- Security and threat detection services based in Rio De Janeiro, Brazil54
- Security and threat detection services based in Manchester, United Kingdom45
- Security and threat detection services based in Gurgaon, India44
- Security and threat detection services based in Phoenix, United States44
- Security and threat detection services based in Boston, United States43
- Security and threat detection services based in Denver, United States41
- Security and threat detection services based in Cape Town, South Africa40
- Security and threat detection services based in Ottawa, Canada40
- Security and threat detection services based in Tampa, United States40
- Security and threat detection services based in Brisbane, Australia38
- Security and threat detection services based in Las Vegas, United States38
- Security and threat detection services based in San Diego, United States38
- Security and threat detection services based in Columbia, United States37
- Security and threat detection services based in San Jose, United States36
- Security and threat detection services based in Mississauga, Canada35
- Security and threat detection services based in Arlington, United States34
- Security and threat detection services based in Vancouver, Canada34
- Security and threat detection services based in Belo Horizonte, Brazil32
- Security and threat detection services based in Charlotte, United States32
- Security and threat detection services based in Curitiba, Brazil32
- Security and threat detection services based in Gurugram, India32
- Security and threat detection services based in San Antonio, United States32
- Security and threat detection services based in Baltimore, United States31
- Security and threat detection services based in Edmonton, Canada31
- Security and threat detection services based in Seattle, United States30
- Security and threat detection services based in Birmingham, United Kingdom28
- Security and threat detection services based in Wilmington, United States28
- Security and threat detection services based in Fort Lauderdale, United States26
- Security and threat detection services based in Raleigh, United States26
- Security and threat detection services based in Reston, United States26
- Security and threat detection 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 security and threat detection 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 security and threat detection services are there worldwide?
RevenueBase identified 23,424 security and threat detection 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?
G4s, headquartered in London, tops this list with the largest team on record.
Which country has the most security and threat detection services?
The United States leads with 5,215 companies, followed by India (1,637) and the United Kingdom (1,360). Every security and threat detection services list by country and city is linked on this page.
Which city has the most security and threat detection services?
London leads with 407 headquartered companies, followed by Sao Paulo (239) and Dubai (190).
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 122,179 verified decision-maker contacts tracked across these 23,424 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.