Company lists · Data refreshed September 2026
Top 25 Security consultant companies worldwide
RevenueBase identified 15,767 security consultant companies worldwide as of September 2026 and tracks 226,086 professional contacts across them, including 43,854 with verified work emails. The United States is the largest market and London the largest hub.
This list covers security consultant companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026. Country and city lists for security consultant 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 security consultant companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 5,707 contacts → | ||||
Indirect evidence “Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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. | |||||
| 4 | 3,592 contacts → | ||||
Indirect evidence “U.S.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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. | |||||
| 6 | 2,500 contacts → | ||||
Partial evidence “The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 2,365 contacts → | ||||
Partial evidence “Founded in 1976, Paragon Security is Ontario’s largest privately owned security company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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. | |||||
| 9 | 1,949 contacts → | ||||
Partial evidence “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1,431 contacts → | ||||
Indirect evidence “Airbus Protect is an Airbus subsidiary bringing together expertise in cybersecurity, safety and sustainability-related services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,375 contacts → | ||||
Partial evidence “Guardsmark, LLC provides security services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1,374 contacts → | ||||
Partial evidence “First Security Group LLC was founded in 2004 with the vision of His Highness, the Vice President, Prime Minister, and Ruler of Dubai, Sheikh Mohamed bin Rashid Al Maktoum.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,361 contacts → | ||||
Indirect evidence “O Grupo Comando G8 é referência nacional na implantação e operação de soluções integradas em segurança e serviços.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 1,232 contacts → | ||||
Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 1,138 contacts → | ||||
Partial evidence “At Titan Security Group, we understand that each client is unique, with specific security needs shaped by the type of property and its location.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 1,081 contacts → | ||||
Partial evidence “Twenty-five years ago Andrews International (AI) began forming a network of the world’s foremost security authorities and connecting with strategic partners for operations…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 1,062 contacts → | ||||
Indirect evidence “Founded in 1982, St.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 1,050 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1,007 contacts → | ||||
Indirect evidence “La proposition de valeur d'Onet dans la sécurité se fonde sur - son expertise sécurité et sa capacité à analyser les besoins et risques propres à ses clients- sa parfaite maîtrise…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 891 contacts → | ||||
Partial evidence “Securitas es socio líder en soluciones de protección inteligente.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 792 contacts → | ||||
Partial evidence “Securitas AS er det største og eldste sikkerhetsselskapet i Norge.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 771 contacts → | ||||
Strong evidence “Since 2006, PSU has been the leading Scandinavian risk and security consultancy in China.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 748 contacts → | ||||
Partial evidence “Improving Security.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 659 contacts → | ||||
Indirect evidence “comienzos de 1989 se funda SABICO SEGURIDAD S.A, estando inscrita en el Registro de Empresas de Seguridad con el nº 1731.” 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 consultant 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 security consultant companies.
- Partial evidence
- Its own public description names part of security consultant companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name security consultant 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 15,767 security consultant companies worldwide
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Security consultant companies worldwide at a glance
As of Sep 21, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among security consultant companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for security consultant companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “security consultant 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 security consultant 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 security consultant 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, 43,854 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 consultant companies by location
83 lists · largest firstEvery Security consultant companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Security consultant companies based in the United States3,888
- Security consultant companies based in the United Kingdom1,044
- Security consultant companies based in India731
- Security consultant companies based in Brazil590
- Security consultant companies based in France581
- Security consultant companies based in Germany520
- Security consultant companies based in Canada483
- Security consultant companies based in Australia480
- Security consultant companies based in the Netherlands311
- Security consultant companies based in Mexico280
- Security consultant companies based in Italy255
- Security consultant companies based in Spain234
- Security consultant companies based in South Africa210
- Security consultant companies based in the United Arab Emirates185
- Security consultant companies based in Colombia164
- Security consultant companies based in Switzerland164
- Security consultant companies based in Sweden161
- Security consultant companies based in Chile147
- Security consultant companies based in Argentina142
- Security consultant companies based in Türkiye135
- Security consultant companies based in Israel125
- Security consultant companies based in Belgium122
- Security consultant companies based in Nigeria104
- Security consultant companies based in Peru95
- Security consultant companies based in Poland90
- Security consultant companies based in Singapore81
- Security consultant companies based in Indonesia74
- Security consultant companies based in Pakistan73
- Security consultant companies based in Romania65
- Security consultant companies based in Saudi Arabia64
- Security consultant companies based in New Zealand61
- Security consultant companies based in Malaysia60
- Security consultant companies based in Kenya58
- Security consultant companies based in Austria56
- Security consultant companies based in Denmark56
- Security consultant companies based in Ecuador53
- Security consultant companies based in Egypt51
- Security consultant companies based in Ireland50
- Security consultant companies based in Portugal50
- Security consultant companies based in Greece49
- Security consultant companies based in Finland42
- Security consultant companies based in Hungary35
- Security consultant companies based in the Philippines35
- Security consultant companies based in Qatar28
Cities
- Security consultant companies based in Sao Paulo, Brazil185
- Security consultant companies based in New York, United States108
- Security consultant companies based in Toronto, Canada105
- Security consultant companies based in Melbourne, Australia90
- Security consultant companies based in Sydney, Australia88
- Security consultant companies based in Houston, United States80
- Security consultant companies based in Atlanta, United States74
- Security consultant companies based in Washington, United States69
- Security consultant companies based in Chicago, United States60
- Security consultant companies based in Austin, United States57
- Security consultant companies based in Dallas, United States57
- Security consultant companies based in Pune, India57
- Security consultant companies based in Los Angeles, United States55
- Security consultant companies based in Rio De Janeiro, Brazil53
- Security consultant companies based in Bangalore, India50
- Security consultant companies based in Miami, United States50
- Security consultant companies based in Mumbai, India49
- Security consultant companies based in San Francisco, United States48
- Security consultant companies based in Calgary, Canada47
- Security consultant companies based in Tampa, United States46
- Security consultant companies based in Ottawa, Canada44
- Security consultant companies based in Chennai, India43
- Security consultant companies based in Montreal, Canada43
- Security consultant companies based in Denver, United States37
- Security consultant companies based in Bengaluru, India36
- Security consultant companies based in Brisbane, Australia36
- Security consultant companies based in Seattle, United States36
- Security consultant companies based in Arlington, United States34
- Security consultant companies based in Charlotte, United States33
- Security consultant companies based in San Diego, United States31
- Security consultant companies based in Boston, United States30
- Security consultant companies based in Ahmedabad, India29
- Security consultant companies based in Phoenix, United States29
- Security consultant companies based in Vancouver, Canada28
- Security consultant companies based in Raleigh, United States27
- Security consultant companies based in Reston, United States27
- Security consultant companies based in Minneapolis, United States26
- Security consultant companies based in San Antonio, United States26
- Security consultant companies based in Belo Horizonte, Brazil25
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 consultant 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 security consultant companies are there worldwide?
RevenueBase identified 15,767 security consultant 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?
Private Sector, headquartered in Worldwide, tops this list with the largest team on record.
Which country has the most security consultant companies?
The United States leads with 3,888 companies, followed by the United Kingdom (1,044) and India (731). Every security consultant companies list by country and city is linked on this page.
Which city has the most security consultant companies?
London leads with 373 headquartered companies, followed by Sao Paulo (185) and Paris (140).
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 43,854 verified decision-maker contacts tracked across these 15,767 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.