Company lists · Data refreshed September 2026
Top 25 Security investigation consultants worldwide
RevenueBase identified 11,104 security investigation consultants worldwide as of September 2026 and tracks 158,705 professional contacts across them, including 21,493 with verified work emails. The United States is the largest market and London the largest hub.
This list covers security investigation consultants 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 29, 2026. Country and city lists for security investigation consultants 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 investigation consultants worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,592 contacts → | ||||
Indirect evidence “U.S.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 3,004 contacts → | ||||
Partial evidence “Securitas is a global knowledge leader in security.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,365 contacts → | ||||
Partial evidence “Founded in 1976, Paragon Security is Ontario’s largest privately owned security company.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,949 contacts → | ||||
Strong 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 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,398 contacts → | ||||
Partial evidence “World Security being a Semi Govt Organization provides specialist turnkey security solutions to the local market and beyond, as well as the Dubai World Group.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,375 contacts → | ||||
Partial evidence “Guardsmark, LLC provides security services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 1,318 contacts → | ||||
Partial evidence “Protectas belongs to the Swedish Securitas AB, the knowledged leader in security (which incidentally is not affiliated with the Swiss company of the same name, Securitas AG).” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1,233 contacts → | ||||
Strong evidence “BANQUE POPULAIRE BOURGOGNE FRANCHE-COM is a Security and Investigations company located in 14 BOULEVARD DE LA TREMOUILLE, DIJON, Burgundy, France.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,151 contacts → | ||||
Partial evidence “SOS Security is a known innovator and leader in the security and protective services industry.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,120 contacts → | ||||
Partial evidence “Per Mar Security Services is the largest full-service security solutions provider in the Midwest.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 1,062 contacts → | ||||
Indirect evidence “Founded in 1982, St.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 994 contacts → | ||||
Partial evidence “Securitas is a global knowledge leader in security.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 981 contacts → | ||||
Partial evidence “US Security Association Inc is a law enforcement company based out of 2914 E 32nd St, Joplin, Missouri, United States.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 932 contacts → | ||||
Indirect evidence “As an established mid-market company, clients throughout the country entrust us as the best-qualified firm to protect their highest-value assets – while delivering the quality…” Source: RevenueBase Database · checked Sep 29, 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 29, 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 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 748 contacts → | ||||
Partial evidence “Improving Security.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 741 contacts → | ||||
Indirect evidence “Known for our responsiveness, innovation, and customer-focused service, Akal provides officers and specialized training to a broad range of clients.” Source: RevenueBase Database · checked Sep 29, 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 investigation consultants. 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 investigation consultants.
- Partial evidence
- Its own public description names part of security investigation consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name security investigation consultants. 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 11,104 security investigation consultants worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 21,493 reachable decision-makers.
Free signup · no credit card
Security investigation consultants worldwide at a glance
As of Sep 29, 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 investigation consultants, 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 investigation consultants are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “security investigation consultants”. 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 investigation consultants), 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 investigation consultants, 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, 21,493 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 29, 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 investigation consultants by location
57 lists · largest firstEvery Security investigation consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Security investigation consultants based in the United States3,368
- Security investigation consultants based in the United Kingdom833
- Security investigation consultants based in India455
- Security investigation consultants based in France417
- Security investigation consultants based in Canada348
- Security investigation consultants based in Brazil346
- Security investigation consultants based in Italy315
- Security investigation consultants based in Australia269
- Security investigation consultants based in Germany259
- Security investigation consultants based in the Netherlands184
- Security investigation consultants based in Mexico172
- Security investigation consultants based in Spain172
- Security investigation consultants based in South Africa138
- Security investigation consultants based in Sweden104
- Security investigation consultants based in the United Arab Emirates96
- Security investigation consultants based in Colombia95
- Security investigation consultants based in Israel91
- Security investigation consultants based in Switzerland89
- Security investigation consultants based in Argentina78
- Security investigation consultants based in Nigeria73
- Security investigation consultants based in Chile63
- Security investigation consultants based in Türkiye62
- Security investigation consultants based in Belgium57
- Security investigation consultants based in Poland56
- Security investigation consultants based in Kenya51
- Security investigation consultants based in New Zealand44
- Security investigation consultants based in Indonesia41
- Security investigation consultants based in Denmark37
- Security investigation consultants based in Austria33
Cities
- Security investigation consultants based in London, United Kingdom265
- Security investigation consultants based in Sao Paulo, Brazil104
- Security investigation consultants based in New York, United States103
- Security investigation consultants based in Paris, France84
- Security investigation consultants based in Houston, United States66
- Security investigation consultants based in Toronto, Canada66
- Security investigation consultants based in Chicago, United States65
- Security investigation consultants based in Melbourne, Australia57
- Security investigation consultants based in Washington, United States56
- Security investigation consultants based in Miami, United States52
- Security investigation consultants based in Los Angeles, United States51
- Security investigation consultants based in Stockholm, Sweden48
- Security investigation consultants based in Atlanta, United States47
- Security investigation consultants based in Dubai, United Arab Emirates47
- Security investigation consultants based in Madrid, Spain47
- Security investigation consultants based in Nairobi, Kenya44
- Security investigation consultants based in Sydney, Australia42
- Security investigation consultants based in Austin, United States41
- Security investigation consultants based in Dallas, United States41
- Security investigation consultants based in Barcelona, Spain33
- Security investigation consultants based in Phoenix, United States30
- Security investigation consultants based in Arlington, United States29
- Security investigation consultants based in Boston, United States29
- Security investigation consultants based in Denver, United States28
- Security investigation consultants based in Ottawa, Canada28
- Security investigation consultants based in Las Vegas, United States27
- Security investigation consultants based in Rio De Janeiro, Brazil27
- Security investigation consultants based in Fort Lauderdale, 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 investigation consultants, 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 investigation consultants are there worldwide?
RevenueBase identified 11,104 security investigation consultants 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?
U.S. Security Associates, INC, headquartered in Roswell, tops this list with the largest team on record.
Which country has the most security investigation consultants?
The United States leads with 3,368 companies, followed by the United Kingdom (833) and India (455). Every security investigation consultants list by country and city is linked on this page.
Which city has the most security investigation consultants?
London leads with 271 headquartered companies, followed by Sao Paulo (104) and New York (103).
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 21,493 verified decision-maker contacts tracked across these 11,104 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 29, 2026.
Ready to reach these companies? Verified emails and direct dials for all 11,104 security investigation consultants 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.