Company lists · Data refreshed September 2026

Top 25 Top 10 security companies based in the United States

Name: Top 10 security companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 5,168 companies tracked

RevenueBase identified 5,168 company matches for top 10 security companies associated with the United States as of September 2026 and tracks 161,073 professional contacts across them, including 26,489 with verified work emails. New York is the largest hub.

This list covers company matches for top 10 security companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built

5,168Companies

161,073Contacts tracked

26,489Verified emails

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The 25 largest top 10 security companies based in the United States

Ranked by team size

Top 25 of 5,168 company matches for top 10 security companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Securitas Security Services Usa, INC	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 21, 2026	10001+	38,634 contacts →
	Exact match “Securitas knows Security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Alliedbarton Security Services	Exact match	Santa Ana, United StatesHQ recorded Sep 21, 2026	10001+	4,358 contacts →
	Exact match “We've merged!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Unemployed	Exact match	St. Petersburg, FL, United StatesHQ recorded Sep 21, 2026	n/a	4,038 contacts →
	Exact match “Excelsior Defense is a security and investigations company based out of St.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	U.S. Security Associates, INC	Exact match	Roswell, GA, United StatesHQ recorded Sep 21, 2026	10001+	3,592 contacts →
	Exact match “U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Security Industry Specialists	Exact match	Culver City, CA, United StatesHQ recorded Sep 21, 2026	5,001-10,000	2,500 contacts →
	Exact match “The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,222 contacts →
	Exact match “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Crisis24	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,025 contacts →
	Exact match “Crisis24, a GardaWorld company, is widely regarded as the leading integrated risk management, crisis response, consulting, and global protective solutions firm, serving the…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Pinkerton Comprehensive Risk Management	Exact match	Ann Arbor, MI, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,022 contacts →
	Exact match “Pinkerton, established in 1850 by Allan Pinkerton, stands as a leading global provider of security and risk management solutions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Sep 21, 2026	10001+	1,949 contacts →
	Exact match “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	HSS	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	5,001-10,000	1,727 contacts →
	Exact match “HSS is now Tarian!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Weiser Security Services, INC	Exact match	New Orleans, LA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,399 contacts →
	Exact match “Weiser Security Services is the 11th largest security service provider in the U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Guardsmark	Exact match	New York, NY, United StatesHQ recorded Sep 21, 2026	10001+	1,375 contacts →
	Exact match “Guardsmark, LLC provides security services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Thales Cybersecurity Products	Exact match	Austin, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,252 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,232 contacts →
	Exact match “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	SOS Security LLC	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 21, 2026	10001+	1,151 contacts →
	Exact match “SOS Security is a known innovator and leader in the security and protective services industry.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Titan Security Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,138 contacts →
	Exact match “At Titan Security Group, we understand that each client is unique, with specific security needs shaped by the type of property and its location.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	PER MAR Security Services	Exact match	Davenport, IA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,120 contacts →
	Exact match “Per Mar Security Services is the largest full-service security solutions provider in the Midwest.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Andrews International	Exact match	Burbank, CA, United StatesHQ recorded Sep 21, 2026	10001+	1,081 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	St. Moritz Security Services, INC	Exact match	Pittsburgh, PA, United StatesHQ recorded Sep 21, 2026	5,001-10,000	1,062 contacts →
	Exact match “Founded in 1982, St.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Brosnan Risk Consultants	Exact match	Pearl River, NY, United StatesHQ recorded Sep 21, 2026	5,001-10,000	1,050 contacts →
	Exact match “Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	First Coast Security	Exact match	Jacksonville, FL, United StatesHQ recorded Sep 21, 2026	5,001-10,000	932 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Zerofox	Exact match	Baltimore, MD, United StatesHQ recorded Sep 21, 2026	501-1,000	904 contacts →
	Exact match “ZeroFox is the solution to discover, validate, and disrupt external cyber threats before they harm revenue or reputation.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Trustwave, A Levelblue Company	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	501-1,000	874 contacts →
	Exact match “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Securamerica	Exact match	Atlanta, GA, United StatesHQ recorded Sep 21, 2026	5,001-10,000	782 contacts →
	Exact match “Now part of Allied Universal.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Northeast Security INC	Exact match	Westwood, MA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	748 contacts →
	Exact match “Improving Security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “top 10 security companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 5,168 top 10 security companies based in the United States

See the full list, filter by size, metro and specialty, and access 26,489 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Top 10 security companies based in the United States at a glance

As of Sep 21, 2026

16.4%Verified-email coverage

31.2Average contacts per company

11-50Median size (employees)

3.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

2,389

11-50

1,652

51-200

708

201-500

222

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 5,168 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “top 10 security companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 26,489 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Top 10 security companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “top 10 security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many top 10 security companies are there based in the United States?

RevenueBase identified 5,168 company matches for top 10 security companies associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Securitas Security Services Usa, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most top 10 security companies?

New York leads with 154 company records, followed by Houston (105) and Los Angeles (103).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 26,489 professional contacts with verified work emails tracked across these 5,168 companies; direct dials are available where recorded.

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 SmartSearch, 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.