Company lists · Data refreshed September 2026
Top 25 Private security companies based in the United States
RevenueBase identified 3,308 company matches for private security companies associated with the United States as of September 2026 and tracks 209,591 professional contacts across them, including 18,769 with verified work emails and 61,890 with mobile numbers. New York is the largest hub.
This list covers company matches for private 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 5, 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.
The 25 largest private security companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 62,804 contacts → | ||||
Exact match “Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 2 | 38,634 contacts → | ||||
Exact match “Securitas knows Security.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 3 | 4,038 contacts → | ||||
Exact match “Excelsior Defense is a security and investigations company based out of St.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 4 | 3,612 contacts → | ||||
Exact match “EVERYWHERE SECURITY MATTERS.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 5 | 3,592 contacts → | ||||
Exact match “U.S.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 6 | 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 5, 2026 · View company records in RevenueBase | |||||
| 7 | 2,266 contacts → | ||||
Exact match “Andy Frain Services.America's leading provider of integrated solutions to security and events needs for over 90 years.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 8 | 2,174 contacts → | ||||
Exact match “Through an ISO® 9001:2015 Certified Quality Management System (QMS), Walden Security has earned an award-winning reputation for business excellence and employee satisfaction…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 9 | 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 5, 2026 · View company records in RevenueBase | |||||
| 10 | 1,781 contacts → | ||||
Exact match “Whelan’s commitment to quality and service has made us one of the foremost respected, successful and fastest growing companies in the industry.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 11 | 1,727 contacts → | ||||
Exact match “HSS is now Tarian!” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 12 | 1,639 contacts → | ||||
Exact match “Sunstates Security, LLC is one of the industry's leading providers of contract security services with a differentiated approach to providing successful, cost-effective, quality…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 13 | 1,441 contacts → | ||||
Exact match “Admiral Security Services provides professional armed and unarmed uniformed security officers, unparalleled site management and unwavering corporate support that exceeds client…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 14 | 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 5, 2026 · View company records in RevenueBase | |||||
| 15 | 1,375 contacts → | ||||
Exact match “Guardsmark, LLC provides security services.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 16 | 1,297 contacts → | ||||
Exact match “More than a provider, we’re an active partner.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 17 | 1,190 contacts → | ||||
Exact match “DSI Security Services offers armed and unarmed uniformed security guard services.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 18 | 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 5, 2026 · View company records in RevenueBase | |||||
| 19 | 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 5, 2026 · View company records in RevenueBase | |||||
| 20 | 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 5, 2026 · View company records in RevenueBase | |||||
| 21 | 1,062 contacts → | ||||
Exact match “Founded in 1982, St.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 22 | 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 5, 2026 · View company records in RevenueBase | |||||
| 23 | 981 contacts → | ||||
Exact match “US Security Association Inc is a law enforcement company based out of 2914 E 32nd St, Joplin, Missouri, United States.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 24 | 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 5, 2026 · View company records in RevenueBase | |||||
| 25 | 839 contacts → | ||||
Exact match “Arrow Security stands as one of the nation's largest privately held security guard companies.” Recorded in the RevenueBase company graph · Sep 5, 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 “private 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 3,308 private security companies based in the United States
See the full list, filter by size, metro and specialty, and access 18,769 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Private security companies based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 “private 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 18,769 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 5, 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.
Private security companies by metro
- Private security companies in New York116
- Private security companies in Los Angeles109
- Private security companies in Houston88
- Private security companies in Miami62
- Private security companies in Chicago53
- Private security companies in Atlanta50
- Private security companies in Dallas50
- Private security companies in Austin39
- Private security companies in Las Vegas37
- Private security companies in Phoenix34
- Private security companies in Denver26
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 “private security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many private security companies are there based in the United States?
RevenueBase identified 3,308 company matches for private 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?
Allied Universal tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most private security companies?
New York leads with 116 company records, followed by Los Angeles (109) and Houston (88).
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 18,769 professional contacts with verified work emails tracked across these 3,308 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 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 3,308 private security companies based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Private security companies by geography
- Private security companies based in the United Kingdom
- Private security companies based in France
- Private security companies based in Brazil
- Private security companies based in Germany
- Private security companies based in Canada
- Private security companies based in the Netherlands
- Private security companies based in Italy
- Private security companies based in Australia
- Private security companies based in South Africa
- Private security companies based in Mexico
- Private security companies based in Spain
- Private security companies based in Argentina
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Private security companies based in the United Kingdom
- Private security companies based in France
- Private security companies based in Brazil
- Private security companies based in Germany
- Private security companies based in Canada
- Private security companies based in the Netherlands
Company intelligence · public preview
Top 25 private security companies based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 3,308 matching company records for private security companies based in the United States, with 209,591 tracked contacts and 18,769 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 private security companies based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Allied Universalaus.comHQ: Irvine, CA, United StatesReported employees: 10001+ | Irvine, CA, United States | 10001+ | Exact match | 62,804 contacts → |
“Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Securitas Security Services Usa, INCsecuritasinc.comHQ: Parsippany, NJ, United StatesReported employees: 10001+ | Parsippany, NJ, United States | 10001+ | Exact match | 38,634 contacts → |
“Securitas knows Security.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Unemployedexcelsiordefense.com HQ: St. Petersburg, FL, United StatesReported employees: Not recorded | St. Petersburg, FL, United States | Not recorded | Exact match | 4,038 contacts → |
“Excelsior Defense is a security and investigations company based out of St.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Inter-Con Securityicsecurity.comHQ: Pasadena, CA, United StatesReported employees: 10001+ | Pasadena, CA, United States | 10001+ | Exact match | 3,612 contacts → |
“EVERYWHERE SECURITY MATTERS.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  U.S. Security Associates, INCussecurityassociates.comHQ: Roswell, GA, United StatesReported employees: 10001+ | Roswell, GA, United States | 10001+ | Exact match | 3,592 contacts → |
“U.S.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HQ: Culver City, CA, United StatesReported employees: 5,001-10,000 | Culver City, CA, United States | 5,001-10,000 | Exact match | 2,500 contacts → |
“The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Andy Frain Servicesandyfrain.comHQ: Aurora, IL, United StatesReported employees: 5,001-10,000 | Aurora, IL, United States | 5,001-10,000 | Exact match | 2,266 contacts → |
“Andy Frain Services.America's leading provider of integrated solutions to security and events needs for over 90 years.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Walden Securitywaldensecurity.comHQ: Chattanooga, TN, United StatesReported employees: 5,001-10,000 | Chattanooga, TN, United States | 5,001-10,000 | Exact match | 2,174 contacts → |
“Through an ISO® 9001:2015 Certified Quality Management System (QMS), Walden Security has earned an award-winning reputation for business excellence and employee satisfaction…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Paragon Systems INCparasys.comHQ: Herndon, VA, United StatesReported employees: 10001+ | Herndon, VA, United States | 10001+ | Exact match | 1,949 contacts → |
“Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Whelan Securitywhelansecurity.comHQ: St. Louis, MO, United StatesReported employees: 5,001-10,000 | St. Louis, MO, United States | 5,001-10,000 | Exact match | 1,781 contacts → |
“Whelan’s commitment to quality and service has made us one of the foremost respected, successful and fastest growing companies in the industry.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  HSStariangroup.comHQ: Denver, CO, United StatesReported employees: 5,001-10,000 | Denver, CO, United States | 5,001-10,000 | Exact match | 1,727 contacts → |
“HSS is now Tarian!” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Sunstates Securitysunstatessecurity.comHQ: Raleigh, NC, United StatesReported employees: 5,001-10,000 | Raleigh, NC, United States | 5,001-10,000 | Exact match | 1,639 contacts → |
“Sunstates Security, LLC is one of the industry's leading providers of contract security services with a differentiated approach to providing successful, cost-effective, quality…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Admiral Security Servicesadmiralsecurity.comHQ: Bethesda, MD, United StatesReported employees: 5,001-10,000 | Bethesda, MD, United States | 5,001-10,000 | Exact match | 1,441 contacts → |
“Admiral Security Services provides professional armed and unarmed uniformed security officers, unparalleled site management and unwavering corporate support that exceeds client…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Weiser Security Services, INCweisersecurity.comHQ: New Orleans, LA, United StatesReported employees: 1,001-5,000 | New Orleans, LA, United States | 1,001-5,000 | Exact match | 1,399 contacts → |
“Weiser Security Services is the 11th largest security service provider in the U.S.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Guardsmarkguardsmark.comHQ: New York, NY, United StatesReported employees: 10001+ | New York, NY, United States | 10001+ | Exact match | 1,375 contacts → |
“Guardsmark, LLC provides security services.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Signalteamsignal.comHQ: Omaha, NE, United StatesReported employees: 1,001-5,000 | Omaha, NE, United States | 1,001-5,000 | Exact match | 1,297 contacts → |
“More than a provider, we’re an active partner.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  DSI Security Servicesdsisecurity.comHQ: Dothan, AL, United StatesReported employees: 1,001-5,000 | Dothan, AL, United States | 1,001-5,000 | Exact match | 1,190 contacts → |
“DSI Security Services offers armed and unarmed uniformed security guard services.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  SOS Security LLCsossecurity.comHQ: Parsippany, NJ, United StatesReported employees: 10001+ | Parsippany, NJ, United States | 10001+ | Exact match | 1,151 contacts → |
“SOS Security is a known innovator and leader in the security and protective services industry.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Titan Security Grouptitan-security.comHQ: Chicago, IL, United StatesReported employees: 1,001-5,000 | Chicago, IL, United States | 1,001-5,000 | Exact match | 1,138 contacts → |
“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 description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  PER MAR Security Servicespermarsecurity.comHQ: Davenport, IA, United StatesReported employees: 1,001-5,000 | Davenport, IA, United States | 1,001-5,000 | Exact match | 1,120 contacts → |
“Per Mar Security Services is the largest full-service security solutions provider in the Midwest.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  St. Moritz Security Services, INCsmssi.comHQ: Pittsburgh, PA, United StatesReported employees: 5,001-10,000 | Pittsburgh, PA, United States | 5,001-10,000 | Exact match | 1,062 contacts → |
“Founded in 1982, St.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Brosnan Risk Consultantsbrosnanrisk.comHQ: Pearl River, NY, United StatesReported employees: 5,001-10,000 | Pearl River, NY, United States | 5,001-10,000 | Exact match | 1,050 contacts → |
“Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | US Security Association INCfinancemanager.us HQ: Joplin, MO, United StatesReported employees: Not recorded | Joplin, MO, United States | Not recorded | Exact match | 981 contacts → |
“US Security Association Inc is a law enforcement company based out of 2914 E 32nd St, Joplin, Missouri, United States.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  First Coast Securityfcssecurity.usHQ: Jacksonville, FL, United StatesReported employees: 5,001-10,000 | Jacksonville, FL, United States | 5,001-10,000 | Exact match | 932 contacts → |
“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 description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Arrow Securityarrowsecurity.comHQ: Smithtown, MA, United StatesReported employees: 5,001-10,000 | Smithtown, MA, United States | 5,001-10,000 | Exact match | 839 contacts → |
“Arrow Security stands as one of the nation's largest privately held security guard companies.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 3,308 company matches
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Private security companies: dataset insights
September 5, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
3,295 records in the displayed employee bands.
13 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Private security companies by metro
- Private security companies in New York116
- Private security companies in Los Angeles109
- Private security companies in Houston88
- Private security companies in Miami62
- Private security companies in Chicago53
- Private security companies in Atlanta50
- Private security companies in Dallas50
- Private security companies in Austin39
- Private security companies in Las Vegas37
- Private security companies in Phoenix34
- Private security companies in Denver26
Questions about this company list
What does Exact match mean for private security companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many private security companies did RevenueBase find based in the United States?
The saved snapshot records 3,308 matching company records, 209,591 tracked contacts and 18,769 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Private security companies by geography
- Private security companies based in the United Kingdom
- Private security companies based in France
- Private security companies based in Brazil
- Private security companies based in Germany
- Private security companies based in Canada
- Private security companies based in the Netherlands
- Private security companies based in Italy
- Private security companies based in Australia
- Private security companies based in South Africa
- Private security companies based in Mexico
- Private security companies based in Spain
- Private security companies based in Argentina
Cite this list
RevenueBase Data Team. Top 25 private security companies based in the United States. Snapshot: September 5, 2026. https://revenuebase.ai/companies/private-security-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Private security companies based in the United Kingdom
- Private security companies based in France
- Private security companies based in Brazil
- Private security companies based in Germany
- Private security companies based in Canada
- Private security companies based in the Netherlands
Company intelligence · public preview
Top 25 private security companies based in the United States
RevenueBase records 3,308 matching company records for private security companies based in the United States, with 209,591 tracked contacts and 18,769 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 private security companies based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Allied Universalaus.com HQ: Irvine, CA, United StatesReported employees: 10001+ | Irvine, CA, United States | 10001+ | Exact match | 62,804 contacts → |
“Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Securitas Security Services Usa, INCsecuritasinc.com HQ: Parsippany, NJ, United StatesReported employees: 10001+ | Parsippany, NJ, United States | 10001+ | Exact match | 38,634 contacts → |
“Securitas knows Security.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Unemployedexcelsiordefense.com HQ: St. Petersburg, FL, United StatesReported employees: Not recorded | St. Petersburg, FL, United States | Not recorded | Exact match | 4,038 contacts → |
“Excelsior Defense is a security and investigations company based out of St.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Inter-Con Securityicsecurity.com HQ: Pasadena, CA, United StatesReported employees: 10001+ | Pasadena, CA, United States | 10001+ | Exact match | 3,612 contacts → |
“EVERYWHERE SECURITY MATTERS.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | U.S. Security Associates, INCussecurityassociates.com HQ: Roswell, GA, United StatesReported employees: 10001+ | Roswell, GA, United States | 10001+ | Exact match | 3,592 contacts → |
“U.S.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HQ: Culver City, CA, United StatesReported employees: 5,001-10,000 | Culver City, CA, United States | 5,001-10,000 | Exact match | 2,500 contacts → |
“The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Andy Frain Servicesandyfrain.com HQ: Aurora, IL, United StatesReported employees: 5,001-10,000 | Aurora, IL, United States | 5,001-10,000 | Exact match | 2,266 contacts → |
“Andy Frain Services.America's leading provider of integrated solutions to security and events needs for over 90 years.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Walden Securitywaldensecurity.com HQ: Chattanooga, TN, United StatesReported employees: 5,001-10,000 | Chattanooga, TN, United States | 5,001-10,000 | Exact match | 2,174 contacts → |
“Through an ISO® 9001:2015 Certified Quality Management System (QMS), Walden Security has earned an award-winning reputation for business excellence and employee satisfaction…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Paragon Systems INCparasys.com HQ: Herndon, VA, United StatesReported employees: 10001+ | Herndon, VA, United States | 10001+ | Exact match | 1,949 contacts → |
“Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Whelan Securitywhelansecurity.com HQ: St. Louis, MO, United StatesReported employees: 5,001-10,000 | St. Louis, MO, United States | 5,001-10,000 | Exact match | 1,781 contacts → |
“Whelan’s commitment to quality and service has made us one of the foremost respected, successful and fastest growing companies in the industry.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | HSStariangroup.com HQ: Denver, CO, United StatesReported employees: 5,001-10,000 | Denver, CO, United States | 5,001-10,000 | Exact match | 1,727 contacts → |
“HSS is now Tarian!” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Sunstates Securitysunstatessecurity.com HQ: Raleigh, NC, United StatesReported employees: 5,001-10,000 | Raleigh, NC, United States | 5,001-10,000 | Exact match | 1,639 contacts → |
“Sunstates Security, LLC is one of the industry's leading providers of contract security services with a differentiated approach to providing successful, cost-effective, quality…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Admiral Security Servicesadmiralsecurity.com HQ: Bethesda, MD, United StatesReported employees: 5,001-10,000 | Bethesda, MD, United States | 5,001-10,000 | Exact match | 1,441 contacts → |
“Admiral Security Services provides professional armed and unarmed uniformed security officers, unparalleled site management and unwavering corporate support that exceeds client…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Weiser Security Services, INCweisersecurity.com HQ: New Orleans, LA, United StatesReported employees: 1,001-5,000 | New Orleans, LA, United States | 1,001-5,000 | Exact match | 1,399 contacts → |
“Weiser Security Services is the 11th largest security service provider in the U.S.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Guardsmarkguardsmark.com HQ: New York, NY, United StatesReported employees: 10001+ | New York, NY, United States | 10001+ | Exact match | 1,375 contacts → |
“Guardsmark, LLC provides security services.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Signalteamsignal.com HQ: Omaha, NE, United StatesReported employees: 1,001-5,000 | Omaha, NE, United States | 1,001-5,000 | Exact match | 1,297 contacts → |
“More than a provider, we’re an active partner.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | DSI Security Servicesdsisecurity.com HQ: Dothan, AL, United StatesReported employees: 1,001-5,000 | Dothan, AL, United States | 1,001-5,000 | Exact match | 1,190 contacts → |
“DSI Security Services offers armed and unarmed uniformed security guard services.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | SOS Security LLCsossecurity.com HQ: Parsippany, NJ, United StatesReported employees: 10001+ | Parsippany, NJ, United States | 10001+ | Exact match | 1,151 contacts → |
“SOS Security is a known innovator and leader in the security and protective services industry.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Titan Security Grouptitan-security.com HQ: Chicago, IL, United StatesReported employees: 1,001-5,000 | Chicago, IL, United States | 1,001-5,000 | Exact match | 1,138 contacts → |
“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 description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | PER MAR Security Servicespermarsecurity.com HQ: Davenport, IA, United StatesReported employees: 1,001-5,000 | Davenport, IA, United States | 1,001-5,000 | Exact match | 1,120 contacts → |
“Per Mar Security Services is the largest full-service security solutions provider in the Midwest.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | St. Moritz Security Services, INCsmssi.com HQ: Pittsburgh, PA, United StatesReported employees: 5,001-10,000 | Pittsburgh, PA, United States | 5,001-10,000 | Exact match | 1,062 contacts → |
“Founded in 1982, St.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Brosnan Risk Consultantsbrosnanrisk.com HQ: Pearl River, NY, United StatesReported employees: 5,001-10,000 | Pearl River, NY, United States | 5,001-10,000 | Exact match | 1,050 contacts → |
“Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | US Security Association INCfinancemanager.us HQ: Joplin, MO, United StatesReported employees: Not recorded | Joplin, MO, United States | Not recorded | Exact match | 981 contacts → |
“US Security Association Inc is a law enforcement company based out of 2914 E 32nd St, Joplin, Missouri, United States.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | First Coast Securityfcssecurity.us HQ: Jacksonville, FL, United StatesReported employees: 5,001-10,000 | Jacksonville, FL, United States | 5,001-10,000 | Exact match | 932 contacts → |
“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 description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Arrow Securityarrowsecurity.com HQ: Smithtown, MA, United StatesReported employees: 5,001-10,000 | Smithtown, MA, United States | 5,001-10,000 | Exact match | 839 contacts → |
“Arrow Security stands as one of the nation's largest privately held security guard companies.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 3,308 company matches
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Private security companies: dataset insights
September 5, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
3,295 records in the displayed employee bands.
13 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Private security companies by metro
- Private security companies in New York116
- Private security companies in Los Angeles109
- Private security companies in Houston88
- Private security companies in Miami62
- Private security companies in Chicago53
- Private security companies in Atlanta50
- Private security companies in Dallas50
- Private security companies in Austin39
- Private security companies in Las Vegas37
- Private security companies in Phoenix34
- Private security companies in Denver26
Questions about this company list
What does Exact match mean for private security companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many private security companies did RevenueBase find based in the United States?
The saved snapshot records 3,308 matching company records, 209,591 tracked contacts and 18,769 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Private security companies by geography
- Private security companies based in the United Kingdom
- Private security companies based in France
- Private security companies based in Brazil
- Private security companies based in Germany
- Private security companies based in Canada
- Private security companies based in the Netherlands
- Private security companies based in Italy
- Private security companies based in Australia
- Private security companies based in South Africa
- Private security companies based in Mexico
- Private security companies based in Spain
- Private security companies based in Argentina
Cite this list
RevenueBase Data Team. Top 25 private security companies based in the United States. Snapshot: September 5, 2026. https://revenuebase.ai/companies/private-security-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Private security companies based in the United Kingdom
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- Private security companies based in the Netherlands