Company lists · Data refreshed November 2026

Top 25 Infrastructure protection services based in the United States

Name: Infrastructure protection services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 3,845 companies tracked

RevenueBase identified 3,845 company matches for infrastructure protection services associated with the United States as of November 2026 and tracks 207,712 professional contacts across them, including 33,334 with verified work emails. New York is the largest hub.

This list covers company matches for infrastructure protection services 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 November 6, 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 Nov 6, 2026 How this list was built

3,845Companies

207,712Contacts tracked

33,334Verified emails

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The 25 largest infrastructure protection services based in the United States

Ranked by team size

Top 25 of 3,845 company matches for infrastructure protection services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	Allied Universal	Exact match	Irvine, IL, United StatesHQ recorded Nov 6, 2026	10001+	66,203 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 · Nov 6, 2026 · View company records in RevenueBase
2	Securitas Security Services Usa, INC	Exact match	Parsippany, MI, United StatesHQ recorded Nov 6, 2026	10001+	40,551 contacts →
	Exact match “Securitas knows Security.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Convergint	Exact match	Hoffman Estates, IL, United StatesHQ recorded Nov 6, 2026	10001+	6,031 contacts →
	Exact match “Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	U.S. Security Associates, INC	Exact match	Roswell, UT, United StatesHQ recorded Nov 6, 2026	10001+	4,263 contacts →
	Exact match “U.S.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Unemployed	Exact match	St. Petersburg, FL, United StatesHQ recorded Nov 6, 2026	n/a	4,040 contacts →
	Exact match “Excelsior Defense is a security and investigations company based out of St.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Everon	Exact match	Irving, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,178 contacts →
	Exact match “Everon is a leading national provider of commercial security, video, fire, sprinkler, and life safety solutions for complex, multi-site businesses and organizations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,171 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 · Nov 6, 2026 · View company records in RevenueBase
8	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Nov 6, 2026	10001+	1,928 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 · Nov 6, 2026 · View company records in RevenueBase
9	HSS	Exact match	Denver, CO, United StatesHQ recorded Nov 6, 2026	5,001-10,000	1,811 contacts →
	Exact match “HSS is now Tarian!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Guardsmark	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	10001+	1,562 contacts →
	Exact match “Guardsmark, LLC provides security services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,346 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 · Nov 6, 2026 · View company records in RevenueBase
12	SOS Security LLC	Exact match	Parsippany, VA, United StatesHQ recorded Nov 6, 2026	10001+	1,203 contacts →
	Exact match “SOS Security is a known innovator and leader in the security and protective services industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Securitas Critical Infrastructure Services, INC	Exact match	Herndon, VA, United StatesHQ recorded Nov 6, 2026	10001+	1,186 contacts →
	Exact match “Securitas Critical Infrastructure Services, Inc.(SCIS) is a provider of specialized security and fire services to the highly regulated Nuclear, Aerospace, Defense, Energy, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	St. Moritz Security Services, INC	Exact match	Pittsburgh, PA, United StatesHQ recorded Nov 6, 2026	5,001-10,000	1,168 contacts →
	Exact match “Founded in 1982, St.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Brosnan Risk Consultants	Exact match	Pearl River, CA, United StatesHQ recorded Nov 6, 2026	5,001-10,000	1,080 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 · Nov 6, 2026 · View company records in RevenueBase
16	First Coast Security	Exact match	Jacksonville, FL, United StatesHQ recorded Nov 6, 2026	5,001-10,000	1,052 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 · Nov 6, 2026 · View company records in RevenueBase
17	Levelblue	Exact match	Dallas, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	829 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Akal Security	Exact match	Espanola, NM, United StatesHQ recorded Nov 6, 2026	10001+	798 contacts →
	Exact match “Known for our responsiveness, innovation, and customer-focused service, Akal provides officers and specialized training to a broad range of clients.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Northeast Security INC	Exact match	Westwood, MA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	767 contacts →
	Exact match “Improving Security.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Palamerican Security	Exact match	St. Petersburg, CA, United StatesHQ recorded Nov 6, 2026	10001+	725 contacts →
	Exact match “PalAmerican Security is an industry-leading security provider, delivering customized programs across 44 states and employees.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	United Protective Services	Exact match	Dallas, OK, United StatesHQ recorded Nov 6, 2026	1,001-5,000	720 contacts →
	Exact match “UNITED PROTECTIVE SERVICES "Our Edge Is Your Security" United Protective Services is a Southwest based provider of security services unique from traditional security companies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Sallyport Global	Exact match	Reston, VA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	687 contacts →
	Exact match “Sallyport Global a Caliburn company is a global provider of a full spectrum of security and mission support solutions tailored to enable global security and stability operations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Telos Corporation	Exact match	Ashburn, VA, United StatesHQ recorded Nov 6, 2026	501-1,000	676 contacts →
	Exact match “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Dragos, INC	Exact match	Hanover, MD, United StatesHQ recorded Nov 6, 2026	501-1,000	670 contacts →
	Exact match “Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Ultraviolet Cyber	Exact match	Mclean, AZ, United StatesHQ recorded Nov 6, 2026	501-1,000	623 contacts →
	Exact match “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Recorded in the RevenueBase company graph · Nov 6, 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 “infrastructure protection services”. 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 3,845 infrastructure protection services based in the United States

See the full list, filter by size, metro and specialty, and access 33,334 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Infrastructure protection services based in the United States at a glance

As of Nov 6, 2026

16.0%Verified-email coverage

54.0Average contacts per company

11-50Median size (employees)

3.3%Largest-city concentration · New York

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

1,756

11-50

1,239

51-200

548

201-500

146

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 3,845 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 “infrastructure protection services” 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 33,334 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 November 6, 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.

Infrastructure protection services 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 “infrastructure protection services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many infrastructure protection services are there based in the United States?

RevenueBase identified 3,845 company matches for infrastructure protection services associated with the United States as of November 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 infrastructure protection services?

New York leads with 125 company records, followed by Houston (88) and Washington (69).

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 33,334 professional contacts with verified work emails tracked across these 3,845 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 November 6, 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.