Company lists · Data refreshed November 2026

Top 21 Intelligence and security services based in New York, United States

Name: Intelligence and security services based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 127 companies tracked

RevenueBase identified 127 company matches for intelligence and security services associated with New York, United States as of November 2026 and tracks 7,884 professional contacts across them, including 1,326 with verified work emails. Across the United States, New York is the largest hub for this category.

This list covers company matches for intelligence and security services associated with New York, 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 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built

127Companies

7,884Contacts tracked

1,326Verified emails

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The 21 largest intelligence and security services based in New York, United States

Ranked by team size

Top 21 of 127 company matches for intelligence and security services based in New York, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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	Guardsmark	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	10001+	1,562 contacts →
	Exact match “Guardsmark, LLC provides security services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	MSA Security	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	10001+	585 contacts →
	Exact match “Allied Universal Enhanced Protection Services delivers unrivaled threat mitigation expertise for government and business entities worldwide.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	Vcheck	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	201-500	367 contacts →
	Exact match “Vcheck is a global investigations firm that helps institutions protect their investments by providing intelligence on individuals and entities.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	Harvard Protection Services, LLC	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	501-1,000	338 contacts →
	Exact match “Harvard Protection Services is one of the nation’s premier security firms.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	Flashpoint	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	201-500	269 contacts →
	Exact match “Flashpoint is the leader in threat data and intelligence.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	T&m Usa, LLC	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	201-500	224 contacts →
	Exact match “T&M USA provides seamlessly integrated executive protection, investigative and consulting services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Nardello & CO	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	51-200	121 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Excel Security Corporation	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	501-1,000	120 contacts →
	Exact match “Excel Security Corp.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	ERGO	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	11-50	99 contacts →
	Exact match “Ergo is a global intelligence and advisory firm trusted by the world’s leading investors, multinationals, and governments.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	GSS Security Services,inc	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	201-500	79 contacts →
	Exact match “Personal security services are paramount in the current economic and political climate and GSS Security Services, Inc.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	City Safe Partners	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	201-500	78 contacts →
	Exact match “At CITY SAFE PARTNERS SECURITY, we create solutions and put systems in place to ensure that people and businesses are secure.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Global OPS	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	201-500	70 contacts →
	Exact match “At GLOBAL OPS, we specialize in creating and implementing tailored security solutions that cater to the unique needs of our diverse clientele.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Insite Risk Management	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	51-200	62 contacts →
	Exact match “Effective risk management requires a holistic process.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Knight Security NY	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	51-200	35 contacts →
	Exact match “SECURITY.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	The Soufan Group TSG	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	11-50	25 contacts →
	Exact match “The Soufan Group (TSG) is a global intelligence and security consultancy that helps clients in the public and private sectors enhance their ability to identify and assess national…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	SI Global Partners	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	11-50	23 contacts →
	Exact match “SI Global Partners is an independent global investigation and security consulting firm founded in 2021.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Global Data Risk LLC	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	51-200	21 contacts →
	Exact match “Founded in 2022 and headquartered in the historic financial core of New York, Global Data Risk LLC (GDR) is an independent investigative consulting firm focused on risk in the…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	Unit 221b	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	11-50	20 contacts →
	Exact match “Unit 221B is a threat disruption company delivering actionable threat intelligence and cybersecurity solutions that enable enterprises, law enforcement, and government agencies to…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	The Arkin Group LLC	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	11-50	19 contacts →
	Exact match “The Arkin Group (TAG) delivers strategic intelligence that turns global complexity into competitive advantage.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Ddcues LLC	Exact match	New York, United StatesHQ recorded Nov 5, 2026	51-200	18 contacts →
	Exact match “DDCues is a national risk management firm committed to protecting people, securing infrastructure, and defending the Nation.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Narrowgate Security Agency	Exact match	New York, United StatesHQ recorded Nov 5, 2026	1,001-5,000	18 contacts →
	Exact match “We provide analysis and design of Physical Security Systems (PSS) of high risk facilities and critical infrastructure.” Recorded in the RevenueBase company graph · Nov 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 “intelligence and security 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 21 of 127 intelligence and security services based in New York, United States

See the full list, filter by size, metro and specialty, and access 1,326 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Intelligence and security services based in New York, United States at a glance

As of Nov 5, 2026

16.8%Verified-email coverage

62.1Average contacts per company

11-50Median size (employees)

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 127 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 New York, United States whose business descriptions match “intelligence and security 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 1,326 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 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.

Intelligence and security services by metro in the United States

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 “intelligence and security services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many intelligence and security services are there based in New York, United States?

RevenueBase identified 127 company matches for intelligence and security services associated with New York, 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?

Guardsmark tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most intelligence and security services?

New York leads the United States with 127 company records, followed by Washington (84) and Houston (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 1,326 professional contacts with verified work emails tracked across these 127 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 5, 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.