Company lists · Data refreshed September 2026

Top 25 Cybersecurity and physical security firms based in New York, United States

RevenueBase identified 244 company matches for cybersecurity and physical security firms associated with New York, United States as of September 2026 and tracks 5,418 professional contacts across them, including 1,466 with verified work emails. Across the United States, New York is the largest hub for this category.

This list covers company matches for cybersecurity and physical security firms 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 September 28, 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 28, 2026 How this list was built
244Companies
5,418Contacts tracked
1,466Verified emails
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The 25 largest cybersecurity and physical security firms based in New York, United States

Ranked by team size
Top 25 of 244 company matches for cybersecurity and physical security firms based in New York, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026501-1,000725 contacts →

Exact match

“Claroty has redefined cyber-physical systems (CPS) protection with an unrivaled industry-centric platform built to secure mission-critical infrastructure.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202610001+571 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 · Sep 28, 2026 · View company records in RevenueBase
3Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026201-500206 contacts →

Exact match

“Since 1969, thousands of businesses across the country have entrusted their protection to DGA Security.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026501-1,000206 contacts →

Exact match

“Stroz Friedberg is now LevelBlue, the world's largest pure-play Managed Security Services Provider (MSSP).”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026201-500200 contacts →

Exact match

“Agio is a hybrid cybersecurity and managed IT organization that combines predictive intelligence with human brilliance to empower clients with next-generation cyber protection and…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026501-1,000190 contacts →

Exact match

“We've merged with Mulligan Security!”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026201-500163 contacts →

Exact match

“Harbor IT helps organizations secure, operate, and scale through integrated IT, cybersecurity, AI, and cloud services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026501-1,000159 contacts →

Exact match

“Silverseal is a comprehensive security solutions firm with worldwide affiliations that can provide global security services in a highly professional manner.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026501-1,000120 contacts →

Exact match

“Excel Security Corp.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202651-200104 contacts →

Exact match

“We empower organizations with resilient, self-healing capabilities that prevent and neutralize even the most advanced cyber threats.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202651-20094 contacts →

Exact match

“Since 2012, Trail of Bits has been the premier place for security experts to boldly advance security and address technology’s newest and most challenging risks.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchNew York, United StatesHQ recorded Sep 28, 2026501-1,00082 contacts →

Exact match

“For over 30 years GMSC has been securing high profile buildings and offices across New York and Chicago.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202611-5080 contacts →

Exact match

“Cyber City inc.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202651-20077 contacts →

Exact match

“TorchStone is a discreet risk mitigation and security advisory firm serving the unique needs of the world’s leading organizations and individuals.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202651-20076 contacts →

Exact match

“NopalCyber makes cybersecurity manageable, affordable, reliable, and powerful for companies that need to be resilient and compliant.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202611-5072 contacts →

Exact match

“ADR Security is the leading provider of electronic and physical security services to some of New York's largest residential real estate portfolios.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026201-50070 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 · Sep 28, 2026 · View company records in RevenueBase
18Exact matchNew York, NY, United StatesHQ recorded Sep 28, 2026n/a66 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202651-20065 contacts →

Exact match

“RevelSI is a global cybersecurity, AI, software, and infrastructure services organization.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchNew York, NY, United StatesHQ recorded Sep 28, 20261,001-5,00060 contacts →

Exact match

“A&H Security Services, is a certified NYC MBE security services provider who makes a difference in our community.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202651-20058 contacts →

Exact match

“Altourage is a New York City-based managed IT and cybersecurity provider built for organizations that operate in high-stakes, fast-moving environments.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202611-5057 contacts →

Exact match

“nsKnox is a cybersecurity company focused on Corporate Payment Security, founded and led by Alon Cohen, Founder & former CEO of CyberArk (NASDAQ: CYBR).”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202651-20055 contacts →

Exact match

“Port53 Technologies is The Global Leader in Cisco-Based Managed Security Operations, helping organizations modernize and secure their digital environments through advanced…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202651-20054 contacts →

Exact match

“White Wings Technologies is a forward-thinking IT solutions provider, specializing in cloud computing, cybersecurity, managed IT services, and strategic IT consulting.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202611-5053 contacts →

Exact match

“SW24 is a privately-held, premier systems integration company founded by veteran law enforcement professionals and staffed by security industry experts.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 244 cybersecurity and physical security firms based in New York, United States

See the full list, filter by size, metro and specialty, and access 1,466 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cybersecurity and physical security firms based in New York, United States at a glance

As of Sep 28, 2026
27.1%Verified-email coverage
22.2Average contacts per company
11-50Median size (employees)
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
102
11-50
88
51-200
29
201-500
11
501-1,000
9
1,001-5,000
4
10001+
1

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 244 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 “cybersecurity and physical security firms” 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 1,466 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 28, 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.

Cybersecurity and physical security firms 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 “cybersecurity and physical security firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity and physical security firms are there based in New York, United States?

RevenueBase identified 244 company matches for cybersecurity and physical security firms associated with New York, 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?

Claroty 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 cybersecurity and physical security firms?

New York leads the United States with 261 company records, followed by Houston (153) and Miami (141).

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 1,466 professional contacts with verified work emails tracked across these 244 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 28, 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.