Company lists · Data refreshed September 2026

Top 25 Data center security services based in New York, United States

RevenueBase identified 82 data center security services headquartered in New York, United States as of September 2026 and tracks 3,808 professional contacts across them, including 311 with verified work emails and 1,252 with mobile numbers. New York is the largest hub.

This list covers data center security services headquartered in New York, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 10, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 10, 2026 86% judged on-target in blind review
82Companies
3,808Contacts tracked
311Verified emails
1,252Mobile numbers
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The 25 largest data center security services based in New York, United States

Ranked by team size
Top 25 of 82 data center security services based in New York, United States, ranked by team size, largest first. Data refreshed Sep 10, 2026. RevenueBase Smart Search rates how each company's information relates to data center security services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202610001+1,375 contacts →

Partial evidence

“Guardsmark, LLC provides security services.”

Source: RevenueBase Database · checked Sep 10, 2026
2Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 2026501-1,000519 contacts →

Partial evidence

“Mulligan is a Manhattan-based provider of the finest security and fire safety professionals available.”

Source: RevenueBase Database · checked Sep 10, 2026
3Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 2026201-500206 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 10, 2026
4Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 2026501-1,000159 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 10, 2026
5Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 2026501-1,000120 contacts →

Partial evidence

“Excel Security Corp.”

Source: RevenueBase Database · checked Sep 10, 2026
6Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 2026201-500103 contacts →

Partial evidence

“Narrow Security provides Fire Guard Services and Security Guard Services across the US.”

Source: RevenueBase Database · checked Sep 10, 2026
7Partial evidenceNew York, United StatesHQ checked Sep 10, 2026501-1,00082 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 10, 2026
8Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 20261,001-5,00082 contacts →

Partial evidence

Security USA®, Inc.”

Source: RevenueBase Database · checked Sep 10, 2026
9Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202611-5072 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 10, 2026
10Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 2026201-50070 contacts →

Partial evidence

“At GLOBAL OPS, we specialize in creating and implementing tailored security solutions that cater to the unique needs of our diverse clientele.”

Source: RevenueBase Database · checked Sep 10, 2026
11Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 20261,001-5,00060 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 10, 2026
12Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202651-20055 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 10, 2026
13Indirect evidenceNew York, NY, United StatesHQ checked Sep 10, 202651-20036 contacts →

Indirect evidence

“OHZ is America’s way to secure and save.”

Source: RevenueBase Database · checked Sep 10, 2026
14Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202651-20036 contacts →

Partial evidence

SECURITY.”

Source: RevenueBase Database · checked Sep 10, 2026
15Indirect evidenceNew York, NY, United StatesHQ checked Sep 10, 202651-20034 contacts →

Indirect evidence

“JC Protection wants to ensure peace of mind to our clients by providing the highest level of protection for their enterprise, their assets and the safety of their personnel.”

Source: RevenueBase Database · checked Sep 10, 2026
16Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202611-5023 contacts →

Partial evidence

“Target Security Systems, LLC is New York City’s leading provider of cutting edge, high security solutions customized for today’s business and private sectors.”

Source: RevenueBase Database · checked Sep 10, 2026
17Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202611-5020 contacts →

Partial evidence

“Future-Ready Security for Today’s Decision-Makers.”

Source: RevenueBase Database · checked Sep 10, 2026
18Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202651-20019 contacts →

Partial evidence

“Professional security solutions and protective firm, providing armed & unarmed security services, security patrols and executive Protection services for individuals, residential…”

Source: RevenueBase Database · checked Sep 10, 2026
19Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202611-5018 contacts →

Partial evidence

“We help busy organizations provide maximum security with simple but sophisticated solutions which enable them to have everything under control.”

Source: RevenueBase Database · checked Sep 10, 2026
20Partial evidenceNew York, United StatesHQ checked Sep 10, 20261,001-5,00018 contacts →

Partial evidence

“We provide analysis and design of Physical Security Systems (PSS) of high risk facilities and critical infrastructure.”

Source: RevenueBase Database · checked Sep 10, 2026
21Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202651-20017 contacts →

Partial evidence

“Cohere offers managed security and IT infrastructure services all under one roof.”

Source: RevenueBase Database · checked Sep 10, 2026
22Indirect evidenceNew York, NY, United StatesHQ checked Sep 10, 2026201-50017 contacts →

Indirect evidence

“NEVER COMPROMISE WHEN IT COMES TO PROTECTION Under the leadership of Dennis J.”

Source: RevenueBase Database · checked Sep 10, 2026
23Partial evidenceNew York, United StatesHQ checked Sep 10, 20261-1013 contacts →

Partial evidence

“At SightWatch Security, we deliver proactive and trusted security solutions-from perimeter assessments to camera installation and real-time 24/7 monitoring.”

Source: RevenueBase Database · checked Sep 10, 2026
24Indirect evidenceNew York, NY, United StatesHQ checked Sep 10, 20261-1012 contacts →

Indirect evidence

“E-Valve Technologies is THE choice for your company's IT solutions.”

Source: RevenueBase Database · checked Sep 10, 2026
25Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202611-5011 contacts →

Partial evidence

“Analytica42 isn’t just a service provider; we’re a trusted partner in your security operations.”

Source: RevenueBase Database · checked Sep 10, 2026

Showing 25 of 82 data center security services based in New York, United States

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Data center security services based in New York, United States at a glance

As of Sep 10, 2026
8.2%Verified-email coverage
32.9%Mobile-number coverage
46.4Average contacts per company
11-50Median size (employees)
62.2%Largest-city concentration · New York
Sep 10, 2026Page data refreshed

Companies by employee count

1-10
20
11-50
23
51-200
19
201-500
9
501-1,000
6
1,001-5,000
4
10001+
1

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 13.0d

Company record updated

Median 74.0d

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among data center security services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in New York, United States whose own description of what they do matches “data center security services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names data center security services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among data center security services, and records with no verified work email. Companies headquartered outside New York are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 311 across the full list. 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 10, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Data center security services by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names data center security services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many data center security services are there based in New York, United States?

RevenueBase identified 82 data center security services headquartered in New York, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Guardsmark, headquartered in New York, tops this list with the largest team on record.

Which city has the most data center security services?

New York leads with 51 headquartered companies, followed by Dallas (49) and Houston (48).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 311 verified decision-maker contacts tracked across these 82 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 10, 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 Smart Search, 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.