Company lists · Data refreshed September 2026

Top 16 Data center security companies based in New York, United States

RevenueBase identified 32 data center security companies headquartered in New York, United States as of September 2026 and tracks 1,332 professional contacts across them, including 203 with verified work emails and 384 with mobile numbers. Dallas is the largest hub.

This list covers data center security companies 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
32Companies
1,332Contacts tracked
203Verified emails
384Mobile numbers
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The 16 largest data center security companies based in New York, United States

Ranked by team size
Top 16 of 32 data center security companies 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 companies: 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, 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
2Partial 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
3Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 2026501-1,000120 contacts →

Partial evidence

“Excel Security Corp.”

Source: RevenueBase Database · checked Sep 10, 2026
4Partial 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
5Partial 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
6Partial 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
7Partial 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
8Partial 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
9Partial 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
10Partial 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
11Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202611-5016 contacts →

Partial evidence

“WizNucleus provides cyber & physical security solutions for mission-critical facilities, including nuclear and electric.”

Source: RevenueBase Database · checked Sep 10, 2026
12Indirect 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
13Strong evidenceNew York, NY, United StatesHQ checked Sep 10, 20261-106 contacts →

Strong evidence

“Professional Security Contractors in Commercial and Residential Smart Home Automation, IP Cameras, Access Control, Network, Voice & Data

Source: RevenueBase Database · checked Sep 10, 2026
14Partial evidenceNew York, NY, United StatesHQ checked Sep 10, 202611-505 contacts →

Partial evidence

“Rigid Security is a New York-based security systems company specializing in professional-grade solutions for businesses, nonprofits, and government organizations.”

Source: RevenueBase Database · checked Sep 10, 2026
15Partial evidenceNew York, United StatesHQ checked Sep 10, 202611-504 contacts →

Partial evidence

“Velstadt is a cybersecurity provider focused on delivering both offensive and defensive security services.”

Source: RevenueBase Database · checked Sep 10, 2026
16Indirect evidenceNew York, NY, United StatesHQ checked Sep 10, 20261-101 contacts →

Indirect evidence

“At Cyvergence, our mission is to empower organizations by delivering state of the art cybersecurity products and services that fortify your digital ecosystem.”

Source: RevenueBase Database · checked Sep 10, 2026

Showing 16 of 32 data center security companies based in New York, United States

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

As of Sep 10, 2026
15.2%Verified-email coverage
28.8%Mobile-number coverage
41.6Average contacts per company
11-50Median size (employees)
109.4%Largest-city concentration · Dallas
Sep 10, 2026Page data refreshed

Companies by employee count

1-10
9
11-50
9
51-200
5
201-500
2
501-1,000
5
1,001-5,000
2

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 companies, 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 companies”. 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 companies), 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 companies, 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, 203 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 companies 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 companies, 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 companies are there based in New York, United States?

RevenueBase identified 32 data center security companies 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?

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

Which city has the most data center security companies?

Dallas leads with 35 headquartered companies, followed by New York (34) and Houston (32).

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 203 verified decision-maker contacts tracked across these 32 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.