Company lists · Data refreshed September 2026

Top 10 Industrial cybersecurity companies based in Dallas, United States

RevenueBase identified 27 industrial cybersecurity companies headquartered in Dallas, United States as of September 2026 and tracks 460 professional contacts across them, including 141 with verified work emails. New York is the largest hub.

This list covers industrial cybersecurity companies headquartered in Dallas, 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
27Companies
460Contacts tracked
141Verified emails
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The 10 largest industrial cybersecurity companies based in Dallas, United States

Ranked by team size
Top 10 of 27 industrial cybersecurity companies based in Dallas, United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names industrial cybersecurity companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
At&t CybersecurityPartial evidence
Dallas, TX, United StatesHQ checked Sep 3, 20261,001-5,000158

“AT & T Cybersecurity’s Edge-to-Edge technologies provide phenomenal threat intelligence, collaborative defense, security without the seams, and solutions that fit your business.”

Source: company website · checked Sep 3, 2026
2
Zyston LLCPartial evidence
Dallas, TX, United StatesHQ checked Sep 3, 202651-20069

“Zyston is a next‑generation cybersecurity partner dedicated to helping organizations stay one step ahead of threats.”

Source: company website · checked Sep 3, 2026
3Dallas, TX, United StatesHQ checked Sep 3, 202651-20063

“Apollo Information Systems delivers intelligence-led cybersecurity solutions for government agencies, educational institutions, and enterprises.”

Source: company website · checked Sep 3, 2026
4
Miller Jones, INCIndirect evidence
Dallas, TX, United StatesHQ checked Sep 3, 2026201-50032

“With a vision to become one of the foremost leaders, partner and trailblazer in the cyber security industry, Miller Jones Inc, features a rich portfolio of information security…”

Source: company website · checked Sep 3, 2026
5
Upstart CyberIndirect evidence
Dallas, TX, United StatesHQ checked Sep 3, 202611-5016

“At Upstart Cyber, we bring the expertise gained from government and large-scale businesses to organizations of all sizes.”

Source: company website · checked Sep 3, 2026
6
GtsaasIndirect evidence
Dallas, TX, United StatesHQ checked Sep 3, 202651-2006

“GTSaaS stands for Global Technology Sales-as-a-Service.”

Source: company website · checked Sep 3, 2026
7
Birch Cline CybersecurityPartial evidence
Dallas, TX, United StatesHQ checked Sep 3, 202611-504

“Birch Cline is a Dallas, Texas-based cybersecurity firm that specializes in protecting highly regulated environments and government agencies.”

Source: company website · checked Sep 3, 2026
8
Method Cyber SecurityIndirect evidence
Dallas, TX, United StatesHQ checked Sep 3, 20261-103

“Method is here to assist its clients in protecting their vital information from the plethora of cyber-attacks occurring within all business segments.”

Source: company website · checked Sep 3, 2026
9
DL CyberPartial evidence
Dallas, TX, United StatesHQ checked Sep 3, 20261-102

“Dallas-based firm delivering strategic cybersecurity solutions that close critical security gaps and enable business growth.”

Source: company website · checked Sep 3, 2026
10
Slva CybersecurityIndirect evidence
Dallas, TX, United StatesHQ checked Sep 3, 20261-102

“SLVA’s expertise has been hard won in the trenches of banks and financial services, healthcare, telecommunications, retail, utilities, and government organizations.”

Source: company website · checked Sep 3, 2026

Showing 10 of 27 industrial cybersecurity companies based in Dallas, United States

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Industrial cybersecurity companies based in Dallas, United States at a glance

As of Sep 3, 2026
11-50Median size (employees)
New YorkLargest hub · 57 HQs
Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

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

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Dallas, over 27 companies.

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 industrial cybersecurity companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Dallas, United States whose own description of what they do matches “industrial cybersecurity companies”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among industrial cybersecurity companies, and records with no verified work email. Companies headquartered outside Dallas 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 an evidence 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, 141 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 3, 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.

Frequently asked

How many industrial cybersecurity companies are there based in Dallas, United States?

RevenueBase identified 27 industrial cybersecurity companies headquartered in Dallas, 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?

At&t Cybersecurity, headquartered in Dallas, tops this list with the largest team on record.

Which city has the most industrial cybersecurity companies?

New York leads with 57 headquartered companies, followed by Houston (45) and Austin (35).

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 141 verified decision-maker contacts tracked across these 27 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 3, 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.