Company lists · Data refreshed September 2026

Top 25 Cybersecurity services firms based in Dallas, United States

Name: Cybersecurity services firms based in Dallas, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 123 companies tracked

RevenueBase identified 123 cybersecurity services firms headquartered in Dallas, United States as of September 2026 and tracks 1,744 professional contacts across them, including 711 with verified work emails. New York is the largest hub.

This list covers cybersecurity services firms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 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 14, 2026 86% judged on-target in blind review

123Companies

1,744Contacts tracked

711Verified emails

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The 25 largest cybersecurity services firms based in Dallas, United States

Ranked by team size

Top 25 of 123 cybersecurity services firms based in Dallas, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity services firms: 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Levelblue	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1,001-5,000	594 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
2	At&t Cybersecurity	Strong evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1,001-5,000	156 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 14, 2026
3	Sq1 Security	Strong evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	201-500	154 contacts →
	Strong evidence “SQ1 Security is a global cybersecurity leader offering end-to-end cybersecurity and compliance solution.” Source: RevenueBase Database · checked Sep 14, 2026
4	Configure, INC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	201-500	89 contacts →
	Indirect evidence “At Configure, we don’t just connect networks, we connect people, ideas, and possibilities.” Source: RevenueBase Database · checked Sep 14, 2026
5	Zyston LLC	Strong evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	51-200	70 contacts →
	Strong evidence “Zyston is a next‑generation cybersecurity partner dedicated to helping organizations stay one step ahead of threats.” Source: RevenueBase Database · checked Sep 14, 2026
6	Apollo Information Systems	Strong evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	51-200	64 contacts →
	Strong evidence “Apollo Information Systems delivers intelligence-led cybersecurity solutions for government agencies, educational institutions, and enterprises.” Source: RevenueBase Database · checked Sep 14, 2026
7	Oaktruss Group	Strong evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	51-200	52 contacts →
	Strong evidence “OakTruss Group is an advisory firm focused on helping organizations operate securely at the intersection of cybersecurity, AI, and data.” Source: RevenueBase Database · checked Sep 14, 2026
8	Solcyber	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	51-200	25 contacts →
	Indirect evidence “SolCyber, a Forgepoint company, is the first modern MSSP to deliver a curated stack of enterprise strength security tools and services that are streamlined, accessible and…” Source: RevenueBase Database · checked Sep 14, 2026
9	Voluble Systems LLC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	51-200	24 contacts →
	Indirect evidence “Voluble Systems LLC.(VOLUBLE) professional services company that provides strategy, custom information technology, information security, consulting, digital, technology…” Source: RevenueBase Database · checked Sep 14, 2026
10	Clover IT	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	11-50	18 contacts →
	Indirect evidence “Founded in 2011, Clover IT is known as an innovative company, focused on Information Security and Compliance market.” Source: RevenueBase Database · checked Sep 14, 2026
11	Upstart Cyber	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	11-50	15 contacts →
	Indirect evidence “At Upstart Cyber, we bring the expertise gained from government and large-scale businesses to organizations of all sizes.” Source: RevenueBase Database · checked Sep 14, 2026
12	Progressive IT Solutions	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1-10	10 contacts →
	Indirect evidence “We are like an “easy button” for your IT Department!” Source: RevenueBase Database · checked Sep 14, 2026
13	Technoxi	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	11-50	9 contacts →
	Indirect evidence “Technoxi isn't your average IT company, and we never wanted to be.” Source: RevenueBase Database · checked Sep 14, 2026
14	Phoenix IT Advisors LLC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	11-50	7 contacts →
	Indirect evidence “Did you know that the IT Industry is completely unregulated?” Source: RevenueBase Database · checked Sep 14, 2026
15	Black Belt Secure	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1-10	6 contacts →
	Indirect evidence “We are security engineers with over 20 years of experience working in the DFW Metroplex.” Source: RevenueBase Database · checked Sep 14, 2026
16	TTR Technology	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	11-50	6 contacts →
	Indirect evidence “TTR Technology Provides Complete Managed IT support and Cyber Security Solution to businesses Nationwide, our Mission is to efficiently manage, monitor, and optimize IT…” Source: RevenueBase Database · checked Sep 14, 2026
17	Gtsaas	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	51-200	6 contacts →
	Indirect evidence “GTSaaS stands for Global Technology Sales-as-a-Service.” Source: RevenueBase Database · checked Sep 14, 2026
18	Cybase Risk Management	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1-10	6 contacts →
	Indirect evidence “CyBase Risk is a catalyst cyber risk management consulting firm, dedicated to empowering small and medium-sized businesses (SMBs) with insight and roadmaps to proactively protect…” Source: RevenueBase Database · checked Sep 14, 2026
19	Avetixcyber	Indirect evidence	Dallas, United StatesHQ checked Sep 14, 2026	11-50	5 contacts →
	Indirect evidence “Backed by a network of top VCs, advisory leaders, and elite cyber talent, we accelerate growth through deep market insight and hands-on support.” Source: RevenueBase Database · checked Sep 14, 2026
20	Logos Systems	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1-10	5 contacts →
	Indirect evidence “At Logos Systems we are a security and vCISO services provider.” Source: RevenueBase Database · checked Sep 14, 2026
21	ASI Security Partners	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1-10	4 contacts →
	Indirect evidence “ASI Security Partners, a leading network and internet security company, delivers a comprehensive set of best-of-breed solutions that help customers protect their critical…” Source: RevenueBase Database · checked Sep 14, 2026
22	Birch Cline Cybersecurity	Strong evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	11-50	4 contacts →
	Strong evidence “Birch Cline is a Dallas, Texas-based cybersecurity firm that specializes in protecting highly regulated environments and government agencies.” Source: RevenueBase Database · checked Sep 14, 2026
23	Strafe Cybersecurity	Strong evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1-10	4 contacts →
	Strong evidence “Welcome to Strafe, where cybersecurity steps up to combat emerging threats.” Source: RevenueBase Database · checked Sep 14, 2026
24	Method Cyber Security	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Indirect evidence “Method is here to assist its clients in protecting their vital information from the plethora of cyber-attacks occurring within all business segments.” Source: RevenueBase Database · checked Sep 14, 2026
25	Bolt Resources	Strong evidence	Dallas, TX, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Strong evidence “At Bolt Resources, we believe cybersecurity leadership is the cornerstone of modern business resilience.” Source: RevenueBase Database · checked Sep 14, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cybersecurity services firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names cybersecurity services firms.
Partial evidence: Its own public description names part of cybersecurity services firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity services firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 123 cybersecurity services firms based in Dallas, United States

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Cybersecurity services firms based in Dallas, United States at a glance

As of Sep 14, 2026

40.8%Verified-email coverage

14.2Average contacts per company

1-10Median size (employees)

208.9%Largest-city concentration · New York

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Dallas, so it is reported there. Company counts and contact totals on this page are exact for Dallas, over 123 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 cybersecurity services firms, 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 Dallas, United States whose own description of what they do matches “cybersecurity services firms”. 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 cybersecurity services firms), 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 cybersecurity services firms, 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 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, 711 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 14, 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.

Cybersecurity services firms 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 cybersecurity services firms, 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 cybersecurity services firms are there based in Dallas, United States?

RevenueBase identified 123 cybersecurity services firms 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?

Levelblue, headquartered in Dallas, tops this list with the largest team on record.

Which city has the most cybersecurity services firms?

New York leads with 257 headquartered companies, followed by Washington (154) and Austin (153).

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 711 verified decision-maker contacts tracked across these 123 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 14, 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.