Company lists · Data refreshed September 2026

Top 25 Cybersecurity contractors based in Houston, United States

Name: Cybersecurity contractors based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 167 companies tracked

RevenueBase identified 167 cybersecurity contractors headquartered in Houston, United States as of September 2026 and tracks 1,890 professional contacts across them, including 533 with verified work emails. New York is the largest hub.

This list covers cybersecurity contractors headquartered in Houston, 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 21, 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 21, 2026 86% judged on-target in blind review

167Companies

1,890Contacts tracked

533Verified emails

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The 25 largest cybersecurity contractors based in Houston, United States

Ranked by team size

Top 25 of 167 cybersecurity contractors based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity contractors: 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	Amsys Innovative Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	302 contacts →
	Indirect evidence “AMSYS is a nationwide IT Services Provider headquartered in Houston, TX.” Source: RevenueBase Database · checked Sep 21, 2026
2	Valuementor	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	51-200	167 contacts →
	Partial evidence “ValueMentor is a global information security consulting & services company that delivers real results to global business in maximizing cybersecurity.” Source: RevenueBase Database · checked Sep 21, 2026
3	Bulldog Security Services, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	128 contacts →
	Indirect evidence “Bulldog Security Services is a family-owned national ADT Authorized Dealer with over a decade of industry experience.” Source: RevenueBase Database · checked Sep 21, 2026
4	Acet Solutions	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	106 contacts →
	Partial evidence “ACET SOLUTIONS is a global OT Cybersecurity and Digital Transformation company serving the critical infrastructure industries.” Source: RevenueBase Database · checked Sep 21, 2026
5	Symposia	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	104 contacts →
	Partial evidence “An end-to-end intelligence platform that delivers Cybersecurity Trust Services & hands-on education to global industry leaders.” Source: RevenueBase Database · checked Sep 21, 2026
6	Scis Security	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	58 contacts →
	Indirect evidence “Accredited and Veteran Owned and Operated •Cyber Security \| MSSP Security Operations Center, CISO Advisory, Penetration Testing, Incident Response DFIR), and IT Security…” Source: RevenueBase Database · checked Sep 21, 2026
7	Quantavenues	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	n/a	53 contacts →
	Partial evidence “Quantavenues is a premium cybersecurity consulting and managed security partner for mid-market and enterprise organizations, built for the threat landscape of 2026, not the…” Source: RevenueBase Database · checked Sep 21, 2026
8	Asap Security Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	51-200	43 contacts →
	Indirect evidence “The premier security company of Texas where customers come first.” Source: RevenueBase Database · checked Sep 21, 2026
9	ALL Campus Security	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	33 contacts →
	Indirect evidence “All Campus Security globally offers customized integrated security solutions including video surveillance, door access control, intrusion detection, fire protection, structured…” Source: RevenueBase Database · checked Sep 21, 2026
10	Calatlantic	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	30 contacts →
	Indirect evidence “CalAtlantic is a leader in the security industry.” Source: RevenueBase Database · checked Sep 21, 2026
11	Armexa	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	25 contacts →
	Indirect evidence “At Armexa, we protect what matters most.” Source: RevenueBase Database · checked Sep 21, 2026
12	Alliant Cybersecurity	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	51-200	24 contacts →
	Partial evidence “Several years ago as cyber threats were becoming more and more advanced, we decided to search for a cybersecurity partner to help protect our client’s sensitive data and our…” Source: RevenueBase Database · checked Sep 21, 2026
13	SET Solutions, A Trace3 Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	51-200	21 contacts →
	Indirect evidence “Set Solutions is now a Trace3 Company.” Source: RevenueBase Database · checked Sep 21, 2026
14	securitygate.io	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “SecurityGate is a Houston-based cybersecurity software company.” Source: RevenueBase Database · checked Sep 21, 2026
15	Invoke	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “Invoke integrates unified cybersecurity and innovative business solutions for mid-to-large enterprises.” Source: RevenueBase Database · checked Sep 21, 2026
16	Janissary	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	51-200	18 contacts →
	Indirect evidence “Janissary, LLC is a registered service-disabled veteran owned small business (SDVOSB), headquartered in Houston, Texas.” Source: RevenueBase Database · checked Sep 21, 2026
17	Cyber ONE Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Cyber One Solutions is a Info Security and IT Managed Services and Consulting Company.” Source: RevenueBase Database · checked Sep 21, 2026
18	Transnet Communications LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “TRANSNET is a service provider for electronic security solutions as well as an IT expert that provides assessment, designs, installations, monitoring and maintenance to Security &…” Source: RevenueBase Database · checked Sep 21, 2026
19	RED Trident INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
20	Ikon Tech	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	51-200	14 contacts →
	Partial evidence “Ikon Tech is a highly regarded cybersecurity and IT infrastructure management company that provides comprehensive solutions to businesses of all sizes as they strive for digital…” Source: RevenueBase Database · checked Sep 21, 2026
21	Aarc Consultants, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “AARC Consultants serves businesses and governmental entities by conducting third party Risk and Resilience assessments, identifying Cyber Security vulnerabilities, developing…” Source: RevenueBase Database · checked Sep 21, 2026
22	Santcore Technologies	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	13 contacts →
	Partial evidence “Santcore Technologies is a multidisciplinary IT consulting and solutions firm specializing in cybersecurity, GRC, cloud architecture, application security, digital transformation…” Source: RevenueBase Database · checked Sep 21, 2026
23	ARK Of Safety Security Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
24	Itegriti Corporation	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	12 contacts →
	Indirect evidence “ITEGRITI /eye-teg-riti/ We Secure Critical Infrastructure.” Source: RevenueBase Database · checked Sep 21, 2026
25	Intelos	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	11-50	11 contacts →
	Indirect evidence “At Intelos, we drive meaningful change, revolutionizing business capabilities through high-quality IT services.” Source: RevenueBase Database · checked Sep 21, 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 contractors. 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 contractors.
Partial evidence: Its own public description names part of cybersecurity contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity contractors. 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 167 cybersecurity contractors based in Houston, United States

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Cybersecurity contractors based in Houston, United States at a glance

As of Sep 21, 2026

28.2%Verified-email coverage

11.3Average contacts per company

1-10Median size (employees)

175.4%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 167 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 contractors, 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 Houston, United States whose own description of what they do matches “cybersecurity contractors”. 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 contractors), 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 contractors, and records with no verified work email. Companies headquartered outside Houston 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, 533 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 21, 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 contractors 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 contractors, 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 contractors are there based in Houston, United States?

RevenueBase identified 167 cybersecurity contractors headquartered in Houston, 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?

Amsys Innovative Solutions, headquartered in Houston, tops this list with the largest team on record.

Which city has the most cybersecurity contractors?

New York leads with 293 headquartered companies, followed by Washington (220) and Austin (170).

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 533 verified decision-maker contacts tracked across these 167 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 21, 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.