Company lists · Data verified August 2026

Top 25 Cybersecurity companies based in Houston, United States

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 153 companies tracked

Our directory lists 153 cybersecurity companies based in Houston, United States, with 1,924 professional contacts and 797 email addresses. The list was last updated in August 2026, and New York is the single most-represented city among the companies listed.

Cybersecurity companies provide products and services that protect systems, networks, applications, devices, and data from unauthorized access, disruption, or misuse. This list covers companies that provide cybersecurity products, services, consulting, assessments, monitoring, incident response, or related protection for digital systems and data. Ranked by team size, largest first. Data current as of August 28, 2026.

153Companies

1,924Contacts tracked

797Verified emails

653Mobile numbers

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The 25 largest cybersecurity companies based in Houston, United States

Ranked by team size

Top 25 of 153 cybersecurity companies based in Houston, United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Dragos, INC	Houston, TX	501-1,000	544	382
2	Amsys Innovative Solutions	Houston, TX	201-500	311	123
3	Symposia	Houston, TX	11-50	105	5
4	Scis Security	Houston, TX	11-50	59	2
5	Guard 1 Services	Houston, TX	51-200	53	6
6	Airiam	Houston, TX	51-200	48	38
7	Armexa	Houston, TX	11-50	26	19
8	Skyhelm	Houston, TX	11-50	25	13
9	Alliant Cybersecurity	Houston, TX	51-200	24	16
10	SET Solutions, A Trace3 Company	Houston, TX	51-200	21	10
11	Invisinet Technologies	Houston, TX	11-50	20	10
12	securitygate.io	Houston, TX	11-50	18	11
13	Santcore Technologies	Houston, TX	11-50	14	4
14	Ikon Tech	Houston, TX	51-200	14	3
15	RED Trident INC	Houston, TX	11-50	14	3
16	Intelos	Houston, TX	11-50	11	2
17	Ngnsys, LLC	Houston, TX	11-50	9	6
18	Anuva Labs	Houston, TX	11-50	9	1
19	Daakyi	Houston, TX	11-50	8	2
20	Encipherusa Corp	Houston, TX	51-200	7	6
21	Revelsec, A Dataprise Company	Houston, TX	11-50	7	6
22	Merlin Solutions LLC	Houston, TX	11-50	7	1
23	NEXUS	Houston, TX	11-50	6	3
24	Cyberaccord	Houston, TX	11-50	5	1
25	Asgard Managed Services	Houston, TX	11-50	4	3

Showing 25 of 153 cybersecurity companies based in Houston, United States

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Cybersecurity companies based in Houston, United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 329 HQs

653Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Cybersecurity companies by metro in the United States

Metro	Companies
Cybersecurity companies in New York	329
Cybersecurity companies in Austin	182
Cybersecurity companies in San Francisco	179
Cybersecurity companies in Washington	168
Cybersecurity companies in Atlanta	158
Cybersecurity companies in Houston	153
Cybersecurity companies in Miami	149

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cybersecurity companies”, with match quality audited by blind human judging, and headquartered in Houston, United States.
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: Contact records re-verify on a rolling cadence; 2 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cybersecurity companies are in the directory?

The directory lists 153 cybersecurity companies based in Houston, United States.

Which city has the most cybersecurity companies?

New York is the single most-represented city among the cybersecurity companies on the list.

How many contacts are available for cybersecurity companies?

The directory includes 1,924 professional contacts and 797 email addresses for the listed cybersecurity companies.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.