Company lists · Data refreshed September 2026
Top 25 Managed security services companies based in Houston, United States
RevenueBase identified 85 managed security services companies headquartered in Houston, United States as of September 2026 and tracks 2,353 professional contacts across them, including 965 with verified work emails. New York is the largest hub.
This list covers managed security services companies 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.
The 25 largest managed security services companies based in Houston, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 450 | ||||
“If you’re a midsize enterprise with employees (i.e, an “MSE” according to Gartner), we know what you’re going through.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 392 | ||||
“DYOPATH, a leading Managed Service Provider (MSP) was founded to empower organizations by delivering trusted IT solutions that are grounded in accountability resulting in…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 286 | ||||
“Centre is a modern IT and cybersecurity partner delivering Managed IT, Business Intelligence, Cybersecurity, and Cloud services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | ValuementorPartial evidence | 167 | |||
“ValueMentor is a global information security consulting & services company that delivers real results to global business in maximizing cybersecurity.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 128 | ||||
“Bulldog Security Services is a family-owned national ADT Authorized Dealer with over a decade of industry experience.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 88 | ||||
“Mission Statement “Always Exceed Expectations” ADM Security Solutions exceeds expectations by providing innovative, comprehensive security solutions incorporating high value…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 58 | ||||
“Accredited and Veteran Owned and Operated •Cyber Security | MSSP Security Operations Center, CISO Advisory, Penetration Testing, Incident Response DFIR), and IT Security…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 53 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 33 | ||||
“All Campus Security globally offers customized integrated security solutions including video surveillance, door access control, intrusion detection, fire protection, structured…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 24 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | Avail Security Group, John Mccracken Principal COOPartial evidence | 20 | |||
“Security has become a current-day necessity.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 17 | ||||
“Cyber One Solutions is a Info Security and IT Managed Services and Consulting Company.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 14 | ||||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 13 | ||||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | Network BOX USAStrong evidence | 12 | |||
“We are your 24x7x365 Managed Security Service Provider (MSSP).” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | Percento TechnologiesPartial evidence | 11 | |||
“Percento Technologies is an enterprise level managed technology solutions provider specializing in managed services, cybersecurity, and AI-driven business strategies.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 8 | ||||
“RevelSec, a Dataprise company, provides a full-suite of solutions and services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 8 | ||||
“H5 Strategic Alliances seeks to defend an organization’s infrastructure against cybersecurity threats and vulnerabilities.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 7 | ||||
“Welcome to Nexus, where cutting-edge technology meets unparalleled expertise.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 | ||||
“AA Networks provides world class cybersecurity services and solutions, including Managed Detection and Response (MDR), cybersecurity compliance services, and Active Directory…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 5 | ||||
“CyberAccord: Leading Managed Cybersecurity Services for Enterprises CyberAccord is a leading managed cybersecurity services provider that offers full-service solutions to…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 | ||||
“We are a MSP based in Houston since 2001.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 3 | ||||
“We specialize in delivering top-notch cybersecurity and IT solutions, including 100% remote work services, XDR (Extended Detection and Response), advanced penetration testing, and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | Leading IT 4 UIndirect evidence | 3 | |||
“If you’re a midsize enterprise with employees, we get it-choosing the right MSP/MSSP can be a daunting task.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | Vincatech1Indirect evidence | 3 | |||
“At Vincatech1 we Maximize Your Company’s IT Performance with Outsourced IT Solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 85 managed security services companies based in Houston, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 965 reachable decision-makers.
Free signup · no credit card
Managed security services companies based in Houston, United States at a glance
As of Sep 5, 2026Companies by employee count
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 Houston, over 85 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 managed security services 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 Houston, United States whose own description of what they do matches “managed security services 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 managed security services companies, 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 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, 965 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 5, 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.
Managed security services companies by metro in the United States
- Managed security services companies in New York103
- Managed security services companies in Houston85
- Managed security services companies in Miami81
- Managed security services companies in Austin65
- Managed security services companies in Chicago64
- Managed security services companies in Dallas63
- Managed security services companies in Atlanta60
- Managed security services companies in Los Angeles57
- Managed security services companies in Tampa47
- Managed security services companies in San Francisco43
- Managed security services companies in Washington43
- Managed security services companies in Charlotte39
- Managed security services companies in Las Vegas38
- Managed security services companies in San Diego37
- Managed security services companies in Denver35
- Managed security services companies in Phoenix34
- Managed security services companies in Irvine30
- Managed security services companies in Arlington26
- Managed security services companies in Columbia26
- Managed security services companies in Orlando26
- Managed security services companies in Scottsdale25
- Managed security services companies in Wilmington25
Frequently asked
How many managed security services companies are there based in Houston, United States?
RevenueBase identified 85 managed security services companies 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?
Meriplex, headquartered in Houston, tops this list with the largest team on record.
Which city has the most managed security services companies?
New York leads with 103 headquartered companies, followed by Houston (85) and Miami (81).
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 965 verified decision-maker contacts tracked across these 85 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 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 85 managed security services companies based in Houston, United States. Start with a free account, no credit card.
Get the full listRelated lists
Managed security services companies by geography
- Managed security services companies based in the United States
- Managed security services companies based in the United Kingdom
- Managed security services companies based in Brazil
- Managed security services companies based in Canada
- Managed security services companies based in Australia
- Managed security services companies based in France
- Managed security services companies based in Germany
- Managed security services companies based in Italy
- Managed security services companies based in South Africa
- Managed security services companies based in Spain
- Managed security services companies based in the Netherlands
- Managed security services companies based in Mexico
Browse the directory
Browse: Companies home · Managed security services companies in United States · All United States lists · All Managed security services companies lists · New lists
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Managed security services companies based in the United States
- Managed security services companies based in the United Kingdom
- Managed security services companies based in Brazil
- Managed security services companies based in Canada
- Managed security services companies based in Australia
- Managed security services companies based in France