Company lists · Data refreshed November 2026

Top 25 Enterprise cybersecurity companies based in Arlington, United States

Name: Enterprise cybersecurity companies based in Arlington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 79 companies tracked

RevenueBase identified 79 company matches for enterprise cybersecurity companies associated with Arlington, United States as of November 2026 and tracks 1,450 professional contacts across them, including 529 with verified work emails. Across the United States, New York is the largest hub for this category (376 companies); Arlington has 79.

This list covers company matches for enterprise cybersecurity companies associated with Arlington, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built

79Companies

1,450Contacts tracked

529Verified emails

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The 25 largest enterprise cybersecurity companies based in Arlington, United States

Ranked by team size

Top 25 of 79 company matches for enterprise cybersecurity companies based in Arlington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Millennium Corporation	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	201-500	173 contacts →
	Exact match “For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	Shift5	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	51-200	141 contacts →
	Exact match “Former military officers who stood up U.S.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	DTS	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	127 contacts →
	Exact match “DTS (Do The Security™) is a Service-Disabled Veteran-Owned Small Business (SDVOSB) and CMMC Level 2 certified, ISO 27001-certified Managed Security Services Provider (MSSP)…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	Cybastion	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	51-200	76 contacts →
	Exact match “CYBASTION develops robust world-class cybersecurity solutions tailored to suit the needs of different businesses, governments and public sector entities.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	Sancorp Consulting, LLC	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	51-200	71 contacts →
	Exact match “Sancorp Consulting, LLC is focused on providing tailored, professional solutions in the areas of Insider Threat, Artificial Intelligence/Machine Learning, Identity Activities, and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	Zetier	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	51-200	61 contacts →
	Exact match “Zetier develops world-class cybersecurity products that protect our nation and our communities.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	ACI Solutions	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	43 contacts →
	Exact match “ACI Solutions is a Secure Cloud and Managed Services Provider with U.S headquarters in Arlington, Virginia.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	SUN Management	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	36 contacts →
	Exact match “Sun Management is a customer focused cybersecurity & advanced network solutions firm providing products and services that help solve your most difficult IT challenges.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	D2 Consulting	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	30 contacts →
	Exact match “D2 Consulting provides services to the Federal Government focused in the following three area's We leverage D2 Consulting engineering, operations and governance best practices to…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	Custom Information Services	Exact match	Arlington, TX, United StatesHQ recorded Nov 5, 2026	11-50	29 contacts →
	Exact match “Your IT should propel the growth and profitability of your company.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	HLINC	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	28 contacts →
	Exact match “Big Business Capability from a Small Business HLinc delivers holistic solutions to our customers’ needs – we develop, integrate, and implement technological solutions, customized…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Zeichner Risk Analytics ZRA	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	22 contacts →
	Exact match “For over 20 years, Zeichner Risk Analytics (ZRA) has had small business experience in cybersecurity, risk management, program management, strategic planning and law and policy.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Dios-Tech LLC	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	17 contacts →
	Exact match “We currently serve four Service areas: Cyber Security Services, Server Management Services, Software Development Services, and Support Services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Cedelis	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	15 contacts →
	Exact match “CEDELIS is an 8(a) Service-Disabled Minority Veteran-Owned Small Business (SDVOSB) that offers innovative IT services to Federal and Civilian agencies, located in the Washington…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Dowless & Associates, INC	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	12 contacts →
	Exact match “Dowless & Associates was incorporated in Dowless & Associates' competencies include Information and Cyber Security, IT Integration, Organizational Change Management and Integrated…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Hancock & Poole Security INC	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	11 contacts →
	Exact match “Hancock & Poole Security (HPS) Inc.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Enzo IT Solutions	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	501-1,000	10 contacts →
	Exact match “ENZO IT Solutions,"ENZO", is a leading organization of security, audit, and advisory experts.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	The Enterprise Security Consultants	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	8 contacts →
	Exact match “The Enterprise Security Consultants, LLC (dba TES Consultants) is an 8(a) Woman-Owned Small Business (WOSB) delivering industry leading cybersecurity and information technology…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Tactibit Technologies	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	7 contacts →
	Exact match “Tactibit is a small business serving Federal customers, specializing in Cybersecurity, Cloud Services and IT Operations.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Neuvik	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	1-10	7 contacts →
	Exact match “Neuvik is a cybersecurity services company organized into cross-discipline offerings focused on integrating assessments and risk management into comprehensive security solutions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Cyberblack	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	1-10	7 contacts →
	Exact match “Cyberblack is a specialized cybersecurity consulting firm delivering high-impact risk management, compliance auditing, and offensive and defensive security strategies to…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Cynalytica	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	6 contacts →
	Exact match “Cynalytica, Inc.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Alico Cyber Solutions	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	1-10	6 contacts →
	Exact match “Alico Cyber Solutions provides information security serving highly satisfied customers in both the federal and private sectors.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Cybervault Solutions	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	5 contacts →
	Exact match “CyberVault Solutions is a mission-driven cybersecurity and technology firm dedicated to helping organizations protect critical systems, reduce cyber risk, and strengthen…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	Amplify Managed Services	Exact match	Arlington, VA, United StatesHQ recorded Nov 5, 2026	11-50	4 contacts →
	Exact match “Amplify is a managed service provider (MSP) focused on cybersecurity and IT support and management for small to medium businesses.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “enterprise cybersecurity companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 79 enterprise cybersecurity companies based in Arlington, United States

See the full list, filter by size, metro and specialty, and access 529 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Enterprise cybersecurity companies based in Arlington, United States at a glance

As of Nov 5, 2026

36.5%Verified-email coverage

18.4Average contacts per company

11-50Median size (employees)

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Arlington, so it is reported there. Company counts and contact totals on this page are exact for Arlington, over 79 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Arlington, United States whose business descriptions match “enterprise cybersecurity companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 529 professional contacts with verified work emails across the full matched dataset. 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 November 5, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Enterprise cybersecurity companies by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “enterprise cybersecurity companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many enterprise cybersecurity companies are there based in Arlington, United States?

RevenueBase identified 79 company matches for enterprise cybersecurity companies associated with Arlington, United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Millennium Corporation tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most enterprise cybersecurity companies?

New York leads the United States with 376 company records, followed by Houston (189) and Atlanta (182). Arlington has 79.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 529 professional contacts with verified work emails tracked across these 79 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 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.