Company lists · Data refreshed October 2026

Top 25 Cybersecurity companies based in Arlington, United States

Name: 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 Oct 1, 2026 87 companies tracked

Our directory lists 87 cybersecurity companies based in Arlington, United States, with 1,911 professional contacts and 879 email addresses. The list was last updated in October 2026. Across the United States, New York is the largest hub for this category (358 companies); Arlington has 87.

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 October 1, 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 Oct 1, 2026 86% judged on-target in blind review

87Companies

1,911Contacts tracked

879Verified emails

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The 25 largest cybersecurity companies based in Arlington, United States

Ranked by team size

Top 25 of 87 cybersecurity companies based in Arlington, United States, ranked by team size, largest first. Data refreshed Oct 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity companies: 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	DEXIS	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	51-200	303 contacts →
	Indirect evidence “Dexis is a mission-driven security analytics company that helps U.S.” Source: RevenueBase Database · checked Oct 1, 2026
2	Millennium Corporation	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	201-500	265 contacts →
	Strong evidence “For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.” Source: RevenueBase Database · checked Oct 1, 2026
3	RMC Global	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	51-200	167 contacts →
	Indirect evidence “We believe resilience depends on minimizing and managing the increasing risks facing the critical infrastructure and industrial systems that support our country, companies, and…” Source: RevenueBase Database · checked Oct 1, 2026
4	Shift5	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	51-200	129 contacts →
	Indirect evidence “Former military officers who stood up U.S.” Source: RevenueBase Database · checked Oct 1, 2026
5	Threatconnect	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	51-200	112 contacts →
	Indirect evidence “ThreatConnect, now a part of Dataminr, provides solutions to enable cyber defenders to continuously manage threat exposure and improve cyber resilience.” Source: RevenueBase Database · checked Oct 1, 2026
6	DTS	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	110 contacts →
	Indirect evidence “DTS (Do The Security™) is a Service-Disabled Veteran-Owned Small Business (SDVOSB) and CMMC Level 2 enterprise-wide certified, ISO 27001-certified Managed Security Services…” Source: RevenueBase Database · checked Oct 1, 2026
7	Zermount, INC	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	51-200	105 contacts →
	Strong evidence “Zermount, Inc, a Certified SDVOSB, was founded by Terry Butler a proven leader and Cybersecurity/Information Technology (IT) professional with over15 years’ experience supporting…” Source: RevenueBase Database · checked Oct 1, 2026
8	Sancorp Consulting, LLC	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	51-200	60 contacts →
	Indirect evidence “Sancorp Consulting, LLC is focused on providing tailored, professional solutions in the areas of Insider Threat, Artificial Intelligence/Machine Learning, Identity Activities, and…” Source: RevenueBase Database · checked Oct 1, 2026
9	Tesla Laboratories, INC	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	59 contacts →
	Indirect evidence “Tesla Laboratories provides Cyber Security, Intelligence Analysis, Financial Management and Program Management services to the Intelligence Community, the Department of Defense…” Source: RevenueBase Database · checked Oct 1, 2026
10	Cybastion	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	51-200	58 contacts →
	Strong evidence “CYBASTION develops robust world-class cybersecurity solutions tailored to suit the needs of different businesses, governments and public sector entities.” Source: RevenueBase Database · checked Oct 1, 2026
11	ACI Solutions	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	41 contacts →
	Indirect evidence “ACI Solutions is a Secure Cloud and Managed Services Provider with U.S headquarters in Arlington, Virginia.” Source: RevenueBase Database · checked Oct 1, 2026
12	SUN Management	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	33 contacts →
	Strong evidence “Sun Management is a customer focused cybersecurity & advanced network solutions firm providing products and services that help solve your most difficult IT challenges.” Source: RevenueBase Database · checked Oct 1, 2026
13	Zeichner Risk Analytics ZRA	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	24 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Oct 1, 2026
14	Groupsense	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	22 contacts →
	Strong evidence “GroupSense is a digital risk protection services company that delivers customer-specific intelligence that dramatically improves enterprise cybersecurity and fraud-management…” Source: RevenueBase Database · checked Oct 1, 2026
15	A2 Labs, LLC	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	21 contacts →
	Strong evidence “Cybersecurity Research and Development firm” Source: RevenueBase Database · checked Oct 1, 2026
16	Strategic Technology Partners	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	19 contacts →
	Strong evidence “STP is an IT services company that specializes in building mission critical infrastructure, applications and cybersecurity systems.” Source: RevenueBase Database · checked Oct 1, 2026
17	The Soter Group	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	13 contacts →
	Indirect evidence “The Soter Group is a small business based in Arlington, Virginia.” Source: RevenueBase Database · checked Oct 1, 2026
18	Hancock & Poole Security INC	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	11 contacts →
	Indirect evidence “Hancock & Poole Security (HPS) Inc.” Source: RevenueBase Database · checked Oct 1, 2026
19	Cynnovative	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	10 contacts →
	Indirect evidence “Cynnovative’s mission: To enable our customers to achieve superiority in the cyber domain by rewriting the laws of cyber and advancing state-of-the-art machine learning and…” Source: RevenueBase Database · checked Oct 1, 2026
20	The Enterprise Security Consultants	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	7 contacts →
	Strong evidence “The Enterprise Security Consultants, LLC (dba TES Consultants) is an 8(a) Woman-Owned Small Business (WOSB) delivering industry leading cybersecurity and information technology…” Source: RevenueBase Database · checked Oct 1, 2026
21	Amches	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	7 contacts →
	Indirect evidence “Amches provides Wireless and Cyber Security Solutions using proprietary advanced Agile Methodology to cohesively integrate Program Management, Systems Engineering, and both…” Source: RevenueBase Database · checked Oct 1, 2026
22	Alico Cyber Solutions	Indirect evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	1-10	7 contacts →
	Indirect evidence “Alico Cyber Solutions provides information security serving highly satisfied customers in both the federal and private sectors.” Source: RevenueBase Database · checked Oct 1, 2026
23	Neuvik	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	1-10	6 contacts →
	Strong evidence “Neuvik is a cybersecurity services company organized into cross-discipline offerings focused on integrating assessments and risk management into comprehensive security solutions.” Source: RevenueBase Database · checked Oct 1, 2026
24	Cover6 Solutions	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	11-50	6 contacts →
	Strong evidence “Cover6 Solutions is a veteran-owned cybersecurity firm delivering vCISO services, compliance advisory, penetration testing, and workforce development to organizations across the…” Source: RevenueBase Database · checked Oct 1, 2026
25	Cyberblack	Strong evidence	Arlington, VA, United StatesHQ checked Oct 1, 2026	1-10	6 contacts →
	Strong evidence “Cyberblack is an Arlington, Virginia based consulting firm that specializes in providing commercial, government and personal solutions in the cybersecurity field.” Source: RevenueBase Database · checked Oct 1, 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 companies. 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 companies.
Partial evidence: Its own public description names part of cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity companies. 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 87 cybersecurity companies based in Arlington, United States

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Cybersecurity companies based in Arlington, United States at a glance

As of Oct 1, 2026

46.0%Verified-email coverage

22.0Average contacts per company

11-50Median size (employees)

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

10001+

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 87 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 companies, 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 Arlington, United States whose own description of what they do matches “cybersecurity companies”. 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 companies), 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 companies, and records with no verified work email. Companies headquartered outside Arlington 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, 879 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 October 1, 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 companies by metro in the United States

Frequently asked

How many cybersecurity companies are in the directory?

The directory lists 87 cybersecurity companies based in Arlington, United States.

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

New York leads the United States with 358 headquartered companies, followed by San Francisco (190) and Austin (187). Arlington has 87.

How many contacts are available for cybersecurity companies?

The directory includes 1,911 professional contacts and 879 email addresses for the listed cybersecurity companies.

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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.