Company lists · Data refreshed September 2026

Top 17 Cybersecurity and defense software companies based in Arlington, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 10, 2026 38 companies tracked

RevenueBase identified 38 company matches for cybersecurity and defense software companies associated with Arlington, United States as of September 2026 and tracks 7,432 professional contacts across them, including 253 with verified work emails and 3,414 with mobile numbers. Across the United States, New York is the largest hub for this category (56 companies); Arlington has 35.

This list covers company matches for cybersecurity and defense software 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 September 10, 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 Sep 10, 2026 How this list was built

38Companies

7,432Contacts tracked

253Verified emails

3,414Mobile numbers

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The 17 largest cybersecurity and defense software companies based in Arlington, United States

Ranked by team size

Top 17 of 38 company matches for cybersecurity and defense software companies based in Arlington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 10, 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	Leonardo DRS	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	5,001-10,000	5,980 contacts →
	Exact match “Leonardo DRS Inc.(Nasdaq: DRS) is at the forefront of developing transformative defense technologies using its proven agility and delivering innovative solutions for U.S.” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
2	Bluehalo, An AV Company	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	1,001-5,000	667 contacts →
	Exact match “BlueHalo is now part of AV, a global defense technology leader built for scale, driven by innovation, and delivering #AllDomainDominance across every domain of modern…” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
3	Millennium Corporation	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	201-500	265 contacts →
	Exact match “For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
4	Bridgephase	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	51-200	95 contacts →
	Exact match “BridgePhase is a mission-focused technology company that designs and builds secure digital solutions powering national security, government efficiency, and real-world impact.” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
5	Cybastion	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	51-200	58 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 · Sep 10, 2026 · View company records in RevenueBase
6	System Planning Corporation	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	51-200	47 contacts →
	Exact match “System Planning Corporation (SPC)’s success supporting U.S.” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
7	SUN Management	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	11-50	33 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 · Sep 10, 2026 · View company records in RevenueBase
8	A2 Labs, LLC	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	11-50	21 contacts →
	Exact match “Cybersecurity Research and Development firm” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
9	Strategic Technology Partners	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	11-50	19 contacts →
	Exact match “STP is an IT services company that specializes in building mission critical infrastructure, applications and cybersecurity systems.” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
10	Existx	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	11-50	13 contacts →
	Exact match “ExistX was founded in 2023 with the goal to combine cutting edge invention with practical implementation in the unique environments our customers demand to solve national security…” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
11	Cynnovative	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	11-50	10 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
12	Amches	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	11-50	7 contacts →
	Exact match “Amches provides Wireless and Cyber Security Solutions using proprietary advanced Agile Methodology to cohesively integrate Program Management, Systems Engineering, and both…” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
13	Cyberblack	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	1-10	6 contacts →
	Exact match “Cyberblack is an Arlington, Virginia based consulting firm that specializes in providing commercial, government and personal solutions in the cybersecurity field.” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
14	Cystemic Security	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	11-50	4 contacts →
	Exact match “Whether it's cybersecurity, cloud computing, data analytics, emerging technologies, or operational guidance, our experts possess the knowledge and skills necessary to deliver…” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
15	Shieldsurge Consulting	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	1-10	3 contacts →
	Exact match “Shieldsurge Consulting is a boutique cybersecurity firm specializing in multiple areas of operational IT security, including security engineering, critical incident response…” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
16	Inqwest INC	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	1-10	2 contacts →
	Exact match “InQwest Inc was founded in 2015 in Arlington, Virginia, by passionate members working within the IT Security Community.” Recorded in the RevenueBase company graph · Sep 10, 2026 · View company records in RevenueBase
17	Vancepoint	Exact match	Arlington, VA, United StatesHQ recorded Sep 10, 2026	1-10	1 contacts →
	Exact match “VancePoint is an innovative technology services and solutions provider with a core focus on cybersecurity.” Recorded in the RevenueBase company graph · Sep 10, 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 “cybersecurity and defense software 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 17 of 38 cybersecurity and defense software companies based in Arlington, United States

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Cybersecurity and defense software companies based in Arlington, United States at a glance

As of Sep 10, 2026

3.4%Verified-email coverage

45.9%Mobile-number coverage

195.6Average contacts per company

11-50Median size (employees)

Sep 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 14.0d

1940–30

2431–60

161–90

090–180

34180+

Company record updated

Median 73.0d

00–30

3,00431–60

3,47761–90

71990–180

232180+

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 “cybersecurity and defense software 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 253 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 September 10, 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.

Cybersecurity and defense software 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 “cybersecurity and defense software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity and defense software companies are there based in Arlington, United States?

RevenueBase identified 38 company matches for cybersecurity and defense software companies associated with Arlington, United States as of September 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?

Leonardo DRS 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 cybersecurity and defense software companies?

New York leads the United States with 56 company records, followed by Washington (53) and Austin (42). Arlington has 35.

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 253 professional contacts with verified work emails tracked across these 38 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 September 10, 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.