Company lists · Data refreshed September 2026

Top 23 Defense cybersecurity companies based in Reston, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 40 companies tracked

RevenueBase identified 40 defense cybersecurity companies headquartered in Reston, United States as of September 2026 and tracks 14,214 professional contacts across them, including 1,355 with verified work emails. Washington is the largest hub.

This list covers defense cybersecurity companies headquartered in Reston, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 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 Sep 14, 2026 86% judged on-target in blind review

40Companies

14,214Contacts tracked

1,355Verified emails

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The 23 largest defense cybersecurity companies based in Reston, United States

Ranked by team size

Top 23 of 40 defense cybersecurity companies based in Reston, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to defense 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	Peraton	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	10001+	10,793 contacts →
	Indirect evidence “At Peraton, we're at the forefront of delivering the next big thing every day.” Source: RevenueBase Database · checked Sep 14, 2026
2	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	1,001-5,000	1,232 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 14, 2026
3	Quantum SKY	Partial evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	1,001-5,000	872 contacts →
	Partial evidence “Quantum Sky is a mission technology company that builds secure AI, cyber, cloud, and quantum capabilities for defense, intelligence, and federal civilian agencies.” Source: RevenueBase Database · checked Sep 14, 2026
4	Evolver	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	501-1,000	235 contacts →
	Indirect evidence “Founded in Evolver was built on a clear purpose: to help government and enterprise customers achieve long-term success.” Source: RevenueBase Database · checked Sep 14, 2026
5	Mindpoint Group, A Quantum SKY Company	Partial evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	1,001-5,000	204 contacts →
	Partial evidence “MindPoint Group, a Quantum Sky company, is a cybersecurity specialist trusted by U.S.” Source: RevenueBase Database · checked Sep 14, 2026
6	Intelligent Waves	Partial evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	51-200	185 contacts →
	Partial evidence “Intelligent Waves, a veteran-owned organization, delivers secure, innovative technology solutions for federal defense and intelligence missions.” Source: RevenueBase Database · checked Sep 14, 2026
7	Synertex LLC	Partial evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	201-500	116 contacts →
	Partial evidence “Synertex LLC is an Enterprise IT and Solutions Development company focusing on machine learning, cloud and big data solutions, cyber security, and CBRN defense (Chemical…” Source: RevenueBase Database · checked Sep 14, 2026
8	Fortinet Federal	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	51-200	70 contacts →
	Indirect evidence “Fortinet Federal is dedicated to bringing expertise and commitment to U.S.” Source: RevenueBase Database · checked Sep 14, 2026
9	Axonius Federal Systems	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	51-200	65 contacts →
	Indirect evidence “Axonius Federal Systems (AFS) provides a unified asset inventory and continuous insight into exposures, all while aligning with key mandates like Zero Trust, CDM, FISMA, EO 14028…” Source: RevenueBase Database · checked Sep 14, 2026
10	Global Infotek, INC	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	51-200	58 contacts →
	Indirect evidence “Global InfoTek, Inc.(GITI) is a mid-sized, award-winning leader in designing, developing, and deploying cutting-edge technologies that address the nation's most critical cyber and…” Source: RevenueBase Database · checked Sep 14, 2026
11	Volexity	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	51-200	44 contacts →
	Indirect evidence “Volexity is a leading provider of threat intelligence and incident suppression services and solutions based in the Washington, DC area.” Source: RevenueBase Database · checked Sep 14, 2026
12	Rogerco, INC	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	51-200	35 contacts →
	Indirect evidence “ROGERCO (RCI) is an integrated technology and communications consultancy supporting government and critical infrastructure missions.” Source: RevenueBase Database · checked Sep 14, 2026
13	Knowledge Consulting Group	Partial evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	201-500	29 contacts →
	Partial evidence “Knowledge Consulting Group (KCG) is one of the largest privately held cybersecurity services firms in the United States.” Source: RevenueBase Database · checked Sep 14, 2026
14	Mission Phoenix, LLC	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	11-50	26 contacts →
	Indirect evidence “Mission Phoenix \| Resilience Redefined Mission Phoenix is a certified small business redefining resilience across the federal landscape.” Source: RevenueBase Database · checked Sep 14, 2026
15	Vexterra Group	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	11-50	20 contacts →
	Indirect evidence “Vexterra Group is a Woman-Owned Small Business (WOSB), Small-Disadvantaged Business (SDB) and 8a certified digital forensic and cyber security engineering firm headquartered in…” Source: RevenueBase Database · checked Sep 14, 2026
16	Tenacity Solutions Incorporated	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	51-200	18 contacts →
	Indirect evidence “Tenacity Provides: Today's service oriented architectures, virtualized servers and increased demand for mobile service have made the difficult problem of securing important…” Source: RevenueBase Database · checked Sep 14, 2026
17	Dark Circuit Labs	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	1-10	9 contacts →
	Indirect evidence “Dark Circuit Labs is an offensive cyber security company that provides the highest quality products and services to support the nation’s operational missions.” Source: RevenueBase Database · checked Sep 14, 2026
18	Axiom Technologies LLC	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	1-10	7 contacts →
	Indirect evidence “Successful businesses today require interactions with the networked world, where threats continuously probe for new ways to obtain your critical information.” Source: RevenueBase Database · checked Sep 14, 2026
19	River Front Services, INC	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	1-10	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
20	Legion X	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Indirect evidence “Legion X is a company that develops on-demand, custom cyber solutions through applied research, prototyping, and engineering services.” Source: RevenueBase Database · checked Sep 14, 2026
21	Empower Solutions	Partial evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Partial evidence “Empower Solutions is a trusted IT partner that specializes in providing comprehensive IT and cybersecurity solutions to clients across the Federal Government and private sectors.” Source: RevenueBase Database · checked Sep 14, 2026
22	Business Cyber Shield	Indirect evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	11-50	1 contacts →
	Indirect evidence “WHAT WE DO: To put it simply, think of Business Cyber Shield as your virtual Chief Information Security Officer, enabling you to focus on what's important within your organization.” Source: RevenueBase Database · checked Sep 14, 2026
23	Cymantis	Partial evidence	Reston, VA, United StatesHQ checked Sep 14, 2026	1-10	1 contacts →
	Partial evidence “Cymantis is a full-range cybersecurity & Technology Consulting practice specializing in: 1_ Enterprise & Startup Cybersecurity strategy 2_ Federal, financial, & healthcare…” Source: RevenueBase Database · checked Sep 14, 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: defense 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 defense cybersecurity companies.
Partial evidence: Its own public description names part of defense cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defense 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 23 of 40 defense cybersecurity companies based in Reston, United States

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Defense cybersecurity companies based in Reston, United States at a glance

As of Sep 14, 2026

9.5%Verified-email coverage

355.4Average contacts per company

11-50Median size (employees)

215.0%Largest-city concentration · Washington

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United States list rather than for Reston, so it is reported there. Company counts and contact totals on this page are exact for Reston, over 40 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 defense 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 Reston, United States whose own description of what they do matches “defense 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 defense 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 defense cybersecurity companies, and records with no verified work email. Companies headquartered outside Reston 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, 1,355 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 14, 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.

Defense cybersecurity companies by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its 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 the category the list is about. Each row is rated strong evidence when the company's own description names defense cybersecurity companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many defense cybersecurity companies are there based in Reston, United States?

RevenueBase identified 40 defense cybersecurity companies headquartered in Reston, 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?

Peraton, headquartered in Reston, tops this list with the largest team on record.

Which city has the most defense cybersecurity companies?

Washington leads with 86 headquartered companies, followed by New York (78) and Austin (61).

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 1,355 verified decision-maker contacts tracked across these 40 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 14, 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 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.