Company lists · Data refreshed September 2026
Top 25 Cybersecurity firms based in Reston, United States
RevenueBase identified 69 cybersecurity firms headquartered in Reston, United States as of September 2026 and tracks 4,040 professional contacts across them, including 1,374 with verified work emails. New York is the largest hub.
This list covers cybersecurity firms 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.
The 25 largest cybersecurity firms based in Reston, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,232 contacts → | ||||
Strong 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, 2026Thanks. The Data Team will review it. | |||||
| 2 | 872 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 369 contacts → | ||||
Indirect evidence “As of April 2023, Paladion is part of Atos Group.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 204 contacts → | ||||
Strong evidence “MindPoint Group, a Quantum Sky company, is a cybersecurity specialist trusted by U.S.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 185 contacts → | ||||
Indirect evidence “Intelligent Waves, a veteran-owned organization, delivers secure, innovative technology solutions for federal defense and intelligence missions.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 103 contacts → | ||||
Indirect evidence “We stand in the breach so you don’t have to.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 98 contacts → | ||||
Indirect evidence “Neovera helps financial institutions and regulated organizations protect how value moves across money, data, identities, applications, and infrastructure.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 80 contacts → | ||||
Strong evidence “CyberSheath is one of the industry’s few one-stop cybersecurity compliance service providers, going beyond assessment and software licensing to solve the whole problem.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 77 contacts → | ||||
Strong evidence “SecureIT is a leading provider of cybersecurity management consulting and technical services to government agencies, corporations and non-profit organizations.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 70 contacts → | ||||
Indirect evidence “Fortinet Federal is dedicated to bringing expertise and commitment to U.S.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 65 contacts → | ||||
Indirect evidence “Silent Push provides a Preemptive Cyber Defense platform that gives real-time visibility into previously unknown adversary infrastructure.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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, 2026Thanks. The Data Team will review it. | |||||
| 14 | 55 contacts → | ||||
Strong evidence “Zen Strategics, a Titan Technologies Company, offers innovative Cybersecurity, Cloud Migration, and Information Technology Modernization solutions.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 50 contacts → | ||||
Indirect evidence “CSS is now Evolver!” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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, 2026Thanks. The Data Team will review it. | |||||
| 17 | 41 contacts → | ||||
Indirect evidence “Analyst1 allows you to take full control of your cyber security with complete visibility into threat activity.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 32 contacts → | ||||
Strong evidence “A Veteran-Owned Small Business that brings CyberSecurity and Internet of Things solutions to civilian and government clientele.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 29 contacts → | ||||
Strong 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, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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, 2026Thanks. The Data Team will review it. | |||||
| 21 | 18 contacts → | ||||
Indirect evidence “Founded in 2005 by security veterans, Stratum Security is an information security consulting company that focuses on providing clear and concise risk guidance to its clients…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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, 2026Thanks. The Data Team will review it. | |||||
| 23 | 12 contacts → | ||||
Strong evidence “Stealthpath is a pioneering cybersecurity company, making digital visibility simple and accessible for all to achieve.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 11 contacts → | ||||
Strong evidence “Cloud Security Partners is a human-centered cybersecurity firm enabling organizations to thrive securely.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 10 contacts → | ||||
Indirect evidence “Vinitech is a valued IT security reseller, advisor and integrator.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
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 firms. 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 firms.
- Partial evidence
- Its own public description names part of cybersecurity firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cybersecurity firms. 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 69 cybersecurity firms based in Reston, United States
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Cybersecurity firms based in Reston, United States at a glance
As of Sep 14, 2026Companies by employee count
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 69 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 firms, 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 “cybersecurity firms”. 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 firms), 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 firms, 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, 1,374 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.
Cybersecurity firms by metro in the United States
- Cybersecurity firms in New York332
- Cybersecurity firms in Austin182
- Cybersecurity firms in San Francisco182
- Cybersecurity firms in Washington180
- Cybersecurity firms in Atlanta153
- Cybersecurity firms in Houston142
- Cybersecurity firms in Miami142
- Cybersecurity firms in Dallas134
- Cybersecurity firms in Chicago127
- Cybersecurity firms in Tampa116
- Cybersecurity firms in San Diego92
- Cybersecurity firms in Arlington90
- Cybersecurity firms in Boston87
- Cybersecurity firms in Los Angeles87
- Cybersecurity firms in Columbia77
- Cybersecurity firms in Denver77
- Cybersecurity firms in Las Vegas76
- Cybersecurity firms in Orlando75
- Cybersecurity firms in Seattle71
- Cybersecurity firms in Reston69
- Cybersecurity firms in Charlotte67
- Cybersecurity firms in San Jose66
- Cybersecurity firms in San Antonio64
- Cybersecurity firms in Phoenix63
- Cybersecurity firms in Wilmington57
- Cybersecurity firms in Baltimore55
- Cybersecurity firms in Alexandria51
- Cybersecurity firms in Huntsville50
- Cybersecurity firms in Fairfax49
- Cybersecurity firms in Mclean49
- Cybersecurity firms in Sheridan48
- Cybersecurity firms in Portland43
- Cybersecurity firms in Dover42
- Cybersecurity firms in Raleigh42
- Cybersecurity firms in Ashburn41
- Cybersecurity firms in Colorado Springs40
- Cybersecurity firms in Herndon40
- Cybersecurity firms in Philadelphia40
- Cybersecurity firms in Fort Lauderdale39
- Cybersecurity firms in Pittsburgh39
- Cybersecurity firms in Plano38
- Cybersecurity firms in Scottsdale37
- Cybersecurity firms in Palo Alto35
- Cybersecurity firms in Minneapolis34
- Cybersecurity firms in Nashville32
- Cybersecurity firms in Indianapolis30
- Cybersecurity firms in Richmond30
- Cybersecurity firms in Vienna30
- Cybersecurity firms in Alpharetta29
- Cybersecurity firms in Irvine29
- Cybersecurity firms in Columbus28
- Cybersecurity firms in Salt Lake City28
- Cybersecurity firms in Santa Clara28
- Cybersecurity firms in Leesburg26
- Cybersecurity firms in Sunnyvale26
- Cybersecurity firms in Albuquerque25
- Cybersecurity firms in Bethesda25
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 cybersecurity firms, 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 cybersecurity firms are there based in Reston, United States?
RevenueBase identified 69 cybersecurity firms 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?
Guidepoint Security, headquartered in Reston, tops this list with the largest team on record.
Which city has the most cybersecurity firms?
New York leads with 332 headquartered companies, followed by Austin (182) and San Francisco (182).
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 1,374 verified decision-maker contacts tracked across these 69 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.