Company lists · Data refreshed September 2026

Top 25 Cybersecurity service providers based in the United States

Name: Cybersecurity service providers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 8,805 companies tracked

RevenueBase identified 8,805 cybersecurity service providers headquartered in the United States as of September 2026 and tracks 161,848 professional contacts across them, including 65,126 with verified work emails and 54,874 with mobile numbers. New York is the largest hub.

This list covers cybersecurity service providers headquartered in the 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 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

8,805Companies

161,848Contacts tracked

65,126Verified emails

54,874Mobile numbers

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The 25 largest cybersecurity service providers based in the United States

Ranked by team size

Top 25 of 8,805 cybersecurity service providers based in the United States, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity service providers: 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	Symantec	Strong evidence	San Jose, CA, United States	10001+	11,179 contacts →
	Strong evidence “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Source: RevenueBase Database · checked Sep 1, 2026
2	Trellix	Strong evidence	Plano, TX, United States	1,001-5,000	3,490 contacts →
	Strong evidence “Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.” Source: RevenueBase Database · checked Sep 1, 2026
3	OPTIV	Indirect evidence	Chantilly, VA, United States	1,001-5,000	2,206 contacts →
	Indirect evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 1, 2026
4	Bitdefender	Strong evidence	Fort Lauderdale, FL, United States	1,001-5,000	2,141 contacts →
	Strong evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Sep 1, 2026
5	Barracuda	Strong evidence	Alpharetta, GA, United States	1,001-5,000	2,108 contacts →
	Strong evidence “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Source: RevenueBase Database · checked Sep 1, 2026
6	Fortra	Strong evidence	Eden Prairie, MN, United States	1,001-5,000	1,640 contacts →
	Strong evidence “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Source: RevenueBase Database · checked Sep 1, 2026
7	Thales Cybersecurity Products	Strong evidence	Austin, TX, United States	1,001-5,000	1,252 contacts →
	Strong evidence “Thales is a global leader in cybersecurity, helping the most trusted organizations in the world protect their most critical applications, data, and identities anywhere at scale.” Source: RevenueBase Database · checked Sep 1, 2026
8	Guidepoint Security	Strong evidence	Tampa, FL, United States	1,001-5,000	1,234 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 1, 2026
9	Imperva	Indirect evidence	Austin, TX, United States	10001+	1,211 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 1, 2026
10	Watchguard Technologies	Indirect evidence	Seattle, WA, United States	1,001-5,000	1,054 contacts →
	Indirect evidence “WatchGuard® Technologies, Inc.” Source: RevenueBase Database · checked Sep 1, 2026
11	Coalfire	Strong evidence	Chicago, IL, United States	1,001-5,000	960 contacts →
	Strong evidence “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: RevenueBase Database · checked Sep 1, 2026
12	Netenrich	Indirect evidence	San Jose, CA, United States	501-1,000	885 contacts →
	Indirect evidence “Netenrich is redefining security operations by shifting the focus from "efficiency"(speed) to "efficacy"(comprehensive coverage).” Source: RevenueBase Database · checked Sep 1, 2026
13	TPX	Indirect evidence	South San Francisco, CA, United States	1,001-5,000	767 contacts →
	Indirect evidence “TPx is the reliable sidekick every growing business deserves, powering your tech while you take the lead.” Source: RevenueBase Database · checked Sep 1, 2026
14	Bitsight	Indirect evidence	Raleigh, NC, United States	501-1,000	753 contacts →
	Indirect evidence “Bitsight is the global leader in cyber risk intelligence, leveraging advanced AI to empower organizations with precise insights derived from the industry’s most extensive external…” Source: RevenueBase Database · checked Sep 1, 2026
15	Coalition, INC	Indirect evidence	San Francisco, CA, United States	501-1,000	719 contacts →
	Indirect evidence “Coalition is the world's first Active Insurance provider designed to help prevent digital risk before it strikes.” Source: RevenueBase Database · checked Sep 1, 2026
16	Huntress	Indirect evidence	Columbia, MD, United States	501-1,000	694 contacts →
	Indirect evidence “Protect Your Endpoints, Identities, Logs, and Employees.” Source: RevenueBase Database · checked Sep 1, 2026
17	IT Solutions	Indirect evidence	New Orleans, LA, United States	501-1,000	680 contacts →
	Indirect evidence “With 30 years of experience as a trusted managed services provider, we're your dedicated partner in navigating the complex world of technology, so you can focus on growing your…” Source: RevenueBase Database · checked Sep 1, 2026
18	Telos Corporation	Indirect evidence	Las Vegas, NV, United States	501-1,000	636 contacts →
	Indirect evidence “Telos empowers and protects the world’s most security-conscious organizations with solutions for continuous security assurance of individuals, systems, and information.” Source: RevenueBase Database · checked Sep 1, 2026
19	Vikingcloud	Strong evidence	Chicago, IL, United States	1,001-5,000	618 contacts →
	Strong evidence “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: RevenueBase Database · checked Sep 1, 2026
20	Levelblue	Indirect evidence	Dallas, TX, United States	1,001-5,000	582 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 1, 2026
21	Integris	Indirect evidence	Denver, CO, United States	501-1,000	575 contacts →
	Indirect evidence “Integris is a national leader in future-ready Managed Services, delivering innovative solutions that drive digital maturity for small and midsize businesses.” Source: RevenueBase Database · checked Sep 1, 2026
22	Dragos, INC	Strong evidence	Houston, TX, United States	501-1,000	544 contacts →
	Strong evidence “Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Source: RevenueBase Database · checked Sep 1, 2026
23	Securityscorecard	Indirect evidence	New York, NY, United States	501-1,000	529 contacts →
	Indirect evidence “Funded by world-class investors, including Evolution Equity Partners, Silver Lake Partners, Sequoia Capital, GV, Riverwood Capital, and others, SecurityScorecard is the global…” Source: RevenueBase Database · checked Sep 1, 2026
24	Vc3	Strong evidence	Memphis, TN, United States	501-1,000	517 contacts →
	Strong evidence “VC3 is a managed IT and cybersecurity services provider serving organizations throughout the US and Canada.” Source: RevenueBase Database · checked Sep 1, 2026
25	Ultraviolet Cyber	Indirect evidence	Phoenix, AZ, United States	501-1,000	517 contacts →
	Indirect evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program.” Source: RevenueBase Database · checked Sep 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 service providers. 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 service providers.
Partial evidence: Its own public description names part of cybersecurity service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity service providers. 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 8,805 cybersecurity service providers based in the United States

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Cybersecurity service providers based in the United States at a glance

As of Sep 1, 2026

40.2%Verified-email coverage

33.9%Mobile-number coverage

18.4Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · New York

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

4,893

11-50

2,837

51-200

764

201-500

159

501-1,000

1,001-5,000

10001+

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 service providers, 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 the United States whose own description of what they do matches “cybersecurity service providers”. 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 service providers), 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 service providers, and records with no verified work email. Companies headquartered outside United States 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, 65,126 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 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 service providers by metro

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 service providers, 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 service providers are there based in the United States?

RevenueBase identified 8,805 cybersecurity service providers headquartered in the 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?

Symantec, headquartered in San Jose, tops this list with the largest team on record.

Which city has the most cybersecurity service providers?

New York leads with 273 headquartered companies, followed by Houston (165) and Miami (146).

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 65,126 verified decision-maker contacts tracked across these 8,805 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 1, 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.