Company lists · Data refreshed September 2026

Top 25 Manhattan cybersecurity firms based in the United States

Name: Manhattan cybersecurity firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 750 companies tracked

RevenueBase identified 750 manhattan cybersecurity firms headquartered in the United States as of September 2026 and tracks 9,051 professional contacts across them, including 3,730 with verified work emails. New York is the largest hub.

This list covers manhattan cybersecurity firms 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 21, 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 21, 2026 86% judged on-target in blind review

750Companies

9,051Contacts tracked

3,730Verified emails

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The 25 largest manhattan cybersecurity firms based in the United States

Ranked by team size

Top 25 of 750 manhattan cybersecurity firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to manhattan cybersecurity firms: 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	Trustwave, A Levelblue Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	501-1,000	874 contacts →
	Partial evidence “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: RevenueBase Database · checked Sep 21, 2026
2	Ultraviolet Cyber	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	501-1,000	523 contacts →
	Indirect evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Source: RevenueBase Database · checked Sep 21, 2026
3	Security Risk Advisors	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 21, 2026	201-500	315 contacts →
	Partial evidence “We deliver cybersecurity consulting, 24x7 operations and SaaS to leading companies in the Financial Services, Healthcare, Pharmaceuticals, Technology and Retail industries.” Source: RevenueBase Database · checked Sep 21, 2026
4	Lumifi	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 21, 2026	51-200	249 contacts →
	Indirect evidence “Lumifi Cyber helps organizations illuminate their cyber defense with continuous protection across the full security lifecycle.” Source: RevenueBase Database · checked Sep 21, 2026
5	Loginsoft	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	201-500	220 contacts →
	Partial evidence “For over 20 years, leading companies in Telecom, Cybersecurity, Healthcare, Banking, New Media, and more have come to rely on Loginsoft as a trusted resource for technology talent.” Source: RevenueBase Database · checked Sep 21, 2026
6	Mindpoint Group, A Quantum SKY Company	Partial evidence	Reston, VA, United StatesHQ checked Sep 21, 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 21, 2026
7	Safeaeon INC	Partial evidence	Pleasanton, CA, United StatesHQ checked Sep 21, 2026	51-200	196 contacts →
	Partial evidence “SafeAeon leads the industry as a top-tier Cybersecurity-as-a-Service provider, delivering 24x7 premium Managed Security Services with AI-powered and human-driven 24x7 SOC…” Source: RevenueBase Database · checked Sep 21, 2026
8	Deepseas	Indirect evidence	Globally Distributed, United StatesHQ checked Sep 21, 2026	201-500	182 contacts →
	Indirect evidence “With 30 years of experience in cyber defense, DeepSeas is trusted by nearly clients around the world, including Fortune 100 enterprises and mid-market organizations, municipality…” Source: RevenueBase Database · checked Sep 21, 2026
9	Cypfer	Indirect evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	51-200	178 contacts →
	Indirect evidence “Global Cyber Certainty Champions, in an uncertain digital world.” Source: RevenueBase Database · checked Sep 21, 2026
10	Cyber Advisors	Indirect evidence	Maple Grove, MN, United StatesHQ checked Sep 21, 2026	201-500	176 contacts →
	Indirect evidence “Cyber Advisors is a nationwide leader in cyber security, providing a comprehensive range of Offensive, Defensive, and Risk Management services.” Source: RevenueBase Database · checked Sep 21, 2026
11	Nuharbor	Partial evidence	Colchester, VT, United StatesHQ checked Sep 21, 2026	51-200	151 contacts →
	Partial evidence “nuHarbor is a U.S-based cybersecurity firm trusted by public sector and critical infrastructure organizations nationwide.” Source: RevenueBase Database · checked Sep 21, 2026
12	SOLIS	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	51-200	137 contacts →
	Indirect evidence “Solis is a leading provider of managed cyber security services and cyber incident response.” Source: RevenueBase Database · checked Sep 21, 2026
13	Kudu Dynamics LLC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	51-200	113 contacts →
	Indirect evidence “Those who play with the devil's toys will be brought by degrees to wield his sword.~ R.” Source: RevenueBase Database · checked Sep 21, 2026
14	Ioactive, INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 21, 2026	51-200	107 contacts →
	Indirect evidence “IOActive is a trusted partner for Global enterprises, providing research-fueled security services across all industries.” Source: RevenueBase Database · checked Sep 21, 2026
15	Shorepoint INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	n/a	106 contacts →
	Partial evidence “ShorePoint recognizes that cybersecurity is the challenge of our generation.” Source: RevenueBase Database · checked Sep 21, 2026
16	Trustedsec	Indirect evidence	Fairlawn, OH, United StatesHQ checked Sep 21, 2026	51-200	102 contacts →
	Indirect evidence “TrustedSec is an end-to-end security consulting company that provides customized services to build client-defined success.” Source: RevenueBase Database · checked Sep 21, 2026
17	1force	Indirect evidence	Hilton Head Island, SC, United StatesHQ checked Sep 21, 2026	11-50	99 contacts →
	Indirect evidence “For more than 15 years, 1FORCE has been a steadfast supporter of dynamic and demanding programs within the federal sector, with a specific focus on National Security.” Source: RevenueBase Database · checked Sep 21, 2026
18	Defy Security	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 21, 2026	51-200	89 contacts →
	Partial evidence “Defy Security was founded in 2017 with one primary goal: to change the cybersecurity buying experience by delivering value and service that is unmatched.” Source: RevenueBase Database · checked Sep 21, 2026
19	Vertek Corporation	Partial evidence	Burlington, VT, United StatesHQ checked Sep 21, 2026	51-200	81 contacts →
	Partial evidence “At Vertek, we deliver advanced cybersecurity solutions that empower businesses to protect their digital assets and achieve peace of mind.” Source: RevenueBase Database · checked Sep 21, 2026
20	Techguard Security	Partial evidence	O'fallon, IL, United StatesHQ checked Sep 21, 2026	51-200	80 contacts →
	Partial evidence “Our Cybersecurity Specialists are highly educated and certified professionals who have utilized their extensive IT security experience to support both Fortune 500 businesses and…” Source: RevenueBase Database · checked Sep 21, 2026
21	Redlegg	Indirect evidence	St. Charles, IL, United StatesHQ checked Sep 21, 2026	51-200	68 contacts →
	Indirect evidence “We've been serving and defending businesses since 2008 as trusted, personable guides in this complex, ever-changing, high-stakes field-MSSP Alert's Top 50 MSSPs Of 2020 -LogRhythm…” Source: RevenueBase Database · checked Sep 21, 2026
22	Apollo Information Systems	Partial evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	51-200	64 contacts →
	Partial evidence “Apollo Information Systems delivers intelligence-led cybersecurity solutions for government agencies, educational institutions, and enterprises.” Source: RevenueBase Database · checked Sep 21, 2026
23	Infosight, INC	Indirect evidence	Miami Lakes, FL, United StatesHQ checked Sep 21, 2026	11-50	63 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
24	Cyber Defense Technologies	Indirect evidence	Dulles, VA, United StatesHQ checked Sep 21, 2026	11-50	61 contacts →
	Indirect evidence “We specialize in providing comprehensive cyber security solutions by leveraging our information security background in the GovCon and military experiences to serve the federal…” Source: RevenueBase Database · checked Sep 21, 2026
25	Sandtech Solutions	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 21, 2026	11-50	58 contacts →
	Indirect evidence “SandTech Solutions is a Certified 8a member as well as a Service Disabled Veteran-Owned Small Business (SDVOSB).” Source: RevenueBase Database · checked Sep 21, 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: manhattan 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 manhattan cybersecurity firms.
Partial evidence: Its own public description names part of manhattan cybersecurity firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name manhattan 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 750 manhattan cybersecurity firms based in the United States

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Manhattan cybersecurity firms based in the United States at a glance

As of Sep 21, 2026

41.2%Verified-email coverage

12.1Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

419

11-50

250

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 750 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 manhattan 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 the United States whose own description of what they do matches “manhattan 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 manhattan 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 manhattan cybersecurity firms, 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, 3,730 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 21, 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.

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 manhattan 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 manhattan cybersecurity firms are there based in the United States?

RevenueBase identified 750 manhattan cybersecurity firms 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?

Trustwave, A Levelblue Company, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most manhattan cybersecurity firms?

New York leads with 21 headquartered companies, followed by Houston (13) and Los Angeles (13).

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 3,730 verified decision-maker contacts tracked across these 750 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 21, 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.