Company lists · Data refreshed September 2026

Top 24 Cybersecurity services firms based in New York, United States

Name: Cybersecurity services firms based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 257 companies tracked

RevenueBase identified 257 cybersecurity services firms headquartered in New York, United States as of September 2026 and tracks 5,279 professional contacts across them, including 1,931 with verified work emails. New York is the largest hub.

This list covers cybersecurity services firms headquartered in New York, 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

257Companies

5,279Contacts tracked

1,931Verified emails

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The 24 largest cybersecurity services firms based in New York, United States

Ranked by team size

Top 24 of 257 cybersecurity services firms based in New York, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity services 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	Bluevoyant	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	501-1,000	683 contacts →
	Indirect evidence “BlueVoyant’s Cyber Defense Platform (CDP) integrates MDR, TPRM, and DRP into a seamless, scalable solution.” Source: RevenueBase Database · checked Sep 14, 2026
2	Securityscorecard	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	501-1,000	535 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 14, 2026
3	XTIUM	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	501-1,000	478 contacts →
	Indirect evidence “XTIUM, created through the business combination of ATSG and Evolve IP, delivers a modern security-first approach to the managed IT services experience.” Source: RevenueBase Database · checked Sep 14, 2026
4	Stroz Friedberg, A Levelblue Company	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	501-1,000	206 contacts →
	Indirect evidence “Stroz Friedberg is now LevelBlue, the world's largest pure-play Managed Security Services Provider (MSSP).” Source: RevenueBase Database · checked Sep 14, 2026
5	AGIO	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	201-500	200 contacts →
	Strong evidence “Agio is a hybrid cybersecurity and managed IT organization that combines predictive intelligence with human brilliance to empower clients with next-generation cyber protection and…” Source: RevenueBase Database · checked Sep 14, 2026
6	Harbor IT	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	201-500	163 contacts →
	Strong evidence “Harbor IT helps organizations secure, operate, and scale through integrated IT, cybersecurity, AI, and cloud services.” Source: RevenueBase Database · checked Sep 14, 2026
7	Cyberrisk Alliance	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	119 contacts →
	Strong evidence “CyberRisk Alliance (CRA) was formed to help cybersecurity professionals face the challenges and obstacles that threaten the success and prosperity of their organizations.” Source: RevenueBase Database · checked Sep 14, 2026
8	Panorays	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	117 contacts →
	Indirect evidence “Panorays is a leading provider of third-party cyber risk management solutions, helping businesses optimize their defenses for each unique third-party relationship.” Source: RevenueBase Database · checked Sep 14, 2026
9	Morphisec	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	104 contacts →
	Indirect evidence “We empower organizations with resilient, self-healing capabilities that prevent and neutralize even the most advanced cyber threats.” Source: RevenueBase Database · checked Sep 14, 2026
10	Trail Of Bits	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	94 contacts →
	Indirect evidence “Since 2012, Trail of Bits has been the premier place for security experts to boldly advance security and address technology’s newest and most challenging risks.” Source: RevenueBase Database · checked Sep 14, 2026
11	Cyber City	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	11-50	80 contacts →
	Indirect evidence “Cyber City inc.” Source: RevenueBase Database · checked Sep 14, 2026
12	Nopalcyber	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	76 contacts →
	Strong evidence “NopalCyber makes cybersecurity manageable, affordable, reliable, and powerful for companies that need to be resilient and compliant.” Source: RevenueBase Database · checked Sep 14, 2026
13	Eretmis INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	n/a	66 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
14	Revelsi	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	65 contacts →
	Strong evidence “RevelSI is a global cybersecurity, AI, software, and infrastructure services organization.” Source: RevenueBase Database · checked Sep 14, 2026
15	Altourage	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	58 contacts →
	Strong evidence “Altourage is a New York City-based managed IT and cybersecurity provider built for organizations that operate in high-stakes, fast-moving environments.” Source: RevenueBase Database · checked Sep 14, 2026
16	Nsknox	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	11-50	57 contacts →
	Strong evidence “nsKnox is a cybersecurity company focused on Corporate Payment Security, founded and led by Alon Cohen, Founder & former CEO of CyberArk (NASDAQ: CYBR).” Source: RevenueBase Database · checked Sep 14, 2026
17	BIG Idea Technology	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	11-50	57 contacts →
	Indirect evidence “Big Idea Technology manages IT for small businesses headquartered in the New York City metropolitan area.” Source: RevenueBase Database · checked Sep 14, 2026
18	Rhymetec	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	11-50	56 contacts →
	Strong evidence “Rhymetec delivers premium cybersecurity and data privacy solutions for modern SaaS businesses, combining human expertise with innovative technology.” Source: RevenueBase Database · checked Sep 14, 2026
19	Port53	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	55 contacts →
	Indirect evidence “Port53 Technologies is The Global Leader in Cisco-Based Managed Security Operations, helping organizations modernize and secure their digital environments through advanced…” Source: RevenueBase Database · checked Sep 14, 2026
20	White Wings Technologies	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	51-200	54 contacts →
	Strong evidence “White Wings Technologies is a forward-thinking IT solutions provider, specializing in cloud computing, cybersecurity, managed IT services, and strategic IT consulting.” Source: RevenueBase Database · checked Sep 14, 2026
21	Converge Insurance	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	11-50	47 contacts →
	Indirect evidence “Converge fuses cyber insurance, security and technology to provide businesses with clear, confident cyber protection.” Source: RevenueBase Database · checked Sep 14, 2026
22	Proven Data	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	11-50	38 contacts →
	Indirect evidence “Founded in 2011, Proven Data has consistently evolved to meet the growing needs of our clients.” Source: RevenueBase Database · checked Sep 14, 2026
23	OSEC	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	11-50	38 contacts →
	Indirect evidence “We're the security consultants Fortune 500s call when they're in real trouble, the ones who find what others miss, who speak CEO and CISO fluently.” Source: RevenueBase Database · checked Sep 14, 2026
24	Ciphertechs A Cybermaxx Company	Strong evidence	New York, United StatesHQ checked Sep 14, 2026	51-200	28 contacts →
	Strong evidence “CipherTechs is now part of CyberMaxx, a tech-enabled cybersecurity service provider.” 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: cybersecurity services 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 services firms.
Partial evidence: Its own public description names part of cybersecurity services firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity services 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 24 of 257 cybersecurity services firms based in New York, United States

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Cybersecurity services firms based in New York, United States at a glance

As of Sep 14, 2026

36.6%Verified-email coverage

20.5Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · New York

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

120

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 257 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 services 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 New York, United States whose own description of what they do matches “cybersecurity services 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 services 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 services firms, and records with no verified work email. Companies headquartered outside New York 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, 1,931 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 services firms 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 cybersecurity services 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 services firms are there based in New York, United States?

RevenueBase identified 257 cybersecurity services firms headquartered in New York, 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?

Bluevoyant, headquartered in New York, tops this list with the largest team on record.

Which city has the most cybersecurity services firms?

New York leads with 257 headquartered companies, followed by Washington (154) and Austin (153).

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 1,931 verified decision-maker contacts tracked across these 257 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.