Company lists · Data refreshed September 2026

Top 23 IT security consulting services based in New York, United States

Name: IT security consulting services 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 21, 2026 296 companies tracked

RevenueBase identified 296 IT security consulting services headquartered in New York, United States as of September 2026 and tracks 3,565 professional contacts across them, including 1,302 with verified work emails. New York is the largest hub.

This list covers IT security consulting services 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 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

296Companies

3,565Contacts tracked

1,302Verified emails

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The 23 largest IT security consulting services based in New York, United States

Ranked by team size

Top 23 of 296 IT security consulting services based in New York, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to IT security consulting services: 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	XTIUM	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	478 contacts →
	Strong 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 21, 2026
2	Guidepost Solutions	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	268 contacts →
	Indirect evidence “We stand at the forefront of leadership, insight, and guidance in a world marked by complexity and uncertainty.” Source: RevenueBase Database · checked Sep 21, 2026
3	Kraft & Kennedy, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	219 contacts →
	Partial evidence “Kraft Kennedy is a multidisciplinary technology and management consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
4	AGIO	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	200 contacts →
	Partial 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 21, 2026
5	Harbor IT	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	163 contacts →
	Partial evidence “Harbor IT helps organizations secure, operate, and scale through integrated IT, cybersecurity, AI, and cloud services.” Source: RevenueBase Database · checked Sep 21, 2026
6	Nopalcyber	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	76 contacts →
	Indirect evidence “NopalCyber makes cybersecurity manageable, affordable, reliable, and powerful for companies that need to be resilient and compliant.” Source: RevenueBase Database · checked Sep 21, 2026
7	Hubspire	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	69 contacts →
	Indirect evidence “HubSpire is an innovative team of management consultants, app developers, designers and digital transformation experts.” Source: RevenueBase Database · checked Sep 21, 2026
8	Eretmis INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	n/a	66 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
9	Altourage	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	58 contacts →
	Partial 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 21, 2026
10	Rhymetec	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	56 contacts →
	Indirect evidence “Rhymetec delivers premium cybersecurity and data privacy solutions for modern SaaS businesses, combining human expertise with innovative technology.” Source: RevenueBase Database · checked Sep 21, 2026
11	Port53	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	55 contacts →
	Partial 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 21, 2026
12	White Wings Technologies	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
13	Agency Cybersecurity	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	49 contacts →
	Partial evidence “Agency replaces traditional security and compliance headcount with AI without replacing your existing tools.” Source: RevenueBase Database · checked Sep 21, 2026
14	Salus GRC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	48 contacts →
	Indirect evidence “At Salus GRC, we offer more than just compliance and cybersecurity services – we provide a personalized commitment to your success.” Source: RevenueBase Database · checked Sep 21, 2026
15	Databasaurus	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	42 contacts →
	Strong evidence “Databasaurus has been a full service IT consulting and support company for over 10 years.” Source: RevenueBase Database · checked Sep 21, 2026
16	Fairdinkum Consulting	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	38 contacts →
	Strong evidence “Fairdinkum is a leading full-service IT consulting firm located in mid-town.” Source: RevenueBase Database · checked Sep 21, 2026
17	OSEC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	38 contacts →
	Partial 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 21, 2026
18	Nodesol Corp	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	37 contacts →
	Partial evidence “NodeSol is the newest incarnation of our parent company, FiberTechOnline, which has been working with US clients for over a decade, providing engineering consulting to small and…” Source: RevenueBase Database · checked Sep 21, 2026
19	Vista Infosec	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	32 contacts →
	Partial evidence “VISTA InfoSec is a vendor-neutral company providing Risk Compliance and Information Security Advisory Services to organizations for the past 20 years (established in 2004).” Source: RevenueBase Database · checked Sep 21, 2026
20	Universal Consulting	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	30 contacts →
	Strong evidence “Universal E-Business Solutions began as an IT Consulting Firm in Since then, Universal has launched a wide range of services including: Low-latency networks, Managed LAN/WAN…” Source: RevenueBase Database · checked Sep 21, 2026
21	Ciphertechs A Cybermaxx Company	Indirect evidence	New York, United StatesHQ checked Sep 21, 2026	51-200	28 contacts →
	Indirect evidence “CipherTechs is now part of CyberMaxx, a tech-enabled cybersecurity service provider.” Source: RevenueBase Database · checked Sep 21, 2026
22	Deeptech, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	26 contacts →
	Partial evidence “DeepTech, your IT solutions partner, is redefining how IT is managed by exceeding the level of service that companies have come to expect from traditional Managed Service…” Source: RevenueBase Database · checked Sep 21, 2026
23	Riverstrong	Partial evidence	New York, United StatesHQ checked Sep 21, 2026	11-50	25 contacts →
	Partial evidence “Riverstrong - your trusted partner in IT and cybersecurity managed services.” 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: IT security consulting services. 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 IT security consulting services.
Partial evidence: Its own public description names part of IT security consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT security consulting services. 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 296 IT security consulting services based in New York, United States

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IT security consulting services based in New York, United States at a glance

As of Sep 21, 2026

36.5%Verified-email coverage

12.0Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

152

11-50

100

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 296 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 IT security consulting services, 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 “IT security consulting services”. 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 IT security consulting services), 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 IT security consulting services, 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, 1,302 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.

IT security consulting services 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 IT security consulting services, 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 IT security consulting services are there based in New York, United States?

RevenueBase identified 296 IT security consulting services 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?

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

Which city has the most IT security consulting services?

New York leads with 296 headquartered companies, followed by Houston (185) and Atlanta (180).

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 1,302 verified decision-maker contacts tracked across these 296 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.