Company lists · Data refreshed September 2026

Top 25 Cybersecurity and defense software companies based in New York, United States

Name: Cybersecurity and defense software companies 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 10, 2026 62 companies tracked

RevenueBase identified 62 cybersecurity and defense software companies headquartered in New York, United States as of September 2026 and tracks 669 professional contacts across them, including 266 with verified work emails and 143 with mobile numbers. New York is the largest hub.

This list covers cybersecurity and defense software companies 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 10, 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 10, 2026 86% judged on-target in blind review

62Companies

669Contacts tracked

266Verified emails

143Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest cybersecurity and defense software companies based in New York, United States

Ranked by team size

Top 25 of 62 cybersecurity and defense software companies based in New York, United States, ranked by team size, largest first. Data refreshed Sep 10, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity and defense software companies: 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	Morphisec	Indirect evidence	New York, NY, United StatesHQ checked Sep 10, 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 10, 2026
2	Nopalcyber	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	51-200	76 contacts →
	Partial evidence “NopalCyber makes cybersecurity manageable, affordable, reliable, and powerful for companies that need to be resilient and compliant.” Source: RevenueBase Database · checked Sep 10, 2026
3	Revelsi	Strong evidence	New York, NY, United StatesHQ checked Sep 10, 2026	51-200	65 contacts →
	Strong evidence “RevelSI is a global cybersecurity, AI, software, and infrastructure services organization.” Source: RevenueBase Database · checked Sep 10, 2026
4	Nsknox	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	11-50	57 contacts →
	Partial 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 10, 2026
5	RED Balloon Security, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	11-50	29 contacts →
	Partial evidence “Red Balloon Security is a leading security provider and research firm committed to defending embedded devices across a range of critical industries and shaping the future of the…” Source: RevenueBase Database · checked Sep 10, 2026
6	Ciphertechs A Cybermaxx Company	Partial evidence	New York, United StatesHQ checked Sep 10, 2026	51-200	28 contacts →
	Partial evidence “CipherTechs is now part of CyberMaxx, a tech-enabled cybersecurity service provider.” Source: RevenueBase Database · checked Sep 10, 2026
7	Unit 221b	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	11-50	16 contacts →
	Partial evidence “Unit 221B is a threat disruption company delivering actionable threat intelligence and cybersecurity solutions that enable enterprises, law enforcement, and government agencies to…” Source: RevenueBase Database · checked Sep 10, 2026
8	Total Defense	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	51-200	15 contacts →
	Partial evidence “Total Defense provides powerful protection from evolving online threats.” Source: RevenueBase Database · checked Sep 10, 2026
9	White Hack Labs	Indirect evidence	New York, NY, United StatesHQ checked Sep 10, 2026	1-10	9 contacts →
	Indirect evidence “Our primary business is the digital security of your assets.” Source: RevenueBase Database · checked Sep 10, 2026
10	Resonance Security	Strong evidence	New York, NY, United StatesHQ checked Sep 10, 2026	11-50	9 contacts →
	Strong evidence “Resonance Security offers full spectrum cybersecurity aggregation software for institutions and individuals that makes protecting against any cybersecurity threat effortless no…” Source: RevenueBase Database · checked Sep 10, 2026
11	Sayfer Cyber Security	Indirect evidence	New York, United StatesHQ checked Sep 10, 2026	11-50	8 contacts →
	Indirect evidence “Sayfer, where people and technology meet to overcome web3 and blockchain challenges.” Source: RevenueBase Database · checked Sep 10, 2026
12	Holistic Cyber Holisticyber	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	51-200	8 contacts →
	Partial evidence “HolistiCyber’s mission is to assist corporations in defending themselves from the new phase of evolution in Cyber threats - not only in volume, but in the level of sophistication.” Source: RevenueBase Database · checked Sep 10, 2026
13	MITG	Indirect evidence	New York, NY, United StatesHQ checked Sep 10, 2026	1-10	7 contacts →
	Indirect evidence “MITG exists because most businesses don't need another security vendor.” Source: RevenueBase Database · checked Sep 10, 2026
14	Worklyn Partners	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	1-10	7 contacts →
	Partial evidence “Worklyn Partners is a holding company that makes control investments in growth-oriented cybersecurity and IT services companies.” Source: RevenueBase Database · checked Sep 10, 2026
15	Firedome	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	11-50	7 contacts →
	Partial evidence “Firedome, a cybersecurity trailblazer, specializes in detection and response solutions for networks and IoT devices tailored for enterprise settings.” Source: RevenueBase Database · checked Sep 10, 2026
16	Decoded Technologies INC	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	11-50	6 contacts →
	Partial evidence “Decoded Solutions is a dynamic tech company with over 10 years of experience providing custom software solutions to businesses in the United States.” Source: RevenueBase Database · checked Sep 10, 2026
17	Kopidion	Indirect evidence	New York, NY, United StatesHQ checked Sep 10, 2026	1-10	5 contacts →
	Indirect evidence “Kopidion consists of highly qualified cyber operations and information security professionals.” Source: RevenueBase Database · checked Sep 10, 2026
18	Option3	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	11-50	5 contacts →
	Partial evidence “Cybersecurity Private Equity Specialist with a National Security Heritage Investment focus is on control transactions in the cyber mid-market Prior portfolios have included…” Source: RevenueBase Database · checked Sep 10, 2026
19	BAY Dynamics	Indirect evidence	New York, NY, United StatesHQ checked Sep 10, 2026	51-200	5 contacts →
	Indirect evidence “Bay Dynamics is now part of Broadcom.” Source: RevenueBase Database · checked Sep 10, 2026
20	Citanex	Indirect evidence	New York, NY, United StatesHQ checked Sep 10, 2026	11-50	4 contacts →
	Indirect evidence “Citanex was founded by a former US Secret Service Electronic Crimes Agent with advisory credentials from Harvard, MIT, and the Department of Justice.” Source: RevenueBase Database · checked Sep 10, 2026
21	Velstadt Cybersecurity	Strong evidence	New York, United StatesHQ checked Sep 10, 2026	11-50	4 contacts →
	Strong evidence “Velstadt is a cybersecurity provider focused on delivering both offensive and defensive security services.” Source: RevenueBase Database · checked Sep 10, 2026
22	Urimagination, INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 10, 2026	11-50	4 contacts →
	Indirect evidence “URimagination (URi) is a premier provider of business infrastructure security solutions and data processing and management for governments and major corporations around the world.” Source: RevenueBase Database · checked Sep 10, 2026
23	Bytium	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	1-10	4 contacts →
	Partial evidence “Bytium LLC is a U.S-registered cybersecurity and IT solutions firm dedicated to helping organizations protect their information assets and maintain operational resilience.” Source: RevenueBase Database · checked Sep 10, 2026
24	Secreliant	Partial evidence	New York, NY, United StatesHQ checked Sep 10, 2026	1-10	3 contacts →
	Partial evidence “SecReliant is managed by a seasoned team – with backgrounds in cybersecurity, technology, blockchain enabled technology, and service in the armed forces – that is passionate…” Source: RevenueBase Database · checked Sep 10, 2026
25	Defenseark Security	Partial evidence	New York, United StatesHQ checked Sep 10, 2026	11-50	2 contacts →
	Partial evidence “DefenseArk houses a suite of products that brings security & privacy to your Identity, Data, Network and the tools needed to defend your Digital Ownership online.” Source: RevenueBase Database · checked Sep 10, 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 and defense software companies. 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 and defense software companies.
Partial evidence: Its own public description names part of cybersecurity and defense software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity and defense software companies. 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 62 cybersecurity and defense software companies based in New York, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 266 reachable decision-makers.

Free signup · no credit card

View the full list →

Cybersecurity and defense software companies based in New York, United States at a glance

As of Sep 10, 2026

39.8%Verified-email coverage

21.4%Mobile-number coverage

10.8Average contacts per company

11-50Median size (employees)

90.3%Largest-city concentration · New York

Sep 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 12.0d

2350–30

3031–60

061–90

090–180

1180+

Company record updated

Median 55.0d

00–30

36631–60

21461–90

5490–180

35180+

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 and defense software companies, 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 and defense software companies”. 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 and defense software companies), 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 and defense software companies, 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, 266 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 10, 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 and defense software companies by metro in the United States

Cybersecurity and defense software companies in New York56
Cybersecurity and defense software companies in Washington53
Cybersecurity and defense software companies in Austin42
Cybersecurity and defense software companies in Columbia39
Cybersecurity and defense software companies in Miami35
Cybersecurity and defense software companies in Arlington35
Cybersecurity and defense software companies in San Francisco34

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 and defense software companies, 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 and defense software companies are there based in New York, United States?

RevenueBase identified 62 cybersecurity and defense software companies 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?

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

Which city has the most cybersecurity and defense software companies?

New York leads with 56 headquartered companies, followed by Washington (53) and Austin (42).

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 266 verified decision-maker contacts tracked across these 62 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 10, 2026.

Ready to reach these companies? Verified emails and direct dials for all 62 cybersecurity and defense software companies based in New York, United States. Start with a free account, no credit card.

Download this list →

Related lists

Cybersecurity and defense software companies by geography

Browse the directory

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.