Company lists · Data refreshed September 2026

Top 25 Appsec companies based in New York, United States

Name: Appsec 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 21, 2026 123 companies tracked

RevenueBase identified 123 appsec companies headquartered in New York, United States as of September 2026 and tracks 3,072 professional contacts across them, including 1,017 with verified work emails. San Francisco is the largest hub.

This list covers appsec 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 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

123Companies

3,072Contacts tracked

1,017Verified emails

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The 25 largest appsec companies based in New York, United States

Ranked by team size

Top 25 of 123 appsec companies 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 appsec 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	Securityscorecard	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
2	Certik	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	190 contacts →
	Indirect evidence “CertiK is the largest Web3 security services provider, founded in December 2017 in New York by two professors from Yale and Columbia University.” Source: RevenueBase Database · checked Sep 21, 2026
3	OX Security	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	168 contacts →
	Indirect evidence “OX Security removes risk at the source - eliminating exposures from AI code generation through cloud runtime - preventing security debt before it ever reaches production.” Source: RevenueBase Database · checked Sep 21, 2026
4	Zafran Security	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	139 contacts →
	Indirect evidence “Zafran is an AI-native exposure management platform that eliminates the manual toil of vulnerability management by cutting through noise, revealing what is truly exploitable, and…” Source: RevenueBase Database · checked Sep 21, 2026
5	Breachlock, INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	134 contacts →
	Indirect evidence “BreachLock is a global leader in Continuous Attack Surface Discovery and Penetration Testing.” Source: RevenueBase Database · checked Sep 21, 2026
6	Apiiro	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	117 contacts →
	Strong evidence “Apiiro Guardian Agent secures agentic development with the context and memory layer provided by the AppSec Data Fabric.” Source: RevenueBase Database · checked Sep 21, 2026
7	Panorays	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
8	Oligo Security	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	105 contacts →
	Indirect evidence “Oligo is the industry's leading runtime security platform that solves today's toughest challenge: stopping attacks in real time in the AI era.” Source: RevenueBase Database · checked Sep 21, 2026
9	Trail Of Bits	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
10	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
11	Orchid Security	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	65 contacts →
	Indirect evidence “Orchid delivers an identity-first security orchestration platform.” Source: RevenueBase Database · checked Sep 21, 2026
12	Seal Security	Strong evidence	New York, United StatesHQ checked Sep 21, 2026	11-50	60 contacts →
	Strong evidence “Seal Security’s AppSec Remediation Agent delivers real, human-vetted, production-ready fixes for open source vulnerabilities - resolving risk directly in your applications without…” Source: RevenueBase Database · checked Sep 21, 2026
13	Nsknox	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	57 contacts →
	Indirect 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 21, 2026
14	Docontrol	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	57 contacts →
	Indirect evidence “DoControl is a SaaS Security Posture Management (SSPM) solution offering visibility, threat detection, and remediation for sensitive data exposure and insider threats.” Source: RevenueBase Database · checked Sep 21, 2026
15	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
16	Dune Security	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	53 contacts →
	Indirect evidence “Dune Security prevents social engineering and insider threats across every channel.” Source: RevenueBase Database · checked Sep 21, 2026
17	Valence Security	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	46 contacts →
	Indirect evidence “Valence protects organizations from threats created by SaaS and AI sprawl.” Source: RevenueBase Database · checked Sep 21, 2026
18	Reveald	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	38 contacts →
	Indirect evidence “Reveald is making Exposure Management a reality to solve the biggest challenges in cybersecurity with a trailblazing ‘offense to defense’ approach that gives the advantage back to…” Source: RevenueBase Database · checked Sep 21, 2026
19	OSEC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
20	Zecurion	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	34 contacts →
	Indirect evidence “Established in 2001, Zecurion has emerged as a worldwide authority in IT security solutions, safeguarding the interests of more than corporate clients spanning across 70+…” Source: RevenueBase Database · checked Sep 21, 2026
21	Nopsec	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	33 contacts →
	Indirect evidence “Vulnerability assessment scanners are adept at finding security flaws, but they leave professionals with chaotic lists of vulnerabilities to sift through.” Source: RevenueBase Database · checked Sep 21, 2026
22	Calcom	Indirect evidence	New York, United StatesHQ checked Sep 21, 2026	11-50	31 contacts →
	Indirect evidence “Established in 2001 CalCom positioned itself as a leading provider of unique hardening automation tools that address both the needs of IT and Security teams.” Source: RevenueBase Database · checked Sep 21, 2026
23	RED Balloon Security, INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	29 contacts →
	Indirect 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 21, 2026
24	Illusive	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	23 contacts →
	Indirect evidence “Illusive was acquired by Proofpoint.” Source: RevenueBase Database · checked Sep 21, 2026
25	Defensx	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	22 contacts →
	Indirect evidence “In today’s world - everything we do revolves around the browser.” 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: appsec 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 appsec companies.
Partial evidence: Its own public description names part of appsec companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name appsec 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 123 appsec companies based in New York, United States

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Appsec companies based in New York, United States at a glance

As of Sep 21, 2026

33.1%Verified-email coverage

25.0Average contacts per company

11-50Median size (employees)

117.9%Largest-city concentration · San Francisco

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

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 123 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 appsec 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 “appsec 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 appsec 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 appsec 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, 1,017 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.

Appsec companies 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 appsec 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 appsec companies are there based in New York, United States?

RevenueBase identified 123 appsec 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?

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

Which city has the most appsec companies?

San Francisco leads with 145 headquartered companies, followed by New York (123) and Austin (93).

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 1,017 verified decision-maker contacts tracked across these 123 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.