Company lists · Data refreshed September 2026
Top 25 Security auditing firms based in New York, United States
RevenueBase identified 86 security auditing firms headquartered in New York, United States as of September 2026 and tracks 1,808 professional contacts across them, including 553 with verified work emails. New York is the largest hub.
This list covers security auditing 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, how directly it supports the match, and when it was last checked. Data refreshed September 6, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.
The 25 largest security auditing firms based in New York, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 535 | ||||
“Funded by world-class investors, including Evolution Equity Partners, Silver Lake Partners, Sequoia Capital, GV, Riverwood Capital, and others, SecurityScorecard is the global…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 268 | ||||
“We stand at the forefront of leadership, insight, and guidance in a world marked by complexity and uncertainty.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 243 | ||||
“Thoropass is the only end-to-end cybersecurity auditor.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 163 | ||||
“Harbor IT helps organizations secure, operate, and scale through integrated IT, cybersecurity, AI, and cloud services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 76 | ||||
“NopalCyber makes cybersecurity manageable, affordable, reliable, and powerful for companies that need to be resilient and compliant.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 66 | ||||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 38 | ||||
“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: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Vista InfosecPartial evidence | 32 | |||
“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: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 28 | ||||
“CipherTechs is now part of CyberMaxx, a tech-enabled cybersecurity service provider.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 21 | ||||
“Gotham Digital Science (GDS) was acquired in 2016 by Stroz Friedberg, an Aon company.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 19 | ||||
“ACA Aponix, a division of ACA Group, provides cybersecurity and technology risk assessments, vendor and M&A diligence services, network testing, and advisory services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | Silent BreachIndirect evidence | 12 | |||
“At Silent Breach, we think like a hacker and defend like a pro.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 11 | ||||
“Top notch services at reasonable cost RGS Global Advisors has a wealth of internal audit, FDICIA and SOX testing, remediation, consultancy, BSA/AML/OFAC, IT/IS/Cybersecurity &…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 11 | ||||
“CompCiti has been providing IT auditing, compliance, security and management services for over 20 years.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | Resonance SecurityPartial evidence | 9 | |||
“Resonance Security offers full spectrum cybersecurity aggregation software for institutions and individuals that makes protecting against any cybersecurity threat effortless no…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 8 | ||||
“Sayfer, where people and technology meet to overcome web3 and blockchain challenges.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 7 | ||||
“Sniper Watch is an AI-powered cybersecurity and technology advisory + tactical deployment firm that helps organizations protect revenue, reduce risk, and scale operations in…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | password.nycPartial evidence | 6 | |||
“We are a company specialized in information security.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 | ||||
“Most organizations face growing compliance demands but lack an IT partner who truly understands them.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Nathanial RandIndirect evidence | 5 | |||
“Nathanial Rand, Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 | ||||
“Hacker Simulations delivers advanced penetration testing and offensive security services for organizations that require real assurance, not checkbox security.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 | ||||
“Velstadt is a cybersecurity provider focused on delivering both offensive and defensive security services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 4 | ||||
“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: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 | ||||
“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: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 | ||||
“BrothersKeep is a boutique cybersecurity services firm with offices in New York and Israel, providing a full portfolio of enterprise-class cybersecurity solutions to businesses of…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 86 security auditing firms based in New York, United States
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Security auditing firms based in New York, United States at a glance
As of Sep 6, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for New York, over 86 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 security auditing firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “security auditing firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among security auditing 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 an evidence 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, 553 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 6, 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.
Security auditing firms by metro in the United States
- Security auditing firms in New York86
- Security auditing firms in Atlanta77
- Security auditing firms in Austin67
- Security auditing firms in Houston66
- Security auditing firms in Tampa64
- Security auditing firms in Washington64
- Security auditing firms in Chicago58
- Security auditing firms in Dallas54
- Security auditing firms in Miami50
- Security auditing firms in San Francisco50
- Security auditing firms in Los Angeles43
- Security auditing firms in San Diego36
- Security auditing firms in Arlington33
- Security auditing firms in Charlotte32
- Security auditing firms in Seattle31
- Security auditing firms in Las Vegas27
- Security auditing firms in Columbia26
- Security auditing firms in Denver26
Frequently asked
How many security auditing firms are there based in New York, United States?
RevenueBase identified 86 security auditing 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?
Securityscorecard, headquartered in New York, tops this list with the largest team on record.
Which city has the most security auditing firms?
New York leads with 86 headquartered companies, followed by Atlanta (77) and Austin (67).
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 553 verified decision-maker contacts tracked across these 86 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 6, 2026.
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Security auditing firms by geography
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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 SmartSearch, 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.
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