Company lists · Data refreshed September 2026

Top 25 Security audit firms based in the United States

RevenueBase identified 1,872 security audit firms headquartered in the United States as of September 2026 and tracks 23,350 professional contacts across them, including 10,415 with verified work emails and 8,294 with mobile numbers. New York is the largest hub.

This list covers security audit firms headquartered in the 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 6, 2026 86% judged on-target in blind review
1,872Companies
23,350Contacts tracked
10,415Verified emails
8,294Mobile numbers
Explore all 1,872 companies → Free signup · no credit card · 500 free credits

The 25 largest security audit firms based in the United States

Ranked by team size
Top 25 of 1,872 security audit firms based in the United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names security audit firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
OPTIVIndirect evidence
Leawood, KS, United StatesHQ checked Sep 6, 20261,001-5,0002,222

“Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.”

Source: company website · checked Sep 6, 2026
2
Guidepoint SecurityPartial evidence
Reston, VA, United StatesHQ checked Sep 6, 20261,001-5,0001,232

“GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.”

Source: company website · checked Sep 6, 2026
3
CoalfireIndirect evidence
Chicago, IL, United StatesHQ checked Sep 6, 20261,001-5,000947

“Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.”

Source: company website · checked Sep 6, 2026
4Chicago, IL, United StatesHQ checked Sep 6, 2026501-1,000874

“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.”

Source: company website · checked Sep 6, 2026
5
Network IntelligencePartial evidence
Plano, TX, United StatesHQ checked Sep 6, 2026501-1,000641

“At Network Intelligence, we combine our team of 500+ security professionals with Transilience – our cutting-edge AI platform.”

Source: company website · checked Sep 6, 2026
6
VikingcloudIndirect evidence
Chicago, IL, United StatesHQ checked Sep 6, 20261,001-5,000628

“VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.”

Source: company website · checked Sep 6, 2026
7
Aujas CybersecurityIndirect evidence
Cupertino, CA, United StatesHQ checked Sep 6, 20261,001-5,000473

“At Aujas Cybersecurity, we specialize in building and transforming cybersecurity postures to help businesses effectively mitigate risks.”

Source: company website · checked Sep 6, 2026
8
UpguardIndirect evidence
Mountain View, CA, United StatesHQ checked Sep 6, 2026201-500329

“UpGuard is the only platform that unifies cyber risk management across the vendor supply chain, attack surface, and human workforce.”

Source: company website · checked Sep 6, 2026
9
Prescient SecurityStrong evidence
Nashville, TN, United StatesHQ checked Sep 6, 2026201-500272

“Prescient Security is a global cybersecurity and compliance firm delivering risk-based audits, advanced penetration testing, and end-to-end framework support.”

Source: company website · checked Sep 6, 2026
10
Baxter Clewis CybersecurityIndirect evidence
Cedar Hill, TX, United StatesHQ checked Sep 6, 2026201-500255

“Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.”

Source: company website · checked Sep 6, 2026
11
ThoropassIndirect evidence
New York, NY, United StatesHQ checked Sep 6, 2026201-500243

“Thoropass is the only end-to-end cybersecurity auditor.”

Source: company website · checked Sep 6, 2026
12
LoginsoftIndirect evidence
Chantilly, VA, United StatesHQ checked Sep 6, 2026201-500220

“For over 20 years, leading companies in Telecom, Cybersecurity, Healthcare, Banking, New Media, and more have come to rely on Loginsoft as a trusted resource for technology talent.”

Source: company website · checked Sep 6, 2026
13Reston, VA, United StatesHQ checked Sep 6, 20261,001-5,000204

“MindPoint Group, a Quantum Sky company, is a cybersecurity specialist trusted by U.S.”

Source: company website · checked Sep 6, 2026
14
TevoraIndirect evidence
Irvine, CA, United StatesHQ checked Sep 6, 2026201-500199

“Founded in 2003, Tevora is a specialized management consultancy focused on cybersecurity, risk, and compliance services.”

Source: company website · checked Sep 6, 2026
15
DeepseasIndirect evidence
Globally Distributed, United StatesHQ checked Sep 6, 2026201-500182

“With 30 years of experience in cyber defense, DeepSeas is trusted by nearly clients around the world, including Fortune 100 enterprises and mid-market organizations, municipality…”

Source: company website · checked Sep 6, 2026
16
Ampcus CyberIndirect evidence
Chantilly, VA, United StatesHQ checked Sep 6, 20261,001-5,000170

“Trusted By 2,880+ World-Class Brands And Organizations Of All Sizes…!”

Source: company website · checked Sep 6, 2026
17
ValuementorPartial evidence
Houston, TX, United StatesHQ checked Sep 6, 202651-200167

“ValueMentor is a global information security consulting & services company that delivers real results to global business in maximizing cybersecurity.”

Source: company website · checked Sep 6, 2026
18
Hitachi CyberIndirect evidence
Santa Clara, CA, United StatesHQ checked Sep 6, 2026501-1,000159

“Hitachi Systems Trusted Cyber Management Inc.”

Source: company website · checked Sep 6, 2026
19
NuharborIndirect evidence
Colchester, VT, United StatesHQ checked Sep 6, 202651-200151

“nuHarbor is a U.S-based cybersecurity firm trusted by public sector and critical infrastructure organizations nationwide.”

Source: company website · checked Sep 6, 2026
20
AttackiqPartial evidence
Los Altos, CA, United StatesHQ checked Sep 6, 202651-200149

“AttackIQ® is trusted by top organizations worldwide to validate security controls in real time.”

Source: company website · checked Sep 6, 2026
21
AccorianIndirect evidence
East Brunswick, NJ, United StatesHQ checked Sep 6, 202651-200148

“At Accorian, we don’t just advise on compliance, we operationalize it.”

Source: company website · checked Sep 6, 2026
22
KirkpatrickpricePartial evidence
Nashville, TN, United StatesHQ checked Sep 6, 202651-200139

“KirkpatrickPrice is a licensed information security CPA firm, a PCI QSA, and a HITRUST CSF Assessor, providing assurance services to over clients worldwide.”

Source: company website · checked Sep 6, 2026
23
Ciso GlobalIndirect evidence
Scottsdale, AZ, United StatesHQ checked Sep 6, 2026201-500136

“CISO Global was designed from inception to bring talent together from cybersecurity, compliance, remediation, and secured managed services practice areas for a comprehensive…”

Source: company website · checked Sep 6, 2026
24
Varutra ConsultingPartial evidence
Mission Viejo, CA, United StatesHQ checked Sep 6, 2026201-500125

“Varutra Consulting, an InfoShare company, is a globally recognized cybersecurity firm delivering cutting-edge solutions in Cloud Security, Mobile Security, Application Security…”

Source: company website · checked Sep 6, 2026
25
EdgileIndirect evidence
Austin, TX, United StatesHQ checked Sep 6, 202651-200119

“Edgile was founded in 2001 to deliver strategic cybersecurity and risk management services to the Fortune 500.”

Source: company website · checked Sep 6, 2026

Showing 25 of 1,872 security audit firms based in the United States

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Security audit firms based in the United States at a glance

As of Sep 6, 2026
1-10Median size (employees)
New YorkLargest hub · 52 HQs
8,294Contacts with mobile numbers
Sep 6, 2026Data refreshed

Companies by employee count

1-10
1,161
11-50
538
51-200
131
201-500
23
501-1,000
4
1,001-5,000
10
5,001-10,000
3

Verified emails by last verification

0–30
9,578
31–60
733
61–90
4
90–180
9
180+
91

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 audit 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 the United States whose own description of what they do matches “security audit 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 audit firms, and records with no verified work email. Companies headquartered outside United States 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, 10,415 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.

Frequently asked

How many security audit firms are there based in the United States?

RevenueBase identified 1,872 security audit firms headquartered in the 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?

OPTIV, headquartered in Leawood, tops this list with the largest team on record.

Which city has the most security audit firms?

New York leads with 52 headquartered companies, followed by Atlanta (40) and Houston (38).

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 10,415 verified decision-maker contacts tracked across these 1,872 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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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.