Company lists · Data refreshed September 2026
Top 25 Information security consultants based in the United States
RevenueBase identified 6,815 information security consultants headquartered in the United States as of September 2026 and tracks 75,571 professional contacts across them, including 29,137 with verified work emails and 28,567 with mobile numbers. New York is the largest hub.
This list covers information security consultants 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 3, 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 information security consultants based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,206 | ||||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,252 | ||||
“Thales is a global leader in cybersecurity, helping the most trusted organizations in the world protect their most critical applications, data, and identities anywhere at scale.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,234 | ||||
“GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,107 | ||||
“Committed to delivering tailored solutions and unmatched experiences, Centric Consulting is an international business and technology consulting firm that combines the benefits of…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 981 | ||||
“PPC is now part of DSA” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 960 | ||||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | SDG CorporationIndirect evidence | 661 | |||
“With more than 30 years of experience partnering with global enterprises on complex business and IT initiatives, SDG is a trusted provider of advisory, transformation, and managed…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 636 | ||||
“Telos empowers and protects the world’s most security-conscious organizations with solutions for continuous security assurance of individuals, systems, and information.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 618 | ||||
“VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 566 | ||||
“For more than 25 years, SolomonEdwards has empowered organizations to tackle common and complex business challenges through strategic advisory, technical advocacy, and hands-on…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 553 | ||||
“Ampcus is a global business, technology consulting and an staff augmentation firm specializing in AI/ML,digital solutions, Cybersecurity & Risk management, Testing, Forensics &…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 517 | ||||
“UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 445 | ||||
“At Xcelerate, safeguarding the nation isn’t just a mission-it’s our obsession.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 438 | ||||
“Palo Alto Networks Unit 42 brings together world-renowned threat researchers with an elite team of incident responders and security consultants to create an intelligence-driven…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 409 | ||||
“United Security Inc.(USI) provides personalized security solutions enhanced by advanced technology and cyber services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 407 | ||||
“Edgewater Federal Solutions was founded in 2002 with the mission of being the best IT consulting company possible for our government clients, our contracting partners and our…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 406 | ||||
“IBM Promontory is a global leader in strategy, risk management, and compliance consulting.#IBMConsulting” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 390 | ||||
“With offices in the US and India, Atlas Systems is a trusted partner helping companies on their digital transformation journeys – expanding their capabilities and delivering added…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 346 | ||||
“About ISSQUARED, Inc: An emerging value provider across an array of digital transformation solutions to address on-demand security and governance needs.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | Vantage Point SolutionsIndirect evidence | 344 | |||
“Vantage Point is a premier engineering and consulting firm serving the broadband, energy, enterprise, and banking industries.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 338 | ||||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 324 | ||||
“For the security practitioner caught between rapidly evolving threats and demanding executives, IANS Research is a clear-headed resource for decision-making and articulating risk.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | CTIIndirect evidence | 321 | |||
“Continental Technologies Inc (CTI) configures, distributes, designs and maintains technology solutions for customers around the globe and remains both privately-held and locally…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 313 | ||||
“Intelligent Technical Solutions is your trusted business partner for all your Cybersecurity, Managed and Co-managed IT support, Risk & Compliance, Data Analytics, and Consulting…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | 313 | ||||
“K2 Integrity is a global risk management firm dedicated to helping organizations across both the public and private sectors protect their assets, reputation, and operations and…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 6,815 information security consultants based in the United States
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Information security consultants based in the United States at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 information security consultants, 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 “information security consultants”. 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 information security consultants, 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, 29,137 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 3, 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.
Information security consultants by metro
- Information security consultants in New York223
- Information security consultants in Washington147
- Information security consultants in Houston139
- Information security consultants in Atlanta128
- Information security consultants in Chicago106
- Information security consultants in Miami106
- Information security consultants in Dallas102
- Information security consultants in Austin99
- Information security consultants in Tampa85
- Information security consultants in San Francisco80
- Information security consultants in Los Angeles79
- Information security consultants in San Diego65
- Information security consultants in Charlotte63
- Information security consultants in Arlington61
- Information security consultants in Boston61
- Information security consultants in Denver58
- Information security consultants in Phoenix52
- Information security consultants in Seattle51
- Information security consultants in San Antonio50
- Information security consultants in Alexandria48
- Information security consultants in Orlando47
- Information security consultants in Reston43
- Information security consultants in Las Vegas41
- Information security consultants in Raleigh39
- Information security consultants in Portland38
- Information security consultants in Columbia37
- Information security consultants in Ashburn34
- Information security consultants in Mclean34
- Information security consultants in Fairfax33
- Information security consultants in Minneapolis33
- Information security consultants in Baltimore32
- Information security consultants in Columbus30
- Information security consultants in Scottsdale30
- Information security consultants in Herndon29
- Information security consultants in Nashville29
- Information security consultants in Richmond29
- Information security consultants in Huntsville28
- Information security consultants in Wilmington28
- Information security consultants in Philadelphia27
- Information security consultants in Plano27
- Information security consultants in Indianapolis26
- Information security consultants in Pittsburgh26
- Information security consultants in Sheridan26
Frequently asked
How many information security consultants are there based in the United States?
RevenueBase identified 6,815 information security consultants 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 Chantilly, tops this list with the largest team on record.
Which city has the most information security consultants?
New York leads with 223 headquartered companies, followed by Washington (147) and Houston (139).
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 29,137 verified decision-maker contacts tracked across these 6,815 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 3, 2026.
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Information security consultants by geography
- Information security consultants based in the United Kingdom
- Information security consultants based in Brazil
- Information security consultants based in France
- Information security consultants based in Germany
- Information security consultants based in Australia
- Information security consultants based in Canada
- Information security consultants based in the Netherlands
- Information security consultants based in Italy
- Information security consultants based in Spain
- Information security consultants based in Mexico
- Information security consultants based in South Africa
- Information security consultants based in Switzerland
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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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