Company lists · Data refreshed November 2026

Top 25 Cybersecurity for city infrastructure based in the United States

Name: Cybersecurity for city infrastructure based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 2,743 companies tracked

RevenueBase identified 2,743 company matches for cybersecurity for city infrastructure associated with the United States as of November 2026 and tracks 45,230 professional contacts across them, including 17,552 with verified work emails. New York is the largest hub.

This list covers company matches for cybersecurity for city infrastructure associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 5, 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 RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built

2,743Companies

45,230Contacts tracked

17,552Verified emails

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

The 25 largest cybersecurity for city infrastructure based in the United States

Ranked by team size

Top 25 of 2,743 company matches for cybersecurity for city infrastructure based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,171 contacts →
	Exact match “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Nov 5, 2026	10001+	1,928 contacts →
	Exact match “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,346 contacts →
	Exact match “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	Trustwave, A Levelblue Company	Exact match	Chicago, IL, United StatesHQ recorded Nov 5, 2026	501-1,000	733 contacts →
	Exact match “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	Telos Corporation	Exact match	Ashburn, VA, United StatesHQ recorded Nov 5, 2026	501-1,000	676 contacts →
	Exact match “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	Dragos, INC	Exact match	Hanover, MD, United StatesHQ recorded Nov 5, 2026	501-1,000	670 contacts →
	Exact match “Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Ultraviolet Cyber	Exact match	Mclean, AZ, United StatesHQ recorded Nov 5, 2026	501-1,000	623 contacts →
	Exact match “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Palo Alto Networks Unit 42	Exact match	Santa Clara, CA, United StatesHQ recorded Nov 5, 2026	5,001-10,000	510 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Vc3	Exact match	Columbia, SC, United StatesHQ recorded Nov 5, 2026	501-1,000	501 contacts →
	Exact match “VC3 is a managed IT and cybersecurity services provider serving organizations throughout the US and Canada.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	IBN Technologies	Exact match	Miami, FL, United StatesHQ recorded Nov 5, 2026	51-200	417 contacts →
	Exact match “Welcome to IBN Technologies, LLC, Your Trusted Partner in Cybersecurity, Cloud, and Finance Solutions With 26+ years of expertise, IBN Technologies leads in delivering integrated…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	Computer Solutions	Exact match	San Antonio, TX, United StatesHQ recorded Nov 5, 2026	51-200	408 contacts →
	Exact match “Computer Solutions: Trusted Managed IT Services and Cybersecurity Partner in San Antonio, Texas For more than 46 years, Computer Solutions has helped businesses, schools…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Kudelski Security	Exact match	Cheseaux, TX, United StatesHQ recorded Nov 5, 2026	201-500	392 contacts →
	Exact match “Kudelski Security is a premier cybersecurity solutions provider, working with the most security-conscious organizations in Europe and across the United States.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Novacoast	Exact match	Wichita, AZ, United StatesHQ recorded Nov 5, 2026	201-500	384 contacts →
	Exact match “Novacoast is an international cybersecurity company specializing in IT services and software development.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Intelligent Technical Solutions	Exact match	Las Vegas, NV, United StatesHQ recorded Nov 5, 2026	201-500	372 contacts →
	Exact match “Intelligent Technical Solutions (ITS) is a Managed Security Service Provider (MSSP) helping growing and mid-market organizations improve IT performance, strengthen cybersecurity…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Security Risk Advisors	Exact match	Philadelphia, PA, United StatesHQ recorded Nov 5, 2026	201-500	342 contacts →
	Exact match “We deliver cybersecurity consulting, 24x7 operations and SaaS to leading companies in the Financial Services, Healthcare, Pharmaceuticals, Technology and Retail industries.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Logically	Exact match	Dublin, OH, United StatesHQ recorded Nov 5, 2026	201-500	324 contacts →
	Exact match “Welcome to Logically.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Cipher A Prosegur Company	Exact match	Miami, FL, United StatesHQ recorded Nov 5, 2026	201-500	263 contacts →
	Exact match “We are Cipher, a company from the Prosegur group specializing in Cybersecurity.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	Magna5	Exact match	Canonsburg, GA, United StatesHQ recorded Nov 5, 2026	201-500	250 contacts →
	Exact match “Magna5 is a national managed IT and cybersecurity services provider supporting organizations that require always‑on availability, strong security, and regulatory compliance.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Lumifi	Exact match	Scottsdale, AZ, United StatesHQ recorded Nov 5, 2026	51-200	243 contacts →
	Exact match “Lumifi Cyber helps organizations illuminate their cyber defense with continuous protection across the full security lifecycle.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Baxter Clewis Cybersecurity	Exact match	Cedar Hill, TX, United StatesHQ recorded Nov 5, 2026	201-500	243 contacts →
	Exact match “Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Sawdey Solution Services	Exact match	Beavercreek, OH, United StatesHQ recorded Nov 5, 2026	201-500	225 contacts →
	Exact match “For over 20 years, Sawdey Solutions Services has provided both Government and commercial clients with innovative cross-disciplined professional services that aim not only to…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Loginsoft	Exact match	Chantilly, VA, United StatesHQ recorded Nov 5, 2026	201-500	222 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Sayers	Exact match	Vernon Hills, MA, United StatesHQ recorded Nov 5, 2026	51-200	215 contacts →
	Exact match “At Sayers, we offer expert guidance to help organizations tackle cyber, cloud, and IT infrastructure challenges.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Convergence Networks	Exact match	Us & Canada, OR, United StatesHQ recorded Nov 5, 2026	201-500	214 contacts →
	Exact match “Convergence Networks provides managed IT services, cybersecurity, cloud solutions, IT consulting, Modern work solutions, and compliance support to organizations across Canada and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	Cyber Advisors	Exact match	Maple Grove, ND, United StatesHQ recorded Nov 5, 2026	201-500	212 contacts →
	Exact match “Cyber Advisors is a nationwide leader in cyber security, providing a comprehensive range of Offensive, Defensive, and Risk Management services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “cybersecurity for city infrastructure”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 2,743 cybersecurity for city infrastructure based in the United States

See the full list, filter by size, metro and specialty, and access 17,552 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Cybersecurity for city infrastructure based in the United States at a glance

As of Nov 5, 2026

38.8%Verified-email coverage

16.5Average contacts per company

1-10Median size (employees)

3.0%Largest-city concentration · New York

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

1,460

11-50

890

51-200

287

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 2,743 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United States whose business descriptions match “cybersecurity for city infrastructure” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 17,552 professional contacts with verified work emails across the full matched dataset. 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 November 5, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Cybersecurity for city infrastructure by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “cybersecurity for city infrastructure”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity for city infrastructure are there based in the United States?

RevenueBase identified 2,743 company matches for cybersecurity for city infrastructure associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

OPTIV tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most cybersecurity for city infrastructure?

New York leads with 83 company records, followed by Atlanta (50) and Houston (49).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 17,552 professional contacts with verified work emails tracked across these 2,743 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 2,743 cybersecurity for city infrastructure based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Cybersecurity for city infrastructure 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 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.