Company lists · Data refreshed September 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 Sep 1, 2026 1,035 companies tracked

RevenueBase identified 1,035 cybersecurity for city infrastructure headquartered in the United States as of September 2026 and tracks 14,713 professional contacts across them, including 5,892 with verified work emails and 5,426 with mobile numbers. Houston is the largest hub.

This list covers cybersecurity for city infrastructure 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

1,035Companies

14,713Contacts tracked

5,892Verified emails

5,426Mobile numbers

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

Ranked by team size

Top 25 of 1,035 cybersecurity for city infrastructure based in the United States, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity for city infrastructure: 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	Dragos, INC	Strong evidence	Houston, TX, United States	501-1,000	544 contacts →
	Strong evidence “Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Source: RevenueBase Database · checked Sep 1, 2026
2	Vc3	Partial evidence	Memphis, TN, United States	501-1,000	517 contacts →
	Partial evidence “VC3 is a managed IT and cybersecurity services provider serving organizations throughout the US and Canada.” Source: RevenueBase Database · checked Sep 1, 2026
3	Ultraviolet Cyber	Indirect evidence	Phoenix, AZ, United States	501-1,000	517 contacts →
	Indirect evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program.” Source: RevenueBase Database · checked Sep 1, 2026
4	Securityhq	Partial evidence	New York, NY, United States	501-1,000	492 contacts →
	Partial evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 1, 2026
5	Mnemonic	Partial evidence	Redwood City, CA, United States	201-500	345 contacts →
	Partial evidence “With offices in Oslo, Stavanger, Trondheim, Stockholm, Copenhagen, Utrecht and London, we deliver cybersecurity services across Europe.” Source: RevenueBase Database · checked Sep 1, 2026
6	Logically	Indirect evidence	Danbury, CT, United States	201-500	307 contacts →
	Indirect evidence “Welcome to Logically.” Source: RevenueBase Database · checked Sep 1, 2026
7	Cipher A Prosegur Company	Partial evidence	Miami, FL, United States	201-500	294 contacts →
	Partial evidence “We are Cipher, a company from the Prosegur group specializing in Cybersecurity.” Source: RevenueBase Database · checked Sep 1, 2026
8	Lumifi	Indirect evidence	Scottsdale, AZ, United States	51-200	247 contacts →
	Indirect evidence “Lumifi Cyber helps organizations illuminate their cyber defense with continuous protection across the full security lifecycle.” Source: RevenueBase Database · checked Sep 1, 2026
9	Epsilon Inc., An American Systems Company	Indirect evidence	Greenville, SC, United States	201-500	225 contacts →
	Indirect evidence “Epsilon, an AMERICAN SYSTEMS company, began with a simple yet powerful mission: to make IT empower people-not frustrate them.” Source: RevenueBase Database · checked Sep 1, 2026
10	Vehere	Partial evidence	San Francisco, CA, United States	201-500	210 contacts →
	Partial evidence “Vehere is an AI cybersecurity company operating at the intersection of national security and enterprise security.” Source: RevenueBase Database · checked Sep 1, 2026
11	Netdata Cybersecurity	Partial evidence	Miami, FL, United States	201-500	209 contacts →
	Partial evidence “Netdata is a leading global cybersecurity services partner with more than 200 certified engineers and over 1,500 certifications, widely recognized as a partner of Palo Alto…” Source: RevenueBase Database · checked Sep 1, 2026
12	Deepseas	Indirect evidence	United States	201-500	185 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 1, 2026
13	Cyber Advisors	Indirect evidence	Maple Grove, MN, United States	201-500	180 contacts →
	Indirect evidence “Cyber Advisors is a nationwide leader in cyber security, providing a comprehensive range of Offensive, Defensive, and Risk Management services.” Source: RevenueBase Database · checked Sep 1, 2026
14	Hitachi Cyber	Indirect evidence	Santa Clara, CA, United States	501-1,000	161 contacts →
	Indirect evidence “Hitachi Systems Trusted Cyber Management Inc.” Source: RevenueBase Database · checked Sep 1, 2026
15	At&t Cybersecurity	Partial evidence	Dallas, TX, United States	1,001-5,000	158 contacts →
	Partial evidence “AT & T Cybersecurity’s Edge-to-Edge technologies provide phenomenal threat intelligence, collaborative defense, security without the seams, and solutions that fit your business.” Source: RevenueBase Database · checked Sep 1, 2026
16	Valiant Solutions	Partial evidence	Mclean, VA, United States	201-500	156 contacts →
	Partial evidence “Valiant Solutions, LLC stands out as a premier provider of Cybersecurity and IT services aiding the Federal Government in staying ahead of complex information security challenges.” Source: RevenueBase Database · checked Sep 1, 2026
17	Helpsystems	Indirect evidence	Eden Prairie, MN, United States	1,001-5,000	132 contacts →
	Indirect evidence “HelpSystems has long been known for helping organizations become more secure and autonomous.” Source: RevenueBase Database · checked Sep 1, 2026
18	Adapt Forward	Partial evidence	North Charleston, SC, United States	51-200	130 contacts →
	Partial evidence “Adapt Forward helps government agencies outpace adversaries through proven Cybersecurity Service Provider (CSSP) operations, mission-focused innovation, and a people first culture…” Source: RevenueBase Database · checked Sep 1, 2026
19	Sealing Technologies, A Parsons Company	Partial evidence	Columbia, MD, United States	51-200	119 contacts →
	Partial evidence “SealingTech, a Parsons Company, rapidly delivers innovative, agile cybersecurity solutions that modernize, protect, and defend the networks and systems of the federal government…” Source: RevenueBase Database · checked Sep 1, 2026
20	Directdefense	Indirect evidence	Denver, CO, United States	51-200	112 contacts →
	Indirect evidence “DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.” Source: RevenueBase Database · checked Sep 1, 2026
21	WATI	Indirect evidence	Sacramento, CA, United States	201-500	106 contacts →
	Indirect evidence “West Advanced Technologies, Inc.(WATI) is a California-headquartered technology solutions provider, delivering 100% success for clients from government agencies, tech companies…” Source: RevenueBase Database · checked Sep 1, 2026
22	Trustedsec	Indirect evidence	Fairlawn, OH, United States	51-200	100 contacts →
	Indirect evidence “TrustedSec is an end-to-end security consulting company that provides customized services to build client-defined success.” Source: RevenueBase Database · checked Sep 1, 2026
23	Golden West Technologies	Indirect evidence	Rapid City, SD, United States	51-200	93 contacts →
	Indirect evidence “At Golden West Technologies, we go beyond providing technology solutions.” Source: RevenueBase Database · checked Sep 1, 2026
24	Skyepoint Decisions, INC	Strong evidence	Dulles, VA, United States	51-200	91 contacts →
	Strong evidence “SkyePoint Decisions is a leading Cybersecurity Architecture and Engineering, Critical Infrastructure and Operations, and Applications Development and Maintenance IT service…” Source: RevenueBase Database · checked Sep 1, 2026
25	Techguard Security	Partial evidence	Ofallon, IL, United States	51-200	81 contacts →
	Partial evidence “Our Cybersecurity Specialists are highly educated and certified professionals who have utilized their extensive IT security experience to support both Fortune 500 businesses and…” Source: RevenueBase Database · checked Sep 1, 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: cybersecurity for city infrastructure. 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 cybersecurity for city infrastructure.
Partial evidence: Its own public description names part of cybersecurity for city infrastructure, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity for city infrastructure. 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 1,035 cybersecurity for city infrastructure based in the United States

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

As of Sep 1, 2026

40.0%Verified-email coverage

36.9%Mobile-number coverage

14.2Average contacts per company

11-50Median size (employees)

2.3%Largest-city concentration · Houston

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

504

11-50

360

51-200

119

201-500

501-1,000

1,001-5,000

5,001-10,000

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 cybersecurity for city infrastructure, 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 the United States whose own description of what they do matches “cybersecurity for city infrastructure”. 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 cybersecurity for city infrastructure), 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 cybersecurity for city infrastructure, 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 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, 5,892 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 1, 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

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

RevenueBase identified 1,035 cybersecurity for city infrastructure 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?

Dragos, INC, headquartered in Houston, tops this list with the largest team on record.

Which city has the most cybersecurity for city infrastructure?

Houston leads with 24 headquartered companies, followed by New York (21) and Dallas (20).

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 5,892 verified decision-maker contacts tracked across these 1,035 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 1, 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.