Company lists · Data refreshed September 2026

Top 25 Utilities cybersecurity companies based in the United States

Name: Utilities cybersecurity companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 746 companies tracked

RevenueBase identified 746 utilities cybersecurity companies headquartered in the United States as of September 2026 and tracks 10,533 professional contacts across them, including 4,561 with verified work emails. Houston is the largest hub.

This list covers utilities cybersecurity companies 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 21, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

746Companies

10,533Contacts tracked

4,561Verified emails

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The 25 largest utilities cybersecurity companies based in the United States

Ranked by team size

Top 25 of 746 utilities cybersecurity companies based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to utilities cybersecurity companies: 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	Trustwave, A Levelblue Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	501-1,000	874 contacts →
	Partial evidence “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: RevenueBase Database · checked Sep 21, 2026
2	Dragos, INC	Partial evidence	Hanover, MD, United StatesHQ checked Sep 21, 2026	501-1,000	551 contacts →
	Partial 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 21, 2026
3	Ultraviolet Cyber	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	501-1,000	523 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026
4	Nozomi Networks	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	201-500	375 contacts →
	Indirect evidence “We protect the world’s critical infrastructure from cyber threats.” Source: RevenueBase Database · checked Sep 21, 2026
5	Lumifi	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 21, 2026	51-200	249 contacts →
	Indirect evidence “Lumifi Cyber helps organizations illuminate their cyber defense with continuous protection across the full security lifecycle.” Source: RevenueBase Database · checked Sep 21, 2026
6	Fortress Information Security	Partial evidence	Orlando, FL, United StatesHQ checked Sep 21, 2026	201-500	231 contacts →
	Partial evidence “Fortress is the AI-powered cybersecurity company defending critical infrastructure, government agencies, and their supply chains against cyber threats and mission risks.” Source: RevenueBase Database · checked Sep 21, 2026
7	Vehere	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	201-500	211 contacts →
	Indirect evidence “Vehere is an AI cyber defense company operating at the intersection of national security and enterprise security.” Source: RevenueBase Database · checked Sep 21, 2026
8	Safeaeon INC	Partial evidence	Pleasanton, CA, United StatesHQ checked Sep 21, 2026	51-200	196 contacts →
	Partial evidence “SafeAeon leads the industry as a top-tier Cybersecurity-as-a-Service provider, delivering 24x7 premium Managed Security Services with AI-powered and human-driven 24x7 SOC…” Source: RevenueBase Database · checked Sep 21, 2026
9	Deepseas	Indirect evidence	Globally Distributed, United StatesHQ checked Sep 21, 2026	201-500	182 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 21, 2026
10	At&t Cybersecurity	Partial evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	156 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 21, 2026
11	Valiant Solutions	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	201-500	152 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 21, 2026
12	Nuharbor	Partial evidence	Colchester, VT, United StatesHQ checked Sep 21, 2026	51-200	151 contacts →
	Partial evidence “nuHarbor is a U.S-based cybersecurity firm trusted by public sector and critical infrastructure organizations nationwide.” Source: RevenueBase Database · checked Sep 21, 2026
13	OSC Edge	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	51-200	150 contacts →
	Indirect evidence “From CND in the Cloud to CSfC with Enterprise Remote Capabilities, OSC Edge empowers organizations with solutions that prepare them for today and tomorrow.” Source: RevenueBase Database · checked Sep 21, 2026
14	SOLIS	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	51-200	137 contacts →
	Indirect evidence “Solis is a leading provider of managed cyber security services and cyber incident response.” Source: RevenueBase Database · checked Sep 21, 2026
15	Ciso Global	Partial evidence	Scottsdale, AZ, United StatesHQ checked Sep 21, 2026	201-500	136 contacts →
	Partial evidence “CISO Global was designed from inception to bring talent together from cybersecurity, compliance, remediation, and secured managed services practice areas for a comprehensive…” Source: RevenueBase Database · checked Sep 21, 2026
16	Helpsystems	Indirect evidence	Eden Prairie, MN, United StatesHQ checked Sep 21, 2026	1,001-5,000	131 contacts →
	Indirect evidence “HelpSystems has long been known for helping organizations become more secure and autonomous.” Source: RevenueBase Database · checked Sep 21, 2026
17	Sealing Technologies, A Parsons Company	Partial evidence	Columbia, MD, United StatesHQ checked Sep 21, 2026	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 21, 2026
18	Adapt Forward	Partial evidence	North Charleston, SC, United StatesHQ checked Sep 21, 2026	51-200	113 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 21, 2026
19	Directdefense	Indirect evidence	Denver, CO, United StatesHQ checked Sep 21, 2026	51-200	111 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 21, 2026
20	Shorepoint INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	n/a	106 contacts →
	Partial evidence “ShorePoint recognizes that cybersecurity is the challenge of our generation.” Source: RevenueBase Database · checked Sep 21, 2026
21	Foresite Cybersecurity	Indirect evidence	Overland Park, KS, United StatesHQ checked Sep 21, 2026	51-200	101 contacts →
	Indirect evidence “As the world becomes more connected, our lives and businesses are more vulnerable.” Source: RevenueBase Database · checked Sep 21, 2026
22	1force	Indirect evidence	Hilton Head Island, SC, United StatesHQ checked Sep 21, 2026	11-50	99 contacts →
	Indirect evidence “For more than 15 years, 1FORCE has been a steadfast supporter of dynamic and demanding programs within the federal sector, with a specific focus on National Security.” Source: RevenueBase Database · checked Sep 21, 2026
23	Accessit Group	Partial evidence	King Of Prussia, PA, United StatesHQ checked Sep 21, 2026	51-200	91 contacts →
	Partial evidence “25 Years Leading in Cybersecurity, and we’re just getting started.” Source: RevenueBase Database · checked Sep 21, 2026
24	Defy Security	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 21, 2026	51-200	89 contacts →
	Partial evidence “Defy Security was founded in 2017 with one primary goal: to change the cybersecurity buying experience by delivering value and service that is unmatched.” Source: RevenueBase Database · checked Sep 21, 2026
25	Vertek Corporation	Partial evidence	Burlington, VT, United StatesHQ checked Sep 21, 2026	51-200	81 contacts →
	Partial evidence “At Vertek, we deliver advanced cybersecurity solutions that empower businesses to protect their digital assets and achieve peace of mind.” Source: RevenueBase Database · checked Sep 21, 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: utilities cybersecurity companies. 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 utilities cybersecurity companies.
Partial evidence: Its own public description names part of utilities cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name utilities cybersecurity companies. 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 746 utilities cybersecurity companies based in the United States

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Utilities cybersecurity companies based in the United States at a glance

As of Sep 21, 2026

43.3%Verified-email coverage

14.1Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

384

11-50

252

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 746 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 utilities cybersecurity companies, 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 “utilities cybersecurity companies”. 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 utilities cybersecurity companies), 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 utilities cybersecurity companies, 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, 4,561 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 21, 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 utilities cybersecurity companies, 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 utilities cybersecurity companies are there based in the United States?

RevenueBase identified 746 utilities cybersecurity companies 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?

Trustwave, A Levelblue Company, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most utilities cybersecurity companies?

Houston leads with 18 headquartered companies, followed by New York (17) and Washington (15).

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 4,561 verified decision-maker contacts tracked across these 746 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 21, 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.