Company lists · Data refreshed September 2026

Top 25 Cybersecurity energy sector companies based in the United States

Name: Cybersecurity energy sector 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 1, 2026 717 companies tracked

RevenueBase identified 717 cybersecurity energy sector companies headquartered in the United States as of September 2026 and tracks 9,849 professional contacts across them, including 4,202 with verified work emails and 3,823 with mobile numbers. Houston is the largest hub.

This list covers cybersecurity energy sector 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 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

717Companies

9,849Contacts tracked

4,202Verified emails

3,823Mobile numbers

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The 25 largest cybersecurity energy sector companies based in the United States

Ranked by team size

Top 25 of 717 cybersecurity energy sector companies 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 energy sector 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	Guidepoint Security	Partial evidence	Tampa, FL, United States	1,001-5,000	1,234 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 1, 2026
2	Dragos, INC	Partial evidence	Houston, TX, United States	501-1,000	544 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 1, 2026
3	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
4	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
5	Amsys Innovative Solutions	Indirect evidence	Houston, TX, United States	201-500	311 contacts →
	Indirect evidence “AMSYS is a nationwide IT Services Provider headquartered in Houston, TX.” Source: RevenueBase Database · checked Sep 1, 2026
6	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
7	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
8	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
9	Nuharbor Security	Partial evidence	Boston, MA, United States	51-200	149 contacts →
	Partial evidence “NuHarbor Security is a leading national cybersecurity services firm, supporting the diverse needs of hundreds of clients with clear, comprehensive, and outcome-based solutions.” Source: RevenueBase Database · checked Sep 1, 2026
10	SOLIS	Indirect evidence	Austin, TX, United States	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 1, 2026
11	Ciso Global	Partial evidence	Scottsdale, AZ, United States	201-500	134 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 1, 2026
12	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
13	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
14	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
15	Everline	Indirect evidence	Houston, TX, United States	201-500	101 contacts →
	Indirect evidence “EverLine provides fully-integrated compliance, SCADA/IT, control room and security services to more than 200 customers nationwide through a unique Technical Stack.” Source: RevenueBase Database · checked Sep 1, 2026
16	Accessit Group	Partial evidence	King Of Prussia, PA, United States	51-200	92 contacts →
	Partial evidence “25 Years Leading in Cybersecurity, and we’re just getting started.” Source: RevenueBase Database · checked Sep 1, 2026
17	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
18	Cyberclan	Indirect evidence	Las Vegas, NV, United States	51-200	78 contacts →
	Indirect evidence “Since 2006, CyberClan has been delivering the peace of mind our clients need to operate with confidence online.” Source: RevenueBase Database · checked Sep 1, 2026
19	Vertek Corporation	Partial evidence	Burlington, VT, United States	51-200	76 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 1, 2026
20	Delviom, LLC	Partial evidence	Ashburn, VA, United States	51-200	64 contacts →
	Partial evidence “Delviom is a distinguished provider of cutting-edge cybersecurity and business intelligence (BI) solutions, dedicated to helping organizations strengthen their security posture…” Source: RevenueBase Database · checked Sep 1, 2026
21	Apollo Information Systems	Partial evidence	Dallas, TX, United States	51-200	63 contacts →
	Partial evidence “Apollo Information Systems delivers intelligence-led cybersecurity solutions for government agencies, educational institutions, and enterprises.” Source: RevenueBase Database · checked Sep 1, 2026
22	Blackhawk Technology Group	Indirect evidence	Larose, LA, United States	51-200	57 contacts →
	Indirect evidence “Are your critical infrastructure assets fully protected against evolving security threats?” Source: RevenueBase Database · checked Sep 1, 2026
23	Def-Logix, INC	Indirect evidence	San Antonio, TX, United States	51-200	56 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 1, 2026
24	Secure Traces	Indirect evidence	Alpharetta, GA, United States	51-200	53 contacts →
	Indirect evidence “Secure Traces is a unique cyber security services provider with an impeccable track record of delivering outstanding services, we are driven by passion and backed by our extensive…” Source: RevenueBase Database · checked Sep 1, 2026
25	Guard 1 Services	Partial evidence	Houston, TX, United States	51-200	53 contacts →
	Partial evidence “Guard 1 Services provides integrated security solutions for the energy industry.” 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 energy sector 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 cybersecurity energy sector companies.
Partial evidence: Its own public description names part of cybersecurity energy sector companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity energy sector 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 717 cybersecurity energy sector companies based in the United States

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Cybersecurity energy sector companies based in the United States at a glance

As of Sep 1, 2026

42.7%Verified-email coverage

38.8%Mobile-number coverage

13.7Average contacts per company

1-10Median size (employees)

3.6%Largest-city concentration · Houston

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

365

11-50

244

51-200

201-500

501-1,000

1,001-5,000

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 energy sector 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 “cybersecurity energy sector 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 cybersecurity energy sector 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 cybersecurity energy sector 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, 4,202 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.

Cybersecurity energy sector companies by metro

Cybersecurity energy sector companies in Houston26

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 energy sector 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 cybersecurity energy sector companies are there based in the United States?

RevenueBase identified 717 cybersecurity energy sector 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?

Guidepoint Security, headquartered in Tampa, tops this list with the largest team on record.

Which city has the most cybersecurity energy sector companies?

Houston leads with 26 headquartered companies, followed by Dallas (18) and New York (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 4,202 verified decision-maker contacts tracked across these 717 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.