Company lists · Data refreshed September 2026

Top 25 Oil and gas cybersecurity companies based in the United States

Name: Oil and gas 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 5, 2026 564 companies tracked

RevenueBase identified 564 oil and gas cybersecurity companies headquartered in the United States as of September 2026 and tracks 9,718 professional contacts across them, including 4,223 with verified work emails and 3,472 with mobile numbers. Houston is the largest hub.

This list covers oil and gas 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, how directly it supports the match, and when it was last checked. Data refreshed September 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

564Companies

9,718Contacts tracked

4,223Verified emails

3,472Mobile numbers

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The 25 largest oil and gas cybersecurity companies based in the United States

Ranked by team size

Top 25 of 564 oil and gas cybersecurity companies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names oil and gas cybersecurity companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Guidepoint SecurityPartial evidence	Reston, VA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,232
	“GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: company website · checked Sep 5, 2026
2	PASIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	1,231
	“PAS, part of Hexagon's Asset Lifecycle Intelligence division, delivers software solutions that prevent, detect, & remediate cyber threats, reduce process safety risks, and…” Source: company website · checked Sep 5, 2026
3	Trustwave, A Levelblue CompanyPartial evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	501-1,000	874
	“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: company website · checked Sep 5, 2026
4	Dragos, INCPartial evidence	Hanover, MD, United StatesHQ checked Sep 5, 2026	501-1,000	551
	“Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Source: company website · checked Sep 5, 2026
5	Nozomi NetworksIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	201-500	375
	“We protect the world’s critical infrastructure from cyber threats.” Source: company website · checked Sep 5, 2026
6	Safeaeon INCPartial evidence	Pleasanton, CA, United StatesHQ checked Sep 5, 2026	51-200	196
	“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: company website · checked Sep 5, 2026
7	DeepseasIndirect evidence	Globally Distributed, United StatesHQ checked Sep 5, 2026	201-500	182
	“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: company website · checked Sep 5, 2026
8	Cyber AdvisorsIndirect evidence	Maple Grove, MN, United StatesHQ checked Sep 5, 2026	201-500	176
	“Cyber Advisors is a nationwide leader in cyber security, providing a comprehensive range of Offensive, Defensive, and Risk Management services.” Source: company website · checked Sep 5, 2026
9	NuharborPartial evidence	Colchester, VT, United StatesHQ checked Sep 5, 2026	51-200	151
	“nuHarbor is a U.S-based cybersecurity firm trusted by public sector and critical infrastructure organizations nationwide.” Source: company website · checked Sep 5, 2026
10	OSC EdgeIndirect evidence	Atlanta, GA, United StatesHQ checked Sep 5, 2026	51-200	150
	“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: company website · checked Sep 5, 2026
11	HelpsystemsIndirect evidence	Eden Prairie, MN, United StatesHQ checked Sep 5, 2026	1,001-5,000	131
	“HelpSystems has long been known for helping organizations become more secure and autonomous.” Source: company website · checked Sep 5, 2026
12	Shift5Indirect evidence	Arlington, VA, United StatesHQ checked Sep 5, 2026	51-200	129
	“Former military officers who stood up U.S.” Source: company website · checked Sep 5, 2026
13	FoxguardIndirect evidence	Christiansburg, VA, United StatesHQ checked Sep 5, 2026	51-200	116
	“Foxguard delivers comprehensive OT Cyber Security and Compute Solutions tailored to meet the unique needs of critical infrastructures.” Source: company website · checked Sep 5, 2026
14	TracesecurityPartial evidence	Baton Rouge, LA, United StatesHQ checked Sep 5, 2026	51-200	115
	“TraceSecurity is a leading cybersecurity services company, providing a broad range of services and solutions in IT security compliance, risk and vulnerability management, and…” Source: company website · checked Sep 5, 2026
15	DirectdefenseIndirect evidence	Denver, CO, United StatesHQ checked Sep 5, 2026	51-200	111
	“DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.” Source: company website · checked Sep 5, 2026
16	Foresite CybersecurityIndirect evidence	Overland Park, KS, United StatesHQ checked Sep 5, 2026	51-200	101
	“As the world becomes more connected, our lives and businesses are more vulnerable.” Source: company website · checked Sep 5, 2026
17	Accessit GroupPartial evidence	King Of Prussia, PA, United StatesHQ checked Sep 5, 2026	51-200	91
	“25 Years Leading in Cybersecurity, and we’re just getting started.” Source: company website · checked Sep 5, 2026
18	Defy SecurityPartial evidence	Canonsburg, PA, United StatesHQ checked Sep 5, 2026	51-200	89
	“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: company website · checked Sep 5, 2026
19	Vertek CorporationPartial evidence	Burlington, VT, United StatesHQ checked Sep 5, 2026	51-200	81
	“At Vertek, we deliver advanced cybersecurity solutions that empower businesses to protect their digital assets and achieve peace of mind.” Source: company website · checked Sep 5, 2026
20	Techguard SecurityPartial evidence	O'fallon, IL, United StatesHQ checked Sep 5, 2026	51-200	80
	“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: company website · checked Sep 5, 2026
21	Apollo Information SystemsPartial evidence	Dallas, TX, United StatesHQ checked Sep 5, 2026	51-200	64
	“Apollo Information Systems delivers intelligence-led cybersecurity solutions for government agencies, educational institutions, and enterprises.” Source: company website · checked Sep 5, 2026
22	Infosight, INCIndirect evidence	Miami Lakes, FL, United StatesHQ checked Sep 5, 2026	11-50	63
	Source: company website · checked Sep 5, 2026
23	Cyber Defense TechnologiesIndirect evidence	Dulles, VA, United StatesHQ checked Sep 5, 2026	11-50	61
	“We specialize in providing comprehensive cyber security solutions by leveraging our information security background in the GovCon and military experiences to serve the federal…” Source: company website · checked Sep 5, 2026
24	Def-Logix, INCIndirect evidence	San Antonio, TX, United StatesHQ checked Sep 5, 2026	51-200	58
	Source: company website · checked Sep 5, 2026
25	Cyberforce QPartial evidence	Plymouth, MI, United StatesHQ checked Sep 5, 2026	11-50	56
	“CyberForce\|Q has provided proven cybersecurity program advancements for over 30 years.” Source: company website · checked Sep 5, 2026

Showing 25 of 564 oil and gas cybersecurity companies based in the United States

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Oil and gas cybersecurity companies based in the United States at a glance

As of Sep 5, 2026

11-50Median size (employees)

HoustonLargest hub · 23 HQs

3,472Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

276

11-50

200

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Verified emails by last verification

0–30

3,917

31–60

270

61–90

90–180

180+

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 oil and gas cybersecurity companies, 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 “oil and gas cybersecurity companies”. 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 oil and gas 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 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, 4,223 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 5, 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

How many oil and gas cybersecurity companies are there based in the United States?

RevenueBase identified 564 oil and gas 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?

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

Which city has the most oil and gas cybersecurity companies?

Houston leads with 23 headquartered companies, followed by New York (15) and Dallas (13).

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 4,223 verified decision-maker contacts tracked across these 564 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 5, 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 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.