Company lists · Data refreshed September 2026
Top 25 Grid cybersecurity companies based in the United States
RevenueBase identified 254 grid cybersecurity companies headquartered in the United States as of September 2026 and tracks 5,142 professional contacts across them, including 1,803 with verified work emails and 1,804 with mobile numbers. Houston is the largest hub.
This list covers grid 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 3, 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.
The 25 largest grid cybersecurity companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 544 | ||||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 274 | ||||
“In the ever-growing world of Cloud Computing, Big Data and the Internet of Things, NIKSUN® is the industry leader in making the unknown known.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 231 | ||||
“Hillstone Networks’ Integrative Cyber Security approach delivers coverage, control, and consolidation to secure digital transformation for more than enterprises worldwide.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 210 | ||||
“Vehere is an AI cybersecurity company operating at the intersection of national security and enterprise security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 185 | ||||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | At&t CybersecurityPartial evidence | 158 | |||
“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: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 136 | ||||
“Gridware is a technology company focused on protecting and enhancing the electrical grid.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 132 | ||||
“HelpSystems has long been known for helping organizations become more secure and autonomous.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 127 | ||||
“Tripwire is proud to be part of Fortra’s comprehensive cybersecurity portfolio.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 115 | ||||
“Foxguard delivers comprehensive OT Cyber Security and Compute Solutions tailored to meet the unique needs of critical infrastructures.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 103 | ||||
“We empower organizations with resilient, self-healing capabilities that prevent and neutralize even the most advanced cyber threats.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 76 | ||||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 74 | ||||
“REDLattice™ is a U.S-owned global defense tech company delivering preeminent digital access for its customers within the global intelligence community, law enforcement, and…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 64 | ||||
“Delviom is a distinguished provider of cutting-edge cybersecurity and business intelligence (BI) solutions, dedicated to helping organizations strengthen their security posture…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 63 | ||||
“Apollo Information Systems delivers intelligence-led cybersecurity solutions for government agencies, educational institutions, and enterprises.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | LanciumIndirect evidence | 60 | |||
“Lancium is an energy technology and infrastructure company uniquely positioned to catalyze and enable the AI data center demand mega-trend, with the integration and orchestration…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 60 | ||||
“Atom Power is an innovative company providing transformative grid technology that delivers unparalleled protection, visibility, and control at the point of consumption.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 57 | ||||
“Are your critical infrastructure assets fully protected against evolving security threats?” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 46 | ||||
“Your Vision Achieved.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 38 | ||||
“ManTech Cyber Solutions International (MCSI) delivers advanced cybersecurity and information security products to the federal and commercial marketplace.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 38 | ||||
“Are You Ready to Protect Your Business with the Best Cybersecurity Solutions?” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | 31 | ||||
“RunSafe Security protects embedded software across critical infrastructure, delivering automated vulnerability identification and software hardening from build-time to runtime to…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 28 | ||||
“Cavalry Solutions, LLC is a pure-play, security consulting services firm that serves critical infrastructure and specializes in complex systems.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | 27 | ||||
“DruvStar provides data and cyber defense solutions, offering enterprise-grade managed solutions operated from our Vegas-based SOC DruvStar solutions include: 1.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 254 grid cybersecurity companies based in the United States
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Grid cybersecurity companies based in the United States at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 grid 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 “grid 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 grid 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, 1,803 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 3, 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 grid cybersecurity companies are there based in the United States?
RevenueBase identified 254 grid 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?
Dragos, INC, headquartered in Houston, tops this list with the largest team on record.
Which city has the most grid cybersecurity companies?
Houston leads with 13 headquartered companies, followed by Miami (6) and Dallas (6).
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 1,803 verified decision-maker contacts tracked across these 254 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 3, 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.
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