Company lists · Data refreshed September 2026
Top 25 Grid cybersecurity firms based in the United States
RevenueBase identified 160 grid cybersecurity firms headquartered in the United States as of September 2026 and tracks 2,092 professional contacts across them, including 984 with verified work emails. Houston is the largest hub.
This list covers grid cybersecurity firms 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 28, 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.
The 25 largest grid cybersecurity firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 375 contacts → | ||||
Indirect evidence “We protect the world’s critical infrastructure from cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 106 contacts → | ||||
Partial evidence “ShorePoint recognizes that cybersecurity is the challenge of our generation.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 65 contacts → | ||||
Indirect evidence “With more than twenty years of in-field work securing and assuring some of the Department of Defense and the Intelligence Community’s most critical networks, JFL Consulting…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 64 contacts → | ||||
Partial evidence “Apollo Information Systems delivers intelligence-led cybersecurity solutions for government agencies, educational institutions, and enterprises.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 63 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 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 60 contacts → | ||||
Partial evidence “Atom Power is an innovative company providing transformative grid technology that delivers unparalleled protection, visibility, and control at the point of consumption.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 42 contacts → | ||||
Partial evidence “NLE is a Utah-based next generation cybersecurity firm providing integrated solutions and managed security services with local support and engineering.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 38 contacts → | ||||
Partial evidence “Are You Ready to Protect Your Business with the Best Cybersecurity Solutions?” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 33 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 31 contacts → | ||||
Indirect evidence “SecuLore was acquired by Motorola Solutions in 2026.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 29 contacts → | ||||
Partial evidence “At Cyber Realm Solutions, we provide the expertise needed to support every stage of cybersecurity initiatives across nuclear, utility, and critical infrastructure environments.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 28 contacts → | ||||
Indirect evidence “Cavalry Solutions, LLC is a pure-play, security consulting services firm that serves critical infrastructure and specializes in complex systems.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 27 contacts → | ||||
Indirect evidence “Empowering Trust, Securing the Future At the core of our mission is a simple yet powerful principle: empowering our customers and partners with the freedom to choose solutions…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 25 contacts → | ||||
Indirect evidence “At SkyHelm, our mission is to protect America’s critical infrastructure technology.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 24 contacts → | ||||
Indirect evidence “InfraShield is a U.S-based cyber-physical security company specializing in the protection of critical infrastructure systems across OT and IT environments.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 24 contacts → | ||||
Indirect evidence “At Varmoda Tech, we are on a mission to revolutionize industries and drive meaningful change through cutting-edge technology solutions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 24 contacts → | ||||
Indirect evidence “Your infrastructure IS your network.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 22 contacts → | ||||
Indirect evidence “As an IT company founded inside an energy cooperative, we understand the critical role that energy cooperatives and utility partners play in their communities.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 22 contacts → | ||||
Partial evidence “OTM Cyber provides cybersecurity solutions to businesses and government agencies with a specialty in 911 and public safety.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 20 contacts → | ||||
Partial evidence “At LeveL5Cyber, we believe cybersecurity is about more than protecting data and technology- it's about building lasting partnerships that empower your business and enable your…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 19 contacts → | ||||
Indirect evidence “BlastWave BlastWave prevents industrial cyberattacks.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 16 contacts → | ||||
Indirect evidence “WizNucleus provides cyber & physical security solutions for mission-critical facilities, including nuclear and electric.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 14 contacts → | ||||
Partial evidence “Cybirical was created with one purpose: to help electric utility customers, owners, and operators address the cyber challenges of the modernized grid.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
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: grid cybersecurity firms. 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 grid cybersecurity firms.
- Partial evidence
- Its own public description names part of grid cybersecurity firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name grid cybersecurity firms. 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 160 grid cybersecurity firms based in the United States
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Grid cybersecurity firms based in the United States at a glance
As of Sep 28, 2026Companies by employee count
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 160 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 grid cybersecurity firms, 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 “grid cybersecurity firms”. 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 grid cybersecurity firms), 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 grid cybersecurity firms, 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, 984 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 28, 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 grid cybersecurity firms, 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 grid cybersecurity firms are there based in the United States?
RevenueBase identified 160 grid cybersecurity firms 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?
Nozomi Networks, headquartered in San Francisco, tops this list with the largest team on record.
Which city has the most grid cybersecurity firms?
Houston leads with 7 headquartered companies, followed by New York (5) and Austin (4).
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 984 verified decision-maker contacts tracked across these 160 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 28, 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.
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