Company lists · Data refreshed November 2026
Top 24 Operational technology (ot) cyber security services based in the United States
RevenueBase identified 486 company matches for operational technology (ot) cyber security services associated with the United States as of November 2026 and tracks 11,907 professional contacts across them, including 4,941 with verified work emails. Houston is the largest hub.
This list covers company matches for operational technology (ot) cyber security services associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 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.
The 24 largest operational technology (ot) cyber security services based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,346 contacts → | ||||
Exact match “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 2 | 1,333 contacts → | ||||
Exact match “PAS, part of Hexagon's Asset Lifecycle Intelligence division, delivers software solutions that prevent, detect, & remediate cyber threats, reduce process safety risks, and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 3 | 733 contacts → | ||||
Exact match “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 4 | 670 contacts → | ||||
Exact match “Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 5 | 243 contacts → | ||||
Exact match “Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 6 | 243 contacts → | ||||
Exact match “Hillstone Networks’ Integrative Cyber Security approach delivers coverage, control, and consolidation to secure digital transformation for more than enterprises worldwide.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 7 | 212 contacts → | ||||
Exact match “Cyber Advisors is a nationwide leader in cyber security, providing a comprehensive range of Offensive, Defensive, and Risk Management services.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 8 | 190 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 9 | 174 contacts → | ||||
Exact match “We believe resilience depends on minimizing and managing the increasing risks facing the critical infrastructure and industrial systems that support our country, companies, and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 10 | 151 contacts → | ||||
Exact match “nuHarbor is a U.S-based cybersecurity firm trusted by public sector and critical infrastructure organizations nationwide.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 11 | 148 contacts → | ||||
Exact match “From CND in the Cloud to CSfC with Enterprise Remote Capabilities, OSC Edge empowers organizations with solutions that prepare them for today and tomorrow.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 12 | 143 contacts → | ||||
Exact match “At Synersys Technologies, we help small and mid-sized enterprises build secure, scalable, and high-performance technology environments.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 13 | 141 contacts → | ||||
Exact match “Former military officers who stood up U.S.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 14 | 120 contacts → | ||||
Exact match “INS provides industry-leading products, technical support and OT services for wired and wireless machine networking applications.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 15 | 115 contacts → | ||||
Exact match “Foxguard delivers comprehensive OT Cyber Security and Compute Solutions tailored to meet the unique needs of critical infrastructures.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 16 | 102 contacts → | ||||
Exact match “DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 17 | 101 contacts → | ||||
Exact match “August Schell is dedicated to delivering agile and innovative cybersecurity solutions to proactively defend and protect organization’s data against cyber attacks.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 18 | 96 contacts → | ||||
Exact match “Dispel delivers security that makes industrial operations run faster.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 19 | 91 contacts → | ||||
Exact match “Integrated IT delivers a seamless blend of IT operations and cybersecurity, designed to simplify complexity, strengthen security, and improve operational resilience.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 20 | 90 contacts → | ||||
Exact match “Defy Security was founded in 2017 with one primary goal: to change the cybersecurity buying experience by delivering value and service that is unmatched.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 21 | 83 contacts → | ||||
Exact match “Our Cybersecurity Specialists are highly educated and certified professionals who have utilized their extensive IT security experience to support both Fortune 500 businesses and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 22 | 67 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 23 | 63 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
| 24 | 63 contacts → | ||||
Exact match “RevelSI is a global cybersecurity, AI, software, and infrastructure services organization.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “operational technology (ot) cyber security services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 24 of 486 operational technology (ot) cyber security services based in the United States
See the full list, filter by size, metro and specialty, and access 4,941 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Operational technology (ot) cyber security services based in the United States at a glance
As of Nov 5, 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 486 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- 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
- Company records associated with the United States whose business descriptions match “operational technology (ot) cyber security services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 4,941 professional contacts with verified work emails across the full matched dataset. 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 November 5, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “operational technology (ot) cyber security services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many operational technology (ot) cyber security services are there based in the United States?
RevenueBase identified 486 company matches for operational technology (ot) cyber security services associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Guidepoint Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most operational technology (ot) cyber security services?
Houston leads with 24 company records, followed by New York (19) and Austin (10).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,941 professional contacts with verified work emails tracked across these 486 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 486 operational technology (ot) cyber security services based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Operational technology (ot) cyber security services by geography
- Operational technology (ot) cyber security services based in Sao Paulo, Brazil
- Operational technology (ot) cyber security services based in Paris, France
- Operational technology (ot) cyber security services based in Bangalore, India
- Operational technology (ot) cyber security services based in Dubai, United Arab Emirates
- Operational technology (ot) cyber security services based in London, United Kingdom
- Operational technology (ot) cyber security services based in Houston, United States
- Operational technology (ot) cyber security services based in Australia
- Operational technology (ot) cyber security services based in Belgium
- Operational technology (ot) cyber security services based in Brazil
- Operational technology (ot) cyber security services based in Canada
- Operational technology (ot) cyber security services based in Chile
- Operational technology (ot) cyber security services based in France
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Operational technology (ot) cyber security services based in Sao Paulo, Brazil
- Operational technology (ot) cyber security services based in Paris, France
- Operational technology (ot) cyber security services based in Bangalore, India
- Operational technology (ot) cyber security services based in Dubai, United Arab Emirates
- Operational technology (ot) cyber security services based in London, United Kingdom
- Operational technology (ot) cyber security services based in Houston, United States
Company intelligence · public preview
Top 24 operational technology (ot) cyber security services based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 486 matching company records for operational technology (ot) cyber security services based in the United States, with 11,907 tracked contacts and 4,941 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 24 operational technology (ot) cyber security services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Guidepoint Securityguidepointsecurity.comHQ: Reston, VA, United StatesReported employees: 1,001-5,000 | Reston, VA, United States | 1,001-5,000 | Exact match | 1,346 contacts → |
“GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  PASpas.comHQ: Houston, TX, United StatesReported employees: 201-500 | Houston, TX, United States | 201-500 | Exact match | 1,333 contacts → |
“PAS, part of Hexagon's Asset Lifecycle Intelligence division, delivers software solutions that prevent, detect, & remediate cyber threats, reduce process safety risks, and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Trustwave, A Levelblue Companylevelblue.comHQ: Chicago, IL, United StatesReported employees: 501-1,000 | Chicago, IL, United States | 501-1,000 | Exact match | 733 contacts → |
“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Dragos, INCdragos.comHQ: Hanover, MD, United StatesReported employees: 501-1,000 | Hanover, MD, United States | 501-1,000 | Exact match | 670 contacts → |
“Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Baxter Clewis Cybersecuritybaxterclewis.comHQ: Cedar Hill, TX, United StatesReported employees: 201-500 | Cedar Hill, TX, United States | 201-500 | Exact match | 243 contacts → |
“Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Hillstone Networkshillstonenet.comHQ: Santa Clara, CA, United StatesReported employees: 1,001-5,000 | Santa Clara, CA, United States | 1,001-5,000 | Exact match | 243 contacts → |
“Hillstone Networks’ Integrative Cyber Security approach delivers coverage, control, and consolidation to secure digital transformation for more than enterprises worldwide.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Cyber Advisorscyberadvisors.comHQ: Maple Grove, ND, United StatesReported employees: 201-500 | Maple Grove, ND, United States | 201-500 | Exact match | 212 contacts → |
“Cyber Advisors is a nationwide leader in cyber security, providing a comprehensive range of Offensive, Defensive, and Risk Management services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Deepseasdeepseas.comHQ: Globally Distributed, United StatesReported employees: 201-500 | Globally Distributed, United States | 201-500 | Exact match | 190 contacts → |
“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…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  RMC Globalrmcglobal.comHQ: Arlington, VA, United StatesReported employees: 51-200 | Arlington, VA, United States | 51-200 | Exact match | 174 contacts → |
“We believe resilience depends on minimizing and managing the increasing risks facing the critical infrastructure and industrial systems that support our country, companies, and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Nuharbornuharbor.comHQ: Colchester, DC, United StatesReported employees: 51-200 | Colchester, DC, United States | 51-200 | Exact match | 151 contacts → |
“nuHarbor is a U.S-based cybersecurity firm trusted by public sector and critical infrastructure organizations nationwide.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  OSC Edgeoscedge.comHQ: Atlanta, DC, United StatesReported employees: 51-200 | Atlanta, DC, United States | 51-200 | Exact match | 148 contacts → |
“From CND in the Cloud to CSfC with Enterprise Remote Capabilities, OSC Edge empowers organizations with solutions that prepare them for today and tomorrow.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Synersys Technologies INCsynersystech.comHQ: Cedar Park, TX, United StatesReported employees: 201-500 | Cedar Park, TX, United States | 201-500 | Exact match | 143 contacts → |
“At Synersys Technologies, we help small and mid-sized enterprises build secure, scalable, and high-performance technology environments.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Shift5shift5.ioHQ: Arlington, VA, United StatesReported employees: 51-200 | Arlington, VA, United States | 51-200 | Exact match | 141 contacts → |
“Former military officers who stood up U.S.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Industrial Networking Solutions INSindustrialnetworking.comHQ: Richardson, TX, United StatesReported employees: 51-200 | Richardson, TX, United States | 51-200 | Exact match | 120 contacts → |
“INS provides industry-leading products, technical support and OT services for wired and wireless machine networking applications.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Foxguardfoxguardsolutions.comHQ: Christiansburg, VA, United StatesReported employees: 51-200 | Christiansburg, VA, United States | 51-200 | Exact match | 115 contacts → |
“Foxguard delivers comprehensive OT Cyber Security and Compute Solutions tailored to meet the unique needs of critical infrastructures.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Directdefensedirectdefense.comHQ: Denver, CO, United StatesReported employees: 51-200 | Denver, CO, United States | 51-200 | Exact match | 102 contacts → |
“DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  August Schellaugustschell.comHQ: Rockville, MD, United StatesReported employees: 51-200 | Rockville, MD, United States | 51-200 | Exact match | 101 contacts → |
“August Schell is dedicated to delivering agile and innovative cybersecurity solutions to proactively defend and protect organization’s data against cyber attacks.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Dispeldispel.comHQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 96 contacts → |
“Dispel delivers security that makes industrial operations run faster.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Integrated ITintegratedit.comHQ: Milford, RI, United StatesReported employees: 51-200 | Milford, RI, United States | 51-200 | Exact match | 91 contacts → |
“Integrated IT delivers a seamless blend of IT operations and cybersecurity, designed to simplify complexity, strengthen security, and improve operational resilience.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Defy Securitydefysecurity.comHQ: Canonsburg, PA, United StatesReported employees: 51-200 | Canonsburg, PA, United States | 51-200 | Exact match | 90 contacts → |
“Defy Security was founded in 2017 with one primary goal: to change the cybersecurity buying experience by delivering value and service that is unmatched.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Techguard Securitytechguard.comHQ: O'fallon, IL, United StatesReported employees: 51-200 | O'fallon, IL, United States | 51-200 | Exact match | 83 contacts → |
“Our Cybersecurity Specialists are highly educated and certified professionals who have utilized their extensive IT security experience to support both Fortune 500 businesses and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Infosight, INCinfosightinc.comHQ: Miami Lakes, IL, United StatesReported employees: 11-50 | Miami Lakes, IL, United States | 11-50 | Exact match | 67 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 |  JFL Consulting, LLCjflconsulting.comHQ: Springfield, VA, United StatesReported employees: 51-200 | Springfield, VA, United States | 51-200 | Exact match | 63 contacts → |
“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…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Revelsirevelsi.comHQ: New York, United StatesReported employees: 51-200 | New York, United States | 51-200 | Exact match | 63 contacts → |
“RevelSI is a global cybersecurity, AI, software, and infrastructure services organization.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 24 of 486 company matches
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Operational technology (ot) cyber security services: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
485 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 486 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for operational technology (ot) cyber security services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many operational technology (ot) cyber security services did RevenueBase find based in the United States?
The saved snapshot records 486 matching company records, 11,907 tracked contacts and 4,941 verified emails. The public preview displays 24 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Operational technology (ot) cyber security services by geography
- Operational technology (ot) cyber security services based in Sao Paulo, Brazil
- Operational technology (ot) cyber security services based in Paris, France
- Operational technology (ot) cyber security services based in Bangalore, India
- Operational technology (ot) cyber security services based in Dubai, United Arab Emirates
- Operational technology (ot) cyber security services based in London, United Kingdom
- Operational technology (ot) cyber security services based in Houston, United States
- Operational technology (ot) cyber security services based in Australia
- Operational technology (ot) cyber security services based in Belgium
- Operational technology (ot) cyber security services based in Brazil
- Operational technology (ot) cyber security services based in Canada
- Operational technology (ot) cyber security services based in Chile
- Operational technology (ot) cyber security services based in France
Cite this list
RevenueBase Data Team. Top 24 operational technology (ot) cyber security services based in the United States. Snapshot: November 5, 2026. https://revenuebase.ai/companies/operational-technology-ot-cyber-security-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
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- New lists
- Operational technology (ot) cyber security services based in Sao Paulo, Brazil
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- Operational technology (ot) cyber security services based in Bangalore, India
- Operational technology (ot) cyber security services based in Dubai, United Arab Emirates
- Operational technology (ot) cyber security services based in London, United Kingdom
- Operational technology (ot) cyber security services based in Houston, United States
Company intelligence · public preview
Top 24 operational technology (ot) cyber security services based in the United States
RevenueBase records 486 matching company records for operational technology (ot) cyber security services based in the United States, with 11,907 tracked contacts and 4,941 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 5, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 24 operational technology (ot) cyber security services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Guidepoint Securityguidepointsecurity.com HQ: Reston, VA, United StatesReported employees: 1,001-5,000 | Reston, VA, United States | 1,001-5,000 | Exact match | 1,346 contacts → |
“GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | PASpas.com HQ: Houston, TX, United StatesReported employees: 201-500 | Houston, TX, United States | 201-500 | Exact match | 1,333 contacts → |
“PAS, part of Hexagon's Asset Lifecycle Intelligence division, delivers software solutions that prevent, detect, & remediate cyber threats, reduce process safety risks, and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Trustwave, A Levelblue Companylevelblue.com HQ: Chicago, IL, United StatesReported employees: 501-1,000 | Chicago, IL, United States | 501-1,000 | Exact match | 733 contacts → |
“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Dragos, INCdragos.com HQ: Hanover, MD, United StatesReported employees: 501-1,000 | Hanover, MD, United States | 501-1,000 | Exact match | 670 contacts → |
“Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Baxter Clewis Cybersecuritybaxterclewis.com HQ: Cedar Hill, TX, United StatesReported employees: 201-500 | Cedar Hill, TX, United States | 201-500 | Exact match | 243 contacts → |
“Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Hillstone Networkshillstonenet.com HQ: Santa Clara, CA, United StatesReported employees: 1,001-5,000 | Santa Clara, CA, United States | 1,001-5,000 | Exact match | 243 contacts → |
“Hillstone Networks’ Integrative Cyber Security approach delivers coverage, control, and consolidation to secure digital transformation for more than enterprises worldwide.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Cyber Advisorscyberadvisors.com HQ: Maple Grove, ND, United StatesReported employees: 201-500 | Maple Grove, ND, United States | 201-500 | Exact match | 212 contacts → |
“Cyber Advisors is a nationwide leader in cyber security, providing a comprehensive range of Offensive, Defensive, and Risk Management services.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Deepseasdeepseas.com HQ: Globally Distributed, United StatesReported employees: 201-500 | Globally Distributed, United States | 201-500 | Exact match | 190 contacts → |
“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…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | RMC Globalrmcglobal.com HQ: Arlington, VA, United StatesReported employees: 51-200 | Arlington, VA, United States | 51-200 | Exact match | 174 contacts → |
“We believe resilience depends on minimizing and managing the increasing risks facing the critical infrastructure and industrial systems that support our country, companies, and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Nuharbornuharbor.com HQ: Colchester, DC, United StatesReported employees: 51-200 | Colchester, DC, United States | 51-200 | Exact match | 151 contacts → |
“nuHarbor is a U.S-based cybersecurity firm trusted by public sector and critical infrastructure organizations nationwide.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | OSC Edgeoscedge.com HQ: Atlanta, DC, United StatesReported employees: 51-200 | Atlanta, DC, United States | 51-200 | Exact match | 148 contacts → |
“From CND in the Cloud to CSfC with Enterprise Remote Capabilities, OSC Edge empowers organizations with solutions that prepare them for today and tomorrow.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Synersys Technologies INCsynersystech.com HQ: Cedar Park, TX, United StatesReported employees: 201-500 | Cedar Park, TX, United States | 201-500 | Exact match | 143 contacts → |
“At Synersys Technologies, we help small and mid-sized enterprises build secure, scalable, and high-performance technology environments.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Shift5shift5.io HQ: Arlington, VA, United StatesReported employees: 51-200 | Arlington, VA, United States | 51-200 | Exact match | 141 contacts → |
“Former military officers who stood up U.S.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Industrial Networking Solutions INSindustrialnetworking.com HQ: Richardson, TX, United StatesReported employees: 51-200 | Richardson, TX, United States | 51-200 | Exact match | 120 contacts → |
“INS provides industry-leading products, technical support and OT services for wired and wireless machine networking applications.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Foxguardfoxguardsolutions.com HQ: Christiansburg, VA, United StatesReported employees: 51-200 | Christiansburg, VA, United States | 51-200 | Exact match | 115 contacts → |
“Foxguard delivers comprehensive OT Cyber Security and Compute Solutions tailored to meet the unique needs of critical infrastructures.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Directdefensedirectdefense.com HQ: Denver, CO, United StatesReported employees: 51-200 | Denver, CO, United States | 51-200 | Exact match | 102 contacts → |
“DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | August Schellaugustschell.com HQ: Rockville, MD, United StatesReported employees: 51-200 | Rockville, MD, United States | 51-200 | Exact match | 101 contacts → |
“August Schell is dedicated to delivering agile and innovative cybersecurity solutions to proactively defend and protect organization’s data against cyber attacks.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Dispeldispel.com HQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 96 contacts → |
“Dispel delivers security that makes industrial operations run faster.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Integrated ITintegratedit.com HQ: Milford, RI, United StatesReported employees: 51-200 | Milford, RI, United States | 51-200 | Exact match | 91 contacts → |
“Integrated IT delivers a seamless blend of IT operations and cybersecurity, designed to simplify complexity, strengthen security, and improve operational resilience.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Defy Securitydefysecurity.com HQ: Canonsburg, PA, United StatesReported employees: 51-200 | Canonsburg, PA, United States | 51-200 | Exact match | 90 contacts → |
“Defy Security was founded in 2017 with one primary goal: to change the cybersecurity buying experience by delivering value and service that is unmatched.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Techguard Securitytechguard.com HQ: O'fallon, IL, United StatesReported employees: 51-200 | O'fallon, IL, United States | 51-200 | Exact match | 83 contacts → |
“Our Cybersecurity Specialists are highly educated and certified professionals who have utilized their extensive IT security experience to support both Fortune 500 businesses and…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Infosight, INCinfosightinc.com HQ: Miami Lakes, IL, United StatesReported employees: 11-50 | Miami Lakes, IL, United States | 11-50 | Exact match | 67 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | JFL Consulting, LLCjflconsulting.com HQ: Springfield, VA, United StatesReported employees: 51-200 | Springfield, VA, United States | 51-200 | Exact match | 63 contacts → |
“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…” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Revelsirevelsi.com HQ: New York, United StatesReported employees: 51-200 | New York, United States | 51-200 | Exact match | 63 contacts → |
“RevelSI is a global cybersecurity, AI, software, and infrastructure services organization.” Recorded description excerpt · November 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 24 of 486 company matches
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Operational technology (ot) cyber security services: dataset insights
November 5, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
485 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 486 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 5, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for operational technology (ot) cyber security services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many operational technology (ot) cyber security services did RevenueBase find based in the United States?
The saved snapshot records 486 matching company records, 11,907 tracked contacts and 4,941 verified emails. The public preview displays 24 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 5, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 24 operational technology (ot) cyber security services based in the United States. Snapshot: November 5, 2026. https://revenuebase.ai/companies/operational-technology-ot-cyber-security-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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