Company lists · Data refreshed September 2026
Top 25 Ot security software companies worldwide
RevenueBase identified 276 ot security software companies worldwide as of September 2026 and tracks 6,197 professional contacts across them, including 2,043 with verified work emails. The United States is the largest market and London the largest hub.
This list covers ot security software companies worldwide, 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 29, 2026. Country and city lists for ot security software companies follow the table.
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 ot security software companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,231 contacts → | ||||
Partial evidence “PAS, part of Hexagon's Asset Lifecycle Intelligence division, delivers software solutions that prevent, detect, & remediate cyber threats, reduce process safety risks, and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 725 contacts → | ||||
Indirect evidence “Claroty has redefined cyber-physical systems (CPS) protection with an unrivaled industry-centric platform built to secure mission-critical infrastructure.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 551 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 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 304 contacts → | ||||
Partial evidence “Infopercept is a global cybersecurity company dedicated to transforming how organizations perceive and implement security.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 259 contacts → | ||||
Strong evidence “TXOne Networks is the operations-first OT security partner.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 129 contacts → | ||||
Indirect evidence “Former military officers who stood up U.S.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 126 contacts → | ||||
Partial evidence “Through our software-enabled hardware platforms, we enable secure and reliable operations, protecting against both today’s cybersecurity challenges and those yet to come.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 116 contacts → | ||||
Strong evidence “Foxguard delivers comprehensive OT Cyber Security and Compute Solutions tailored to meet the unique needs of critical infrastructures.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 86 contacts → | ||||
Partial evidence “Dispel delivers security that makes industrial operations run faster.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 69 contacts → | ||||
Indirect evidence “Verve Industrial Protection has ensured reliable and secure industrial control systems for 30 years.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 67 contacts → | ||||
Indirect evidence “Holtec A/S specializes in the development and manufacturing of advanced industrial electrical solutions tailored for the Industrial and Environmental sectors.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 64 contacts → | ||||
Indirect evidence “ISG Nordic AB helps business and organizations to protect assets and people; monitor traffic and material flows; and enable remote operation of industry processes.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 53 contacts → | ||||
Strong evidence “Phosphorus, a Dragos company, is the leading xIoT security and management platform that proactively manages the expanding IoT, OT, and IoMT attack surface.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 52 contacts → | ||||
Partial evidence “Apeiron delivers end-to-end automation, engineering, Operational Technology (OT), and OT cybersecurity solutions that enable global OEMs and enterprises to innovate, operate…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 51 contacts → | ||||
Indirect evidence “Industrial Defender protects the world’s critical infrastructure from cyberattacks.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 44 contacts → | ||||
Strong evidence “OTORIO is a provider of OT Cyber Security solutions delivering a Cyber Risk Management Platform designed to support every stage of the maturity journey, from unmatched visibility…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 44 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 43 contacts → | ||||
Partial evidence “Omny protects industrial companies against cybersecurity threats by providing both holistic visibility into Operational Technology (OT) environments.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 42 contacts → | ||||
Strong evidence “We believe there should be no compromise on ICS or OT security.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 37 contacts → | ||||
Indirect evidence “Corsha securely connects the operational systems that run our world.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 36 contacts → | ||||
Strong evidence “The future of IoT/OT security is here.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 33 contacts → | ||||
Partial evidence “SIGA provides a Process-Oriented OT Cybersecurity with real-time decision- making capabilities for managing critical Incident Response (IR) phases of an OT cyberattack – including…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 30 contacts → | ||||
Strong evidence “As specialists in security solutions within OT, IT and risk management, we help you prevent intrusions, secure systems, and safeguard critical societal functions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 29 contacts → | ||||
Indirect evidence “Gyala is a 100% Italian Cybersecurity Vendor.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 28 contacts → | ||||
Indirect evidence “ICsec offers cybersecurity solutions dedicated to industrial networks.” Source: RevenueBase Database · checked Sep 29, 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: ot security software 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 ot security software companies.
- Partial evidence
- Its own public description names part of ot security software companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name ot security software 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 276 ot security software companies worldwide
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Ot security software companies worldwide at a glance
As of Sep 29, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 ot security software 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.
- Coverage
- Every country. Country and city lists for ot security software companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “ot security software 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 ot security software 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 ot security software companies, and records with no verified work email.
- 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, 2,043 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 29, 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.
Ot security software companies by location
1 lists · largest firstEvery Ot security software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 ot security software 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 ot security software companies are there worldwide?
RevenueBase identified 276 ot security software companies worldwide 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?
PAS, headquartered in Houston, tops this list with the largest team on record.
Which country has the most ot security software companies?
The United States leads with 67 companies. Every ot security software companies list by country and city is linked on this page.
Which city has the most ot security software companies?
London leads with 12 headquartered companies, followed by Houston (7) and New York (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 2,043 verified decision-maker contacts tracked across these 276 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 29, 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.