Company lists · Data refreshed September 2026

Top 25 Operational technology security companies based in Germany

Name: Operational technology security companies based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 77 companies tracked

RevenueBase identified 77 operational technology security companies headquartered in Germany as of September 2026 and tracks 1,855 professional contacts across them, including 661 with verified work emails and 46 with mobile numbers. Berlin is the largest hub.

This list covers operational technology security companies headquartered in Germany, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

77Companies

1,855Contacts tracked

661Verified emails

46Mobile numbers

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The 25 largest operational technology security companies based in Germany

Ranked by team size

Top 25 of 77 operational technology security companies based in Germany, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names operational technology security companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Secunet Security Networks AGIndirect evidence	Essen, GermanyHQ checked Sep 5, 2026	1,001-5,000	623
	“secunet – We are the Guardians of Europe's Digital Freedom.” Source: company website · checked Sep 5, 2026
2	T Security - DachIndirect evidence	Bonn, GermanyHQ checked Sep 5, 2026	1,001-5,000	363
	“Wir glauben an eine sichere digitale Zukunft mit minimalen Risiken und maximalen Chancen.” Source: company website · checked Sep 5, 2026
3	AMDTPartial evidence	Landau In Der Pfalz, GermanyHQ checked Sep 5, 2026	201-500	178
	“AMDT is the global leader in versioning, backup, and OT security solutions for industrial automation, delivering nearly 40 years of innovation and reliability.” Source: company website · checked Sep 5, 2026
4	R-Tec IT Security GmbhPartial evidence	Wuppertal, GermanyHQ checked Sep 5, 2026	51-200	79
	“r-tec IT Security ist seit über 25 Jahren auf IT-Sicherheit spezialisiert.” Source: company website · checked Sep 5, 2026
5	Triovega GmbhPartial evidence	Lübeck, GermanyHQ checked Sep 5, 2026	51-200	45
	“We are a leading provider for production security and efficiency.” Source: company website · checked Sep 5, 2026
6	EntiretecPartial evidence	Dresden, GermanyHQ checked Sep 5, 2026	51-200	40
	“ENTIRETEC delivers Global Managed Services that keep business critical networks and security running 24/7 worldwide.” Source: company website · checked Sep 5, 2026
7	Admeritia GmbhPartial evidence	Langenfeld, GermanyHQ checked Sep 5, 2026	11-50	37
	“As an owner-managed company, admeritia GmbH turned to industrial IT security shortly after its foundation in 2004.” Source: company website · checked Sep 5, 2026
8	Communication Systems GmbhIndirect evidence	Neu-Isenburg, GermanyHQ checked Sep 5, 2026	51-200	34
	“Wir sind die Com-Sys!” Source: company website · checked Sep 5, 2026
9	Ausecus GmbhPartial evidence	Augsburg, GermanyHQ checked Sep 5, 2026	11-50	31
	“ausecus GmbH delivers IT-Security Consulting and Managed Services for critical infrastructure organisations (KRITIS).” Source: company website · checked Sep 5, 2026
10	Rhebo OT & Iiot SecurityStrong evidence	Leipzig, GermanyHQ checked Sep 5, 2026	11-50	27
	“Rhebo provides simple and effective cybersecurity solutions for Operational Technology and distributed industrial assets for the energy sector, critical infrastructure and…” Source: company website · checked Sep 5, 2026
11	Allgeier Cyris GmbhIndirect evidence	Bremen, GermanyHQ checked Sep 5, 2026	51-200	26
	“Mehr Schutz vor Angriffen aus dem Cyberraum: Cyberkriminalität ist eine der größten Bedrohungen unserer Zeit.” Source: company website · checked Sep 5, 2026
12	Kentix GmbhStrong evidence	Idar-oberstein, GermanyHQ checked Sep 5, 2026	51-200	23
	“Security technology goes SIMPLE and DIGITAL Every company has a need for physical security.” Source: company website · checked Sep 5, 2026
13	Consistec Engineering & Consulting GmbhIndirect evidence	Saarbruecken, GermanyHQ checked Sep 5, 2026	51-200	23
	“Die im Mai gegründete consistec Engineering & Consulting GmbH ist ein inhabergeführtes mittelständisches Unternehmen mit Sitz in Saarbrücken, Saarland.” Source: company website · checked Sep 5, 2026
14	Enbw Cyber Security GmbhIndirect evidence	Karlsruhe, GermanyHQ checked Sep 5, 2026	11-50	22
	“Digitale Bedrohungen wachsen – und damit unsere Verantwortung.” Source: company website · checked Sep 5, 2026
15	IncydePartial evidence	Berlin, GermanyHQ checked Sep 5, 2026	11-50	20
	“We turn your INdustrial CYber DEfense on, respecting your special operating systems and requirements for efficient and effective security measures, including Railways, Automotive…” Source: company website · checked Sep 5, 2026
16	I2solutions GmbhIndirect evidence	Stolberg, GermanyHQ checked Sep 5, 2026	51-200	20
	“We translate challenges of digitization into secure IT/OT solutions The digital transformation of industry is leading to an increasingly complex networking of machines, systems…” Source: company website · checked Sep 5, 2026
17	GAI Netconsult GmbhPartial evidence	Berlin, GermanyHQ checked Sep 5, 2026	11-50	17
	“Die GAI NetConsult GmbH ist ein in Deutschland und dem benachbarten Ausland tätiges, unabhängiges Beratungsunternehmen für IT- und OT-Security mit Hauptsitz in Berlin.” Source: company website · checked Sep 5, 2026
18	OndesoIndirect evidence	Regensburg, GermanyHQ checked Sep 5, 2026	11-50	16
	“ondeso provides reliable OT management software for industrial PCs, specifically developed for use in industrial infrastructures.” Source: company website · checked Sep 5, 2026
19	Caplog-X GmbhIndirect evidence	Leipzig, GermanyHQ checked Sep 5, 2026	51-200	16
	“Die caplog-x GmbH mit Sitz in Leipzig und Essen ist der zuverlässige Partner für Konzeption, Aufbau und Betrieb sicherer IT-Lösungen und OT-Umgebungen im Bereich der Kritischen…” Source: company website · checked Sep 5, 2026
20	BXC SecurityPartial evidence	Hallbergmoos, GermanyHQ checked Sep 5, 2026	11-50	16
	“BxC Security focuses on delivering end-to-end cyber security consulting across IT and Production environments.” Source: company website · checked Sep 5, 2026
21	Sequire TechnologyPartial evidence	Saarbrücken, GermanyHQ checked Sep 5, 2026	1-10	11
	“Sicherheit können wir Wir sind sequire (für: security (engl: Sicherheit) und quire (lateinisch: können))!” Source: company website · checked Sep 5, 2026
22	Trust2protect GmbhIndirect evidence	Hilchenbach, GermanyHQ checked Sep 5, 2026	11-50	10
	“Ihr Vertrauen – Unser Schutz!” Source: company website · checked Sep 5, 2026
23	Nerosoft It-Security GmbhIndirect evidence	Hamburg, GermanyHQ checked Sep 5, 2026	1-10	10
	“IT-Sicherheit im Mittelstand?” Source: company website · checked Sep 5, 2026
24	SI Sichere Industrie GmbhPartial evidence	Hamburg, GermanyHQ checked Sep 5, 2026	11-50	10
	“Im Kern sind wir ein smart-empathisches Ingenieurbüro für anspruchsvolle Security-Projekte in der OT.” Source: company website · checked Sep 5, 2026
25	Yekta IT GmbhIndirect evidence	Dortmund, GermanyHQ checked Sep 5, 2026	11-50	10
	“Yekta IT GmbH ist eine herstellerunabhängige IT- und OT-Sicherheitsberatung mit über 15 Jahren Erfahrung in der Cybersecurity.” Source: company website · checked Sep 5, 2026

Showing 25 of 77 operational technology security companies based in Germany

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Operational technology security companies based in Germany at a glance

As of Sep 5, 2026

11-50Median size (employees)

BerlinLargest hub · 7 HQs

46Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Verified emails by last verification

0–30

633

31–60

61–90

90–180

180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among operational technology security 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 Germany whose own description of what they do matches “operational technology security 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 operational technology security companies, and records with no verified work email. Companies headquartered outside Germany 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, 661 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

How many operational technology security companies are there based in Germany?

RevenueBase identified 77 operational technology security companies headquartered in Germany 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?

Secunet Security Networks AG, headquartered in Essen, tops this list with the largest team on record.

Which city has the most operational technology security companies?

Berlin leads with 7 headquartered companies, followed by Hamburg (4) and Bonn (3).

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 661 verified decision-maker contacts tracked across these 77 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.