Company lists · Data refreshed September 2026

Top 25 Cybersecurity defense contractors based in Germany

Name: Cybersecurity defense contractors based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 374 companies tracked

RevenueBase identified 374 cybersecurity defense contractors headquartered in Germany as of September 2026 and tracks 5,809 professional contacts across them, including 1,774 with verified work emails and 152 with mobile numbers. Berlin is the largest hub.

This list covers cybersecurity defense contractors 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 1, 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.

How to read this list RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

374Companies

5,809Contacts tracked

1,774Verified emails

152Mobile numbers

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The 25 largest cybersecurity defense contractors based in Germany

Ranked by team size

Top 25 of 374 cybersecurity defense contractors based in Germany, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity defense contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	MTI	Indirect evidence	Munchen, Germany	201-500	762 contacts →
	Indirect evidence “MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.” Source: RevenueBase Database · checked Sep 1, 2026
2	Secunet Security Networks AG	Partial evidence	Essen, Germany	1,001-5,000	620 contacts →
	Partial evidence “secunet – Protecting Digital Infrastructures secunet is Germany’s leading cybersecurity company.” Source: RevenueBase Database · checked Sep 1, 2026
3	G Data Cyberdefense	Indirect evidence	Bochum, Germany	501-1,000	389 contacts →
	Indirect evidence “Progress is our motivation because we are convinced that it will lead us to a successful future – independent of industries, companies and social classes.” Source: RevenueBase Database · checked Sep 1, 2026
4	Telekom Security	Indirect evidence	Bonn, Germany	1,001-5,000	360 contacts →
	Indirect evidence “We believe in a secure digital future with minimal risk and maximum opportunities.” Source: RevenueBase Database · checked Sep 1, 2026
5	USD AG	Indirect evidence	Neu-Isenburg, Germany	51-200	131 contacts →
	Indirect evidence “Die usd AG schützt Unternehmen vor Hackern und Kriminellen.” Source: RevenueBase Database · checked Sep 1, 2026
6	SEC Consult Group	Indirect evidence	Bochum, Germany	201-500	98 contacts →
	Indirect evidence “SEC Consult is one of the leading consultancies in the area of cyber and application security.” Source: RevenueBase Database · checked Sep 1, 2026
7	R-Tec IT Security Gmbh	Indirect evidence	Wuppertal, Germany	51-200	83 contacts →
	Indirect evidence “r-tec IT Security ist seit über 25 Jahren auf IT-Sicherheit spezialisiert.” Source: RevenueBase Database · checked Sep 1, 2026
8	Secuinfra Gmbh	Partial evidence	Berlin, Germany	51-200	71 contacts →
	Partial evidence “SECUINFRA, expert and partner for cyber defense, has specialized in the detection, analysis and defense against cyber attacks since 2010.” Source: RevenueBase Database · checked Sep 1, 2026
9	Indevis Gmbh	Indirect evidence	Munich, Germany	51-200	70 contacts →
	Indirect evidence “Argos Security zählt zu den führenden Managed Security Service Providern (MSSP) im DACH-Raum und unterstützt den gehobenen Mittelstand, Konzerne und öffentliche Auftraggeber mit…” Source: RevenueBase Database · checked Sep 1, 2026
10	Syss Gmbh	Indirect evidence	Frankfurt, Germany	51-200	70 contacts →
	Indirect evidence “Die SySS GmbH ist ein herstellerunabhängiger IT-Sicherheitsdienstleister und führender Anbieter für Penetrationstests in der DACH-Region.” Source: RevenueBase Database · checked Sep 1, 2026
11	Ditis Systeme	Indirect evidence	Heidenheim An Der Brenz, Germany	51-200	68 contacts →
	Indirect evidence “ditis - The Security Company!” Source: RevenueBase Database · checked Sep 1, 2026
12	Enginsight Gmbh	Partial evidence	Jena, Germany	51-200	65 contacts →
	Partial evidence “Enginsight ist die praxisnahe und effiziente Cybersecurity Plattform aus Deutschland, für mittelständische Unternehmen, KRITIS und öffentliche Träger.” Source: RevenueBase Database · checked Sep 1, 2026
13	Knodtec Solutions Private Limited	Indirect evidence	Cologne, Germany	51-200	64 contacts →
	Indirect evidence “As a cutting-edge technology company, we specialize in delivering state-of-the-art services that empower organizations to thrive in the digital era.” Source: RevenueBase Database · checked Sep 1, 2026
14	Mispa Technologies Gmbh	Indirect evidence	Langenfeld Rheinland, Germany	51-200	63 contacts →
	Indirect evidence “We, mispa Technologies GmbH, a leading IT security and service provider, deliver consulting, design and managed services to help our customers get the most out of their IT…” Source: RevenueBase Database · checked Sep 1, 2026
15	Water IT Security & Defense	Partial evidence	Dusseldorf, Germany	51-200	55 contacts →
	Partial evidence “water is a cybersecurity company that provides holistic IT security solutions to keep your business safe.” Source: RevenueBase Database · checked Sep 1, 2026
16	Blaze Information Security	Indirect evidence	Berlin, Germany	51-200	51 contacts →
	Indirect evidence “Blaze Information Security is a CREST-accredited penetration testing and offensive security firm, trusted by 300+ organizations across 25+ countries.” Source: RevenueBase Database · checked Sep 1, 2026
17	Concentrade Gmbh	Partial evidence	Koln, Germany	51-200	51 contacts →
	Partial evidence “Just stronger Cybersecurity - Beratung, Konzeption, Umsetzung und Aufrechterhaltung von Maßnahmen rund um die IT-Security gehört zu unseren Leistungen.” Source: RevenueBase Database · checked Sep 1, 2026
18	Medialine Security	Indirect evidence	Stuttgart, Germany	51-200	51 contacts →
	Indirect evidence “Medialine Security – 360° Cyber Security Expertise Seit über 30 Jahren schützen wir Unternehmen vor Cyberbedrohungen.” Source: RevenueBase Database · checked Sep 1, 2026
19	Prosec Gmbh	Indirect evidence	Munchen, Germany	51-200	49 contacts →
	Indirect evidence “ProSec GmbH verwandelt Unternehmen in digitale Festungen.” Source: RevenueBase Database · checked Sep 1, 2026
20	Hvs-Consulting	Indirect evidence	Garching, Germany	51-200	46 contacts →
	Indirect evidence “HvS-Consulting AG is consulting large and medium-sized companies on the topic of cyber security since 2002.” Source: RevenueBase Database · checked Sep 1, 2026
21	Forenova Technologies Gmbh	Indirect evidence	Nuremberg, Germany	51-200	45 contacts →
	Indirect evidence “ForeNova helps Small and Medium Enterprises leverage existing cyber security solutions to improve the detection of hidden security threats with greater speed and precision.” Source: RevenueBase Database · checked Sep 1, 2026
22	Consecur Gmbh	Indirect evidence	Bochum, Germany	51-200	38 contacts →
	Indirect evidence “As IT security company we protect your electronical stored data against cyber attacks.” Source: RevenueBase Database · checked Sep 1, 2026
23	BDO Cyber Security Gmbh	Indirect evidence	Dusseldorf, Germany	51-200	38 contacts →
	Indirect evidence “BDO Cyber Security GmbH is your competent partner in all in all cyber security matters.” Source: RevenueBase Database · checked Sep 1, 2026
24	Communication Systems Gmbh	Indirect evidence	Neu-Isenburg, Germany	51-200	36 contacts →
	Indirect evidence “Wir sind die Com-Sys!” Source: RevenueBase Database · checked Sep 1, 2026
25	DGC AG	Indirect evidence	Flensburg, Germany	51-200	33 contacts →
	Indirect evidence “Die DGC AG ist ein Unternehmen für All-in-One Cybersicherheitslösungen.” Source: RevenueBase Database · checked Sep 1, 2026

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: cybersecurity defense contractors. 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 cybersecurity defense contractors.
Partial evidence: Its own public description names part of cybersecurity defense contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity defense contractors. 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 374 cybersecurity defense contractors based in Germany

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Cybersecurity defense contractors based in Germany at a glance

As of Sep 1, 2026

30.5%Verified-email coverage

2.6%Mobile-number coverage

15.5Average contacts per company

1-10Median size (employees)

10.4%Largest-city concentration · Berlin

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

201

11-50

125

51-200

201-500

501-1,000

1,001-5,000

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 cybersecurity defense contractors, 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 Germany whose own description of what they do matches “cybersecurity defense contractors”. 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 cybersecurity defense contractors), 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 cybersecurity defense contractors, 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 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, 1,774 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 1, 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.

Cybersecurity defense contractors by metro

Cybersecurity defense contractors in Berlin39

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 cybersecurity defense contractors, 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 cybersecurity defense contractors are there based in Germany?

RevenueBase identified 374 cybersecurity defense contractors 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?

MTI, headquartered in Munchen, tops this list with the largest team on record.

Which city has the most cybersecurity defense contractors?

Berlin leads with 39 headquartered companies, followed by Munich (21) and Koln (15).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,774 verified decision-maker contacts tracked across these 374 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 1, 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.