Company lists · Data refreshed September 2026
Top 23 IT security companies based in Germany
RevenueBase identified 580 IT security companies headquartered in Germany as of September 2026 and tracks 7,271 professional contacts across them, including 2,336 with verified work emails and 171 with mobile numbers. Berlin is the largest hub.
This list covers IT 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 4, 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 23 largest IT security companies based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 620 | ||||
“secunet – Protecting Digital Infrastructures secunet is Germany’s leading cybersecurity company.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | 389 | ||||
“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: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | 360 | ||||
“We believe in a secure digital future with minimal risk and maximum opportunities.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 131 | ||||
“Die usd AG schützt Unternehmen vor Hackern und Kriminellen.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | 128 | ||||
“CS VISOR is a leading cyber security education/training center and professional recruitment & IT security service provider, dedicated to- help people in changing their careers to…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | 98 | ||||
“Rohde & Schwarz Cybersecurity is a leading IT security company that protects companies and public institutions around the world against cyberattacks.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | 85 | ||||
“Exclusive Networks ist ein globaler Cybersecurity- und Netzwerk-Spezialist, der Partnern und Endkunden über bewährte Vertriebswege und auf der Grundlage des technischen Know-hows…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | 83 | ||||
“r-tec IT Security ist seit über 25 Jahren auf IT-Sicherheit spezialisiert.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | 78 | ||||
“8COM is a leading Managed Security Service Provider (MSSP).” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | 71 | ||||
“SECUINFRA, expert and partner for cyber defense, has specialized in the detection, analysis and defense against cyber attacks since 2010.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | 70 | ||||
“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: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | 70 | ||||
“Die SySS GmbH ist ein herstellerunabhängiger IT-Sicherheitsdienstleister und führender Anbieter für Penetrationstests in der DACH-Region.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | 68 | ||||
“ditis - The Security Company!” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | 65 | ||||
“Enginsight ist die praxisnahe und effiziente Cybersecurity Plattform aus Deutschland, für mittelständische Unternehmen, KRITIS und öffentliche Träger.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | 63 | ||||
“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: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | 55 | ||||
“water is a cybersecurity company that provides holistic IT security solutions to keep your business safe.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | 52 | ||||
“The digitized world requires uncompromising IT security to protect organizations, individuals, and services from cyber risks and data loss, ensuring safe digital environments for…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | 51 | ||||
“Blaze Information Security is a CREST-accredited penetration testing and offensive security firm, trusted by 300+ organizations across 25+ countries.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 19 | 51 | ||||
“Just stronger Cybersecurity - Beratung, Konzeption, Umsetzung und Aufrechterhaltung von Maßnahmen rund um die IT-Security gehört zu unseren Leistungen.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 20 | 51 | ||||
“Medialine Security – 360° Cyber Security Expertise Seit über 30 Jahren schützen wir Unternehmen vor Cyberbedrohungen.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 21 | 49 | ||||
“ProSec GmbH verwandelt Unternehmen in digitale Festungen.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 22 | 46 | ||||
“HvS-Consulting AG is consulting large and medium-sized companies on the topic of cyber security since 2002.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 23 | 45 | ||||
“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: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
Showing 23 of 580 IT security companies based in Germany
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IT security companies based in Germany at a glance
As of Sep 4, 2026Companies by employee count
Verified emails by last verification
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 IT 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 “IT 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 IT 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, 2,336 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 4, 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.
IT security companies by metro
- IT security companies in Berlin54
- IT security companies in Munich26
Frequently asked
How many IT security companies are there based in Germany?
RevenueBase identified 580 IT 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 IT security companies?
Berlin leads with 54 headquartered companies, followed by Munich (26) and Hamburg (19).
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 2,336 verified decision-maker contacts tracked across these 580 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 4, 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.
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