Company lists · Data refreshed September 2026
Top 25 Security auditing firms based in Germany
RevenueBase identified 337 security auditing firms headquartered in Germany as of September 2026 and tracks 2,996 professional contacts across them, including 1,312 with verified work emails and 36 with mobile numbers. Berlin is the largest hub.
This list covers security auditing firms 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 6, 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 25 largest security auditing firms based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 386 | ||||
“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 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 363 | ||||
“Wir glauben an eine sichere digitale Zukunft mit minimalen Risiken und maximalen Chancen.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 130 | ||||
“Die usd AG schützt Unternehmen vor Hackern und Kriminellen.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 111 | ||||
“TÜV Informationstechnik GmbH (headquartered in Essen, Germany) is a renowned IT security service provider and an independent testing institute and laboratory for IT security and…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 69 | ||||
“ditis - The Security Company!” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 69 | ||||
“Die SySS GmbH ist ein herstellerunabhängiger IT-Sicherheitsdienstleister und führender Anbieter für Penetrationstests in der DACH-Region.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 49 | ||||
“ProSec GmbH verwandelt Unternehmen in digitale Festungen.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 46 | ||||
“HvS-Consulting AG is consulting large and medium-sized companies on the topic of cyber security since 2002.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 40 | ||||
“BDO Cyber Security GmbH is your competent partner in all in all cyber security matters.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 37 | ||||
“As an owner-managed company, admeritia GmbH turned to industrial IT security shortly after its foundation in 2004.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 37 | ||||
“Ihr SOC-Partner im DACH-Mittelstand.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 33 | ||||
“SAMA PARTNERS Business Solutions ist ein unabhängiges Beratungs- und Engineering-Unternehmen mit Hauptsitz in Mannheim, mit den Schwerpunkten Informationssicherheit, KI und…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 32 | ||||
“CLOUDYRION is a start-up for IT security consulting from Düsseldorf.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 28 | ||||
“Simplifying Your Security Journey Welcome to mgm security partners GmbH – your reliable partner for simple and effective IT security solutions.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 25 | ||||
“Squalify provides full spectrum clarity for strategic decision makers who seek to eliminate cyber risk surprises – with superior data, innovative risk assessment tools, and proven…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 23 | ||||
“Aus s-consit wird ETL consit.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 22 | ||||
“Digitale Bedrohungen wachsen – und damit unsere Verantwortung.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 21 | ||||
“Unser Ziel ist es, für Sie Produkte und Lösungen zu entwickeln, welche gleichzeitig widerstandsfähig gegen Angriffe und Manipulationen sind, um Daten und Prozesse zu schützen.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | SecoriPartial evidence | 20 | |||
“secori advisors is a management consultancy with a focus on security, risk, and compliance.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | 19 | ||||
“link protect GmbH is an information technology and services company based out of Münchner Straße 92, Kirchseeon, Bavaria, Germany.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 19 | ||||
“Ihr zuverlässiger Partner für Consulting, Training und Services im Bereich Datenschutz und Informationssicherheit.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 19 | ||||
“SCHUTZWERK GmbH is an international IT security consultancy.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 18 | ||||
“Durch unsere Beratung helfen wir unseren Kunden die Sicherheit und Effizienz ihrer IT nachhaltig zu steigern und ihre IT-Risiken zu kontrollieren.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 18 | ||||
“Cure53 offers classic black-box penetration tests (zero-knowledge) as well as white-box tests and code audits.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 18 | ||||
“Wir sind ein Security House.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 337 security auditing firms based in Germany
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Security auditing firms based in Germany at a glance
As of Sep 6, 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 security auditing firms, 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 “security auditing firms”. 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 security auditing firms, 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, 1,312 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 6, 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.
Security auditing firms by metro
- Security auditing firms in Berlin32
Frequently asked
How many security auditing firms are there based in Germany?
RevenueBase identified 337 security auditing firms 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?
G Data Cyberdefense, headquartered in Bochum, tops this list with the largest team on record.
Which city has the most security auditing firms?
Berlin leads with 32 headquartered companies, followed by Munich (15) and Hamburg (13).
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 1,312 verified decision-maker contacts tracked across these 337 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 6, 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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