Company lists · Data refreshed September 2026

Top 25 Infrastructure security audit services based in Germany

RevenueBase identified 127 company matches for infrastructure security audit services associated with Germany as of September 2026 and tracks 915 professional contacts across them, including 440 with verified work emails. Berlin is the largest hub.

This list covers company matches for infrastructure security audit services associated with Germany, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
127Companies
915Contacts tracked
440Verified emails
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The 25 largest infrastructure security audit services based in Germany

Ranked by team size
Top 25 of 127 company matches for infrastructure security audit services based in Germany, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchNeu-isenburg, GermanyHQ recorded Sep 28, 202651-200130 contacts →

Exact match

“Die usd AG schützt Unternehmen vor Hackern und Kriminellen.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchEssen, GermanyHQ recorded Sep 28, 202651-200111 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchUlm, GermanyHQ recorded Sep 28, 202651-20069 contacts →

Exact match

“ditis - The Security Company!”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchWolnzach, GermanyHQ recorded Sep 28, 202651-20037 contacts →

Exact match

“Ihr SOC-Partner im DACH-Mittelstand.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchAugsburg, GermanyHQ recorded Sep 28, 202611-5031 contacts →

Exact match

“ausecus GmbH delivers IT-Security Consulting and Managed Services for critical infrastructure organisations (KRITIS).”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchMunich, GermanyHQ recorded Sep 28, 202611-5028 contacts →

Exact match

“Simplifying Your Security Journey Welcome to mgm security partners GmbH – your reliable partner for simple and effective IT security solutions.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchStuttgart, GermanyHQ recorded Sep 28, 202611-5021 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchBayern, GermanyHQ recorded Sep 28, 202651-20019 contacts →

Exact match

“link protect GmbH is an information technology and services company based out of Münchner Straße 92, Kirchseeon, Bavaria, Germany.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchUlm, GermanyHQ recorded Sep 28, 202611-5019 contacts →

Exact match

“SCHUTZWERK GmbH is an international IT security consultancy.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchBerlin, GermanyHQ recorded Sep 28, 202611-5017 contacts →

Exact match

“Die GAI NetConsult GmbH ist ein in Deutschland und dem benachbarten Ausland tätiges, unabhängiges Beratungsunternehmen für IT- und OT-Security mit Hauptsitz in Berlin.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchSteinau, GermanyHQ recorded Sep 28, 20261-1017 contacts →

Exact match

“Independent firm offering innovative solutions for Managed Security, Information Security & Risk, Business Continuity, Certification (ISO & PCI) and Computer Forensics.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchDarmstadt, GermanyHQ recorded Sep 28, 202651-20016 contacts →

Exact match

“DIESEC, founded by Carl Dietzel in 2009, is dedicated to securing your most valuable asset - your data.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchUnterhaching, GermanyHQ recorded Sep 28, 202611-5016 contacts →

Exact match

“Protection with Passion Seit über 20 Jahren entwickeln und implementieren wir Sicherheitsstrategien, die den Unternehmenserfolg unserer Kunden in den Mittelpunkt stellen.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchDüsseldorf, GermanyHQ recorded Sep 28, 202611-5016 contacts →

Exact match

“protectONE - akkreditiertes und autorisiertes Consulting- & Trainingsunternehmen für IT Security Lösungen.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchMunich, GermanyHQ recorded Sep 28, 202611-5016 contacts →

Exact match

“Book.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchSaarbrücken, GermanyHQ recorded Sep 28, 20261-1011 contacts →

Exact match

“Sicherheit können wir Wir sind sequire (für: security (engl: Sicherheit) und quire (lateinisch: können))!”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchCologne, GermanyHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“AuditOne delivers modern audit infrastructure and cybersecurity services built for the teams that set the standard for trust.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchWeimar (lahn), GermanyHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“greenhats® is a platform for IT security.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchWalldorf, GermanyHQ recorded Sep 28, 202611-5010 contacts →

Exact match

“WALLSEC specializes in penetration testing and security audits for critical enterprise IT.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchNeumarkt In Der Oberpfalz, GermanyHQ recorded Sep 28, 202611-5010 contacts →

Exact match

“Our work is built on two pillars: expert consulting and the operation of proven security solutions.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchMarl, GermanyHQ recorded Sep 28, 202611-509 contacts →

Exact match

“Full-Service-Dienstleiter im Bereich der IT-Security- Wir helfen Ihnen Ihre Herausforderungen in den Griff zu bekommen oder übernehmen diese vollständig für Sie!”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchHaltern Am See, GermanyHQ recorded Sep 28, 202611-509 contacts →

Exact match

“P&W Netzwerk macht komplexe IT-Infrastrukturen verständlich, kontrollierbar und sicher.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchDüsseldorf, GermanyHQ recorded Sep 28, 20261-109 contacts →

Exact match

“Bei securance glauben wir daran, dass Sicherheit nicht entsteht, weil man mehr Tools kauft oder mehr Checklisten ausfüllt, sondern weil man versteht, was im eigenen Unternehmen…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchLeipzig, GermanyHQ recorded Sep 28, 202611-508 contacts →

Exact match

“SigeniuS is a rapidly growing cybersecurity company that focuses on providing expert consulting and services in IT security, IT risk management, DORA, NIS2, and IAM - nationwide…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchMaintal, GermanyHQ recorded Sep 28, 202611-507 contacts →

Exact match

“CyStrat Services GmbH was founded in 2022 with the clear vision of delivering first-class consulting services in the field of cybersecurity, built on a strong foundation of IT…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 127 infrastructure security audit services based in Germany

See the full list, filter by size, metro and specialty, and access 440 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Infrastructure security audit services based in Germany at a glance

As of Sep 28, 2026
48.1%Verified-email coverage
7.2Average contacts per company
1-10Median size (employees)
8.7%Largest-city concentration · Berlin
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
78
11-50
40
51-200
8
501-1,000
1

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 127 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with Germany whose business descriptions match “infrastructure security audit services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 440 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “infrastructure security audit services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many infrastructure security audit services are there based in Germany?

RevenueBase identified 127 company matches for infrastructure security audit services associated with Germany as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

USD AG tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most infrastructure security audit services?

Berlin leads with 11 company records, followed by Hamburg (6) and Munich (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 440 professional contacts with verified work emails tracked across these 127 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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.