Company lists · Data refreshed September 2026

Top 25 Audit defense firms based in Cologne, Germany

Name: Audit defense firms based in Cologne, Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 89 companies tracked

RevenueBase identified 89 audit defense firms headquartered in Cologne, Germany as of September 2026 and tracks 676 professional contacts across them, including 238 with verified work emails. Across Germany, Berlin is the largest hub for this category (187 companies); Cologne has 89.

This list covers audit defense firms headquartered in Cologne, 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 30, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

89Companies

676Contacts tracked

238Verified emails

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The 25 largest audit defense firms based in Cologne, Germany

Ranked by team size

Top 25 of 89 audit defense firms based in Cologne, Germany, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to audit defense firms: 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	Ypsilon Group	Partial evidence	Cologne, GermanyHQ checked Sep 30, 2026	201-500	71 contacts →
	Partial evidence “Ypsilon ist ein junges, inhabergeführtes Beratungsunternehmen mit drei integrierten Geschäftsbereichen – Tax, Audit & Advisory – und mehr als 220 hochqualifizierte…” Source: RevenueBase Database · checked Sep 30, 2026
2	Juhn Partner Gmbh Steuerberatungsgesellschaft	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	51-200	68 contacts →
	Indirect evidence “Unsere Steuerberater in Köln, Düsseldorf, Frankfurt, Bonn und Dubai haben sich besonders auf die Steuerberatung von Kapitalgesellschaften und Personengesellschaften spezialisiert.” Source: RevenueBase Database · checked Sep 30, 2026
3	Laufenberg Michels UND Partner MBB	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	51-200	59 contacts →
	Indirect evidence “Laufenberg Michels und Partner setzt als Steuerberater und Wirtschaftsprüfer in Köln den Schwerpunkt auf eine aktive und strategische Beratung.” Source: RevenueBase Database · checked Sep 30, 2026
4	Bietmann Rechtsanwälte Steuerberater	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	51-200	46 contacts →
	Indirect evidence “Bietmann Rechtsanwälte Steuerberater – Kompetenz aus einer Hand Seit über 35 Jahren vereinen wir bei der Sozietät Bietmann das Know-how aus Rechtsberatung, Steuerberatung…” Source: RevenueBase Database · checked Sep 30, 2026
5	LHP Gruppe	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	34 contacts →
	Indirect evidence “LHP Rechtsanwälte Steuerberater ist eine in Köln hauptansässige Rechtsanwaltsgesellschaft mit Schwerpunkten auf den Gebieten Steuerstrafrecht, Steuerstreit sowie Steuergestaltung.” Source: RevenueBase Database · checked Sep 30, 2026
6	Konlus Wirtschaftsprüfer Steuerberater	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	51-200	23 contacts →
	Indirect evidence “Wir - die KONLUS GmbH Wirtschaftsprüfungsgesellschaft Steuerberatungsgesellschaft - sind als Wirtschaftsprüfer, Steuerberater und Unternehmensberater ein umfassender Dienstleister…” Source: RevenueBase Database · checked Sep 30, 2026
7	Dr. Stallmeyer Gmbh	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	51-200	21 contacts →
	Indirect evidence “Gute Beratung – das hat Tradition bei stallmeyer.” Source: RevenueBase Database · checked Sep 30, 2026
8	SRP Wirtschaftsprüfung & Steuerberatung	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	17 contacts →
	Indirect evidence “Bei uns haben Sie einen direkten Ansprechpartner, der Sie unterstützt und den persönlichen Kontakt zu Ihnen pflegt.” Source: RevenueBase Database · checked Sep 30, 2026
9	Axis Rechtsanwälte Gmbh	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	51-200	13 contacts →
	Indirect evidence “Die axis RECHTSANWÄLTE sind Mitglied der multidisziplinären axis BERATUNGSGRUPPE, in der sich Rechtsanwälte, Steuerberater, Wirtschaftsprüfer, Unternehmensberater und Mathematiker…” Source: RevenueBase Database · checked Sep 30, 2026
10	Deltax Wirtschafts- UND Steuerberatungsgesellschaft MBH	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	1-10	11 contacts →
	Indirect evidence “DELTAX Wirtschafts- und Steuerberatungsgesellschaft mbH Steuerberatung is a legal services company based out of 759 Rösrather Str, Köln, Germany.” Source: RevenueBase Database · checked Sep 30, 2026
11	Ltmk Recht & Steuern	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	9 contacts →
	Indirect evidence “LTMK steht für Leimkuhl-Schulz Tarampouskas Marx und Kizil – und damit für erstklassige Rechts- und Steuerberatung auf Augenhöhe mit der Wirtschaft.” Source: RevenueBase Database · checked Sep 30, 2026
12	3t.Law Rechtsanwälte Steuerberater Partnerschaft MBB	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	1-10	8 contacts →
	Indirect evidence “Rechtsanwälte Steuerberater Partnerschaft mbB Attorneys (DE) & Tax Advisors (DE) BERLIN \| COLOGNE \| MUNICH” Source: RevenueBase Database · checked Sep 30, 2026
13	Triplex Lenzen Kaup UND Többens GBR	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	6 contacts →
	Indirect evidence “Wirtschaftsprüfung Steuerberatung Rechtsberatung” Source: RevenueBase Database · checked Sep 30, 2026
14	Pandotax Steuerberatung Gmbh	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	6 contacts →
	Indirect evidence “Stellen Sie sich vor, Sie hätten einen Partner an Ihrer Seite, dem mehrere hundert Kunden seit über 30 Jahren vertrauen.” Source: RevenueBase Database · checked Sep 30, 2026
15	Komutax Steuerberatungsgesellschaft MBH	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	6 contacts →
	Indirect evidence “KOMUTAX Steuerberatungsgesellschaft mbH mit Standorten in Köln, Düsseldorf und Bremen” Source: RevenueBase Database · checked Sep 30, 2026
16	OFM Oebel Fröhlich Michels Gmbh	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	5 contacts →
	Indirect evidence “We are a modern auditing and tax law firm in the heart of Cologne with interesting clients from a wide range of fields (e.g.” Source: RevenueBase Database · checked Sep 30, 2026
17	Taavas Gmbh WPG	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	1-10	5 contacts →
	Indirect evidence “Wir sind eine Wirtschaftsprüfungskanzlei mit einem hochmotivierten Team, die gezielt auf die Digitalisierung setzt.” Source: RevenueBase Database · checked Sep 30, 2026
18	Hacker & Partner Steuerberatungsgesellschaft Partg MBB	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	5 contacts →
	Indirect evidence “Innovative Beratung für Ihren wirtschaftlichen Erfolg!” Source: RevenueBase Database · checked Sep 30, 2026
19	Löhr Partnerschaftsgesellschaft MBB	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	4 contacts →
	Indirect evidence “Willkommen bei Löhr - Ihrem Partner für Steuer, Rechts- und Unternehmensberatung Unsere Leidenschaft eröffnet unseren Mandanten Freiräume.” Source: RevenueBase Database · checked Sep 30, 2026
20	Zacharias & Demmer	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	4 contacts →
	Indirect evidence “Unsere Stärke sind Zahlen.” Source: RevenueBase Database · checked Sep 30, 2026
21	Akkurata Treuhand Gmbh	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	4 contacts →
	Indirect evidence “Unser Unternehmen besteht seit 1982 und beschäftigt Wirtschaftsprüfer und Steuerberater mit langjähriger Erfahrung im Bereich der Wirtschaftsprüfung und Steuerberatung.” Source: RevenueBase Database · checked Sep 30, 2026
22	Fuhs Hastrich Bartsch Steuerberatungsgesellschaft MBH & Co. KG	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	3 contacts →
	Indirect evidence “Laufende und strategische Steuerberatung Als Kanzlei in Köln und Bonn haben wir uns auf die Beratung von mittelständischen Unternehmen und Non-Profit Organisationen spezialisiert.” Source: RevenueBase Database · checked Sep 30, 2026
23	AHW Hunold & Partner MBB Steuerberater Wirtschaftsprüfer Rechtsanwälte	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	51-200	3 contacts →
	Indirect evidence “Wir machen Ihre (Geschäfts-)Welt ein Stück besser!” Source: RevenueBase Database · checked Sep 30, 2026
24	Optaxium Steuerberatungsgesellschaft MBH	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	11-50	3 contacts →
	Indirect evidence “Die optaxium Steuerberatungsgesellschaft mbH ist Ihr kompetenter Partner für digitale und proaktive Steuerberatung.” Source: RevenueBase Database · checked Sep 30, 2026
25	Nacken Hillebrand Partner Gmbh	Indirect evidence	Cologne, GermanyHQ checked Sep 30, 2026	1-10	3 contacts →
	Indirect evidence “Nacken Hillebrand Partner GmbH is a company based out of Köln, Germany.” Source: RevenueBase Database · checked Sep 30, 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: audit defense firms. 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 audit defense firms.
Partial evidence: Its own public description names part of audit defense firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name audit defense firms. 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 89 audit defense firms based in Cologne, Germany

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Audit defense firms based in Cologne, Germany at a glance

As of Sep 30, 2026

35.2%Verified-email coverage

7.6Average contacts per company

11-50Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole Germany list rather than for Cologne, so it is reported there. Company counts and contact totals on this page are exact for Cologne, over 89 companies.

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 audit defense firms, 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 Cologne, Germany whose own description of what they do matches “audit defense firms”. 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 audit defense firms), 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 audit defense firms, and records with no verified work email. Companies headquartered outside Cologne 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, 238 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 30, 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.

Audit defense firms by metro in Germany

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 audit defense firms, 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 audit defense firms are there based in Cologne, Germany?

RevenueBase identified 89 audit defense firms headquartered in Cologne, 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?

Ypsilon Group, headquartered in Cologne, tops this list with the largest team on record.

Which city in Germany has the most audit defense firms?

Berlin leads Germany with 187 headquartered companies, followed by Munich (173) and Hamburg (144). Cologne has 89.

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 238 verified decision-maker contacts tracked across these 89 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 30, 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.