Company lists · Data refreshed September 2026
Top 25 Internal audit consulting companies based in Switzerland
RevenueBase identified 87 internal audit consulting companies headquartered in Switzerland as of September 2026 and tracks 1,502 professional contacts across them, including 845 with verified work emails and 22 with mobile numbers. Zurich is the largest hub.
This list covers internal audit consulting companies headquartered in Switzerland, 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 25 largest internal audit consulting companies based in Switzerland
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,100 | ||||
“BDO is one of the leading audit, accounting and consulting firms in Switzerland.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | 63 | ||||
“Die Treuhand- und Revisionsgesellschaft Mattig-Suter und Partner (MSuP) wurde am 1.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | 21 | ||||
“Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 20 | ||||
“We have been acknowledged as an independent, flexible and trustworthy consulting firm since 1946.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | 17 | ||||
“KMU Treuhand & Revision – für Sie da.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | 10 | ||||
“Ostschweizerische Treuhand Zürich AG, short OTG, has been in business since 1918 as an accredited audit firm conducting full and limited audits.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | Revixpert SAIndirect evidence | 10 | |||
“L’existence de reviXpert SA se fonde sur plusieurs décennies d’expérience acquise en matière de services intégrés au sein des « Big-4 ».” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | 10 | ||||
“PKF Certifica SA is an auditing and corporate consultancy company that is a full member of the PKF global network, counting over 200 member firms in around 150 countries across…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | 9 | ||||
“Die Lufida-Revision stellt Unternehmen aus allen Branchen ihre Dienstleistungen als unabhängiges und flexibles Wirtschaftsprüfungs- und Beratungsunternehmen zur Verfügung.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | 9 | ||||
“Zuhören.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | 9 | ||||
“We are independent auditors, tax advisors and accountants.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | 9 | ||||
“Governance - Audit - Tools, Schulungen & Workshops” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | 8 | ||||
Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 | ||||
“Accounting/Audit/Tax Advice/Management Consultancy” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | 7 | ||||
“The mission of ATCA is to provide our clients with excellent accounting, tax, financial analysis, business consulting, internal control and audit services.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 | ||||
“HLS & Partner is an Audit and Consulting firm which offers a wide range of financial services.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5 | ||||
“ASMA Asset Management Audit & Compliance supports clients of all kinds – from the smallest financial intermediary to listed groups.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | 5 | ||||
“2Comply Sagl was founded in 2020 in Switzerland as an external partner for financial institutions and other companies with the aim to provide them an expert view in risk…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 | ||||
“Wirtschaftsprüfung Unternehmensberatung Steuerberatung Rechnungswesen” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 20 | PEQ GmbhIndirect evidence | 3 | |||
“PEQ GmbH ist ein Prüfungs- und Beratungsunternehmen für im Finanzdienstleistungsbereich tätige Unternehmen.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 21 | Legatax Bertschi AGIndirect evidence | 3 | |||
“Buchführung und Abschlussberatung, Steuer- und Unternehmensberatung sowie Revisionen - wir verknüpfen wo möglich unsere Dienstleistungen mit sinnvollen IT-Lösungen um…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 | ||||
“Wir behalten den Überblick für Sie und Ihr Unternehmen.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 23 | Gefid Conseils SAIndirect evidence | 3 | |||
Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 | ||||
“Unternehmensberatung Steuern Rechnungswesen Revisionen” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 25 | Witreva Treuhand- UND Revisionsgesellschaft AGIndirect evidence | 3 | |||
“Dienstleistungen im klassischen Treuhandwesen gepaart mit innovativen Lösungen sind unsere Stärke.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 87 internal audit consulting companies based in Switzerland
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Internal audit consulting companies based in Switzerland 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 internal audit consulting 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 Switzerland whose own description of what they do matches “internal audit consulting 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 internal audit consulting companies, and records with no verified work email. Companies headquartered outside Switzerland 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, 845 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.
Frequently asked
How many internal audit consulting companies are there based in Switzerland?
RevenueBase identified 87 internal audit consulting companies headquartered in Switzerland 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?
BDO Switzerland, headquartered in Zofingen, tops this list with the largest team on record.
Which city has the most internal audit consulting companies?
Zurich leads with 14 headquartered companies, followed by Zug (5) and Geneve (4).
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 845 verified decision-maker contacts tracked across these 87 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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