Company lists · Data refreshed September 2026

Top 25 Financial services audit companies based in Switzerland

RevenueBase identified 138 financial services audit companies headquartered in Switzerland as of September 2026 and tracks 1,826 professional contacts across them, including 1,048 with verified work emails. Zurich is the largest hub.

This list covers financial services audit 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 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 16, 2026 86% judged on-target in blind review
138Companies
1,826Contacts tracked
1,048Verified emails
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The 25 largest financial services audit companies based in Switzerland

Ranked by team size
Top 25 of 138 financial services audit companies based in Switzerland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to financial services audit companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceZürich, SwitzerlandHQ checked Sep 16, 20261,001-5,0001,090 contacts →

Partial evidence

“BDO is one of the leading audit, accounting and consulting firms in Switzerland.”

Source: RevenueBase Database · checked Sep 16, 2026
2Indirect evidenceSchwyz, SwitzerlandHQ checked Sep 16, 202651-20062 contacts →

Indirect evidence

“Die Treuhand- und Revisionsgesellschaft Mattig-Suter und Partner (MSuP) wurde am 1.”

Source: RevenueBase Database · checked Sep 16, 2026
3Indirect evidenceZürich, SwitzerlandHQ checked Sep 16, 202651-20034 contacts →

Indirect evidence

“Swiss legal service provider.”

Source: RevenueBase Database · checked Sep 16, 2026
4Indirect evidenceRomanshorn, SwitzerlandHQ checked Sep 16, 202651-20026 contacts →

Indirect evidence

“Provida covers the full range of auditing, consulting, tax & law and trust services.”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceStadtkreis 4 Aussersihl, SwitzerlandHQ checked Sep 16, 202611-5025 contacts →

Indirect evidence

“ECOFACT was founded as a spin-off of a leading Swiss bank in Zurich in 1998.”

Source: RevenueBase Database · checked Sep 16, 2026
6Indirect evidenceBasel, SwitzerlandHQ checked Sep 16, 202611-5022 contacts →

Indirect evidence

“Ganz persönlich und alles aus einer Hand: Treuhand, Steuern, Wirtschaftsprüfung und Unternehmensberatung.”

Source: RevenueBase Database · checked Sep 16, 2026
7Indirect evidenceZurich, SwitzerlandHQ checked Sep 16, 2026n/a22 contacts →

Indirect evidence

“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: RevenueBase Database · checked Sep 16, 2026
8Indirect evidenceStadtkreis 8 Riesbach, SwitzerlandHQ checked Sep 16, 202611-5020 contacts →

Indirect evidence

“We have been acknowledged as an independent, flexible and trustworthy consulting firm since 1946.”

Source: RevenueBase Database · checked Sep 16, 2026
9Indirect evidenceLausanne, SwitzerlandHQ checked Sep 16, 202611-5020 contacts →

Indirect evidence

“Depuis plus de 30 années, Fidexaudit accompagne ses clients dans tous les domaines de la fiduciaire.”

Source: RevenueBase Database · checked Sep 16, 2026
10Indirect evidenceSiebnen, SwitzerlandHQ checked Sep 16, 202651-20017 contacts →

Indirect evidence

“KMU Treuhand & Revision – für Sie da.”

Source: RevenueBase Database · checked Sep 16, 2026
11Indirect evidenceWinterthur, SwitzerlandHQ checked Sep 16, 202611-5017 contacts →

Indirect evidence

“Consultive ist Ihr KMU Partner für Revision, Treuhand und Unternehmensberatung in Winterthur.”

Source: RevenueBase Database · checked Sep 16, 2026
12Indirect evidenceLangenthal, SwitzerlandHQ checked Sep 16, 202611-5017 contacts →

Indirect evidence

“Gfeller + Partner AG ist ein mittelständisches Dienstleistungsunternehmen, welches Wirtschaftsprüfungs, Steuer- und Beratungsdienstleistungen anbietet.”

Source: RevenueBase Database · checked Sep 16, 2026
13Partial evidenceGenève, SwitzerlandHQ checked Sep 16, 202611-5016 contacts →

Partial evidence

“GCG propose des services de conseil en matière de conformité (compliance) et de règlementations financières.”

Source: RevenueBase Database · checked Sep 16, 2026
14Indirect evidenceFrauenfeld, SwitzerlandHQ checked Sep 16, 202611-5013 contacts →

Indirect evidence

“In einer partnerschaftlichen Zusammenarbeit begleiten wir Sie in den Bereichen Treuhand, Wirtschaftsprüfung und Steuerberatung.”

Source: RevenueBase Database · checked Sep 16, 2026
15Partial evidenceStadtkreis 3 Wiedikon, SwitzerlandHQ checked Sep 16, 202611-5010 contacts →

Partial evidence

“Ostschweizerische Treuhand Zürich AG, short OTG, has been in business since 1918 as an accredited audit firm conducting full and limited audits.”

Source: RevenueBase Database · checked Sep 16, 2026
16Indirect evidenceLugano, SwitzerlandHQ checked Sep 16, 202611-5010 contacts →

Indirect evidence

“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: RevenueBase Database · checked Sep 16, 2026
17Indirect evidenceZofingen, SwitzerlandHQ checked Sep 16, 202611-509 contacts →

Indirect evidence

“We are independent auditors, tax advisors and accountants.”

Source: RevenueBase Database · checked Sep 16, 2026
18Indirect evidenceBasel, SwitzerlandHQ checked Sep 16, 202611-509 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
19Indirect evidenceAarau, SwitzerlandHQ checked Sep 16, 202611-509 contacts →

Indirect evidence

“Die Expertinnen und Experten von Gruber Partner in Aarau schaffen Klarheit.”

Source: RevenueBase Database · checked Sep 16, 2026
20Indirect evidenceLugano, SwitzerlandHQ checked Sep 16, 20261-108 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
21Indirect evidenceArlesheim, SwitzerlandHQ checked Sep 16, 20261-108 contacts →

Indirect evidence

“Das Team der Birseck-Treuhand AG heisst Sie herzlich willkommen!”

Source: RevenueBase Database · checked Sep 16, 2026
22Indirect evidenceOlten, SwitzerlandHQ checked Sep 16, 20261-108 contacts →

Indirect evidence

“Unser Unternehmen bietet hoch stehende Dienstleistungen in den Bereichen Wirtschaftsprüfung, Buchführung und Abschlussberatung sowie Steuer- und Unternehmensberatung an.”

Source: RevenueBase Database · checked Sep 16, 2026
23Indirect evidenceLuzern, SwitzerlandHQ checked Sep 16, 20261-107 contacts →

Indirect evidence

“Die Lufida-Revision stellt Unternehmen aus allen Branchen ihre Dienstleistungen als unabhängiges und flexibles Wirtschaftsprüfungs- und Beratungsunternehmen zur Verfügung.”

Source: RevenueBase Database · checked Sep 16, 2026
24Partial evidenceBern, SwitzerlandHQ checked Sep 16, 202611-507 contacts →

Partial evidence

“Accounting/Audit/Tax Advice/Management Consultancy”

Source: RevenueBase Database · checked Sep 16, 2026
25Indirect evidence4010, SwitzerlandHQ checked Sep 16, 202611-507 contacts →

Indirect evidence

“Unsere seit über 40 Jahren bestehende Gesellschaft ist spezialisiert auf die Betreuung und Beratung von mittelständischen Unternehmen (KMU), von Personalvorsorgeeinrichtungen…”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 138 financial services audit companies based in Switzerland

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Financial services audit companies based in Switzerland at a glance

As of Sep 16, 2026
57.4%Verified-email coverage
13.2Average contacts per company
1-10Median size (employees)
13.0%Largest-city concentration · Zurich
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
101
11-50
29
51-200
4
1,001-5,000
1
5,001-10,000
1

Email recency for this list is measured worldwide rather than for Switzerland, so it is reported there. Company counts and contact totals on this page are exact for Switzerland, over 138 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 financial services audit companies, 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 Switzerland whose own description of what they do matches “financial services audit companies”. 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 financial services audit companies), 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 financial services audit 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 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, 1,048 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 16, 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

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 financial services audit companies, 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 financial services audit companies are there based in Switzerland?

RevenueBase identified 138 financial services audit 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 Zurich, tops this list with the largest team on record.

Which city has the most financial services audit companies?

Zurich leads with 18 headquartered companies, followed by Geneve (9) and Zug (7).

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 1,048 verified decision-maker contacts tracked across these 138 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 16, 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.