Company lists · Data verified August 2026

Top 25 Accounting firms based in Switzerland

Name: Accounting firms based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 822 companies tracked

There are 822 accounting firms headquartered in Switzerland (RevenueBase, August 2026). RevenueBase tracks 6,049 professional contacts across them, including 2,382 with verified work emails and 83 with mobile numbers. Zurich is the largest hub.

This list covers accounting firms headquartered in Switzerland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

822Companies

6,049Contacts tracked

2,382Verified emails

83Mobile numbers

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The 25 largest accounting firms based in Switzerland

Ranked by team size

Top 25 of 822 accounting firms based in Switzerland, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	BDO Switzerland	Zofingen	1,001-5,000	1,100	702
2	Forvis Mazars In Switzerland	Fribourg	201-500	422	3
3	Balmer-Etienne AG	n/a	51-200	152	95
4	Gewerbe-Treuhand AG	Sursee	51-200	111	64
5	FIDAG	Lausanne	51-200	66	44
6	Treuhand- UND Revisionsgesellschaft Mattig-Suter UND Partner	Zurich	51-200	63	1
7	Aeberli Treuhand AG	Zurich	11-50	52	36
8	Bommer Partner Treuhand	Bern	51-200	46	32
9	Core Partners LTD	Freiburg	51-200	44	3
10	Diacron Group	Lugano	51-200	41	26
11	PWC Switzerland - Legal	Zurich	51-200	35	14
12	PKF Fiduciaire SA	Geneve	51-200	34	25
13	Provida AG	Dietlikon	51-200	29	18
14	Tretor AG	Liestal	11-50	27	15
15	Opes AG	Emmenbrucke	11-50	26	15
16	Hüsser Gmür Partner AG	Baden-Dattwil	11-50	25	16
17	Hoffmann & Partner	Basel	11-50	21	4
18	Caminada Zurich	Zurich	11-50	20	13
19	Fidexaudit SA	Vevey	11-50	20	2
20	THV AG	Aarau	11-50	19	15
21	Findea Ltd. Switzerland	Geneva	11-50	18	11
22	KMU Treuhand & Revision	Siebnen	51-200	17	13
23	Mazars In Switzerland	Geneve	201-500	17	9
24	Duttweiler Treuhand AG	Liestal	11-50	14	8
25	Wettstein & Partner Treuhand AG	Jona	11-50	13	9

Showing 25 of 822 accounting firms based in Switzerland

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Accounting firms based in Switzerland at a glance

As of Aug 28, 2026

1-10Median size (employees)

ZurichLargest hub · 65 HQs

83Contacts with mobile numbers

10Emails re-verified in last 30 days

Companies by employee count

1-10

596

11-50

178

51-200

201-500

1,001-5,000

10001+

Accounting firms by metro

Metro	Companies
Accounting firms in Zurich	65
Accounting firms in Geneve	51
Accounting firms in Lausanne	32
Accounting firms in Zug	27
Accounting firms in Basel	19
Accounting firms in Lugano	19
Accounting firms in Geneva	17

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “accounting firms”, with match quality audited by blind human judging, and headquartered in Switzerland.
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: Contact records re-verify on a rolling cadence; 10 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many accounting firms are there based in Switzerland?

There are 822 accounting firms headquartered in Switzerland as of August 2026 (RevenueBase).

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 accounting firms?

Zurich leads with 65 headquartered companies, followed by Geneve (51) and Lausanne (32).

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 2,382 verified decision-maker contacts tracked across these 822 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.