Company lists · Data verified August 2026

Top 25 Accounting services outsourcing companies based in Switzerland

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 161 companies tracked

There are 161 accounting services outsourcing companies headquartered in Switzerland (RevenueBase, August 2026). RevenueBase tracks 640 professional contacts across them, including 251 with verified work emails and 16 with mobile numbers. Zurich is the largest hub.

This list covers accounting services outsourcing companies 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.

161Companies

640Contacts tracked

251Verified emails

16Mobile numbers

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The 25 largest accounting services outsourcing companies based in Switzerland

Ranked by team size

Top 25 of 161 accounting services outsourcing companies 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	Avanta	Baar	51-200	77	42
2	Diacron Group	Lugano	51-200	41	26
3	Caminada Zurich	Zurich	11-50	20	13
4	Z83 AG	Olten	11-50	20	11
5	THV AG	Aarau	11-50	19	15
6	CV Consulting Sàrl	Lausanne	11-50	18	9
7	Duttweiler Treuhand AG	Liestal	11-50	14	8
8	Lenz Treuhand AG	Zurich	11-50	11	8
9	Tschanz Treuhand AG	Lyss	11-50	10	5
10	Orava SA	Saint-Sulpice	11-50	10	4
11	Fiduciaire Staehli SA	Morrens	11-50	9	4
12	Dr. Balsiger & Partner AG	Zofingen	11-50	9	3
13	Veriduna Treuhand AG	Dubendorf	11-50	8	7
14	Fintrust Partners	Baar	11-50	8	5
15	Fiduservice S.A	Fribourg	11-50	7	5
16	Agro Treuhand Thurgau AG	Weinfelden	11-50	5	4
17	Truvag Treuhand UND Revisions AG St. Gallen	Sankt Gallen	1-10	5	3
18	Zahlenmacher AG	n/a	1-10	5	2
19	Gb&h Treuhand AG	Frenkendorf	1-10	4	4
20	Infeas AG	Zurich	11-50	4	3
21	Plafida Société Fiduciaire SA & Plafida Immobilier SA	Geneve	11-50	3	2
22	Forbiz AG	Uitikon	11-50	3	1
23	Fidemery SA	Sierre	1-10	3	1
24	Dietrich Treuhand AG	Dubendorf	11-50	2	2
25	Lorenzini Finanzen & Administration Gmbh	Untereggen Sankt Gallen	1-10	2	1

Showing 25 of 161 accounting services outsourcing companies based in Switzerland

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Accounting services outsourcing companies based in Switzerland at a glance

As of Aug 28, 2026

1-10Median size (employees)

ZurichLargest hub · 11 HQs

16Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

127

11-50

51-200

Accounting services outsourcing companies by metro

Metro	Companies
Accounting services outsourcing companies in Zurich	11
Accounting services outsourcing companies in Geneve	8
Accounting services outsourcing companies in Lausanne	7
Accounting services outsourcing companies in Baar	6
Accounting services outsourcing companies in Zug	5
Accounting services outsourcing companies in Olten	3
Accounting services outsourcing companies in Bern	3

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 services outsourcing companies”, 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; 2 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 services outsourcing companies are there based in Switzerland?

There are 161 accounting services outsourcing companies headquartered in Switzerland as of August 2026 (RevenueBase).

What is the largest company on this list?

Avanta, headquartered in Baar, tops this list with the largest team on record.

Which city has the most accounting services outsourcing companies?

Zurich leads with 11 headquartered companies, followed by Geneve (8) and Lausanne (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 251 verified decision-maker contacts tracked across these 161 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.