Company lists · Data verified August 2026

Top 18 Accounting process outsourcing providers based in Switzerland

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 62 companies tracked

There are 62 accounting process outsourcing providers headquartered in Switzerland (RevenueBase, August 2026). RevenueBase tracks 261 professional contacts across them, including 101 with verified work emails and 7 with mobile numbers. Zurich is the largest hub.

This list covers accounting process outsourcing providers 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.

62Companies

261Contacts tracked

101Verified emails

7Mobile numbers

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The 18 largest accounting process outsourcing providers based in Switzerland

Ranked by team size

Top 18 of 62 accounting process outsourcing providers 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	CV Consulting Sàrl	Lausanne	11-50	18	9
3	Primetrust AG	Suhr	11-50	14	7
4	Xellenz Treuhand AG	Zurich	11-50	10	7
5	Tschanz Treuhand AG	Lyss	11-50	10	5
6	Veriduna Treuhand AG	Dubendorf	11-50	8	7
7	Fintrust Partners	Baar	11-50	8	5
8	Gaapex Sàrl	Lausanne	1-10	8	5
9	Infeas AG	Zurich	11-50	4	3
10	Onaccounting AG	Dubendorf	1-10	3	3
11	Lorenzini Finanzen & Administration Gmbh	Untereggen Sankt Gallen	1-10	2	1
12	Arnet Treuhand AG	Luzern	1-10	2	1
13	Proaccounting Gmbh	Lenzburg	1-10	1	1
14	Finaxio	Martigny	1-10	1	1
15	Aimafin AG	Zurich	1-10	1	1
16	Oz-Finance Gmbh	Kloten	1-10	1	1
17	Bally Finance Gmbh	Schonenwerd	1-10	1	1
18	Alemi Partners	Rapperswil-Jona Sankt Gallen	1-10	1	1

Showing 18 of 62 accounting process outsourcing providers based in Switzerland

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Accounting process outsourcing providers based in Switzerland at a glance

As of Aug 28, 2026

1-10Median size (employees)

ZurichLargest hub · 5 HQs

7Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Accounting process outsourcing providers by metro

Metro	Companies
Accounting process outsourcing providers in Zurich	5
Accounting process outsourcing providers in Lausanne	4
Accounting process outsourcing providers in Baar	3
Accounting process outsourcing providers in Dubendorf	2
Accounting process outsourcing providers in Geneve	2
Accounting process outsourcing providers in Bern	2
Accounting process outsourcing providers in Wettingen	2

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 process outsourcing providers”, 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; 3 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 process outsourcing providers are there based in Switzerland?

There are 62 accounting process outsourcing providers 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 process outsourcing providers?

Zurich leads with 5 headquartered companies, followed by Lausanne (4) and Baar (3).

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 101 verified decision-maker contacts tracked across these 62 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.