Company lists · Data refreshed August 2026

Top 25 Accounting outsourcing firms based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Aug 30, 2026 109 companies tracked

There are 109 accounting outsourcing firms headquartered in Switzerland (RevenueBase, August 2026). RevenueBase tracks 395 professional contacts across them, including 149 with verified work emails and 13 with mobile numbers. Zurich is the largest hub.

This list covers accounting outsourcing firms 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 August 30, 2026.

109Companies

395Contacts tracked

149Verified emails

13Mobile numbers

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The 25 largest accounting outsourcing firms based in Switzerland

Ranked by team size

Top 25 of 109 accounting outsourcing firms based in Switzerland, ranked by team size, largest first. Data refreshed Aug 30, 2026. Evidence rates how directly each company's own description names accounting outsourcing firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts	Verified emails
1	Diacron GroupPartial evidence “Diacron Group provides accounting, tax and corporate services.” Source: company website · checked Aug 30, 2026	Lugano, Switzerland	51-200	41	26
2	Z83 AGPartial evidence “State of the art accounting + CFO Services for Startups und KMU.” Source: company website · checked Aug 30, 2026	Olten, Switzerland	11-50	20	11
3	THV AGPartial evidence “thv AG is an Accounting company located in Ziegelrain 29, Zeiningen, Switzerland.” Source: company website · checked Aug 30, 2026	Aarau, Switzerland	11-50	19	15
4	CV Consulting SàrlPartial evidence “Notre société est spécialisée dans l’outsourcing des transactions dans les domaines de gestion comptable, gestion des ressources humaines, gestion de votre administration.” Source: company website · checked Aug 30, 2026	Lausanne, Switzerland	11-50	18	9
5	Xellenz Treuhand AGIndirect evidence “XELLENZ revolutioniert die Buchführung.” Source: company website · checked Aug 30, 2026	Zurich, Switzerland	11-50	10	7
6	Tschanz Treuhand AGIndirect evidence “Immer mehr Banken bieten für Kleinunternehmen und Startups integrierte webbasierte Buchhaltungs- und Auftragssoftware an.” Source: company website · checked Aug 30, 2026	Lyss, Switzerland	11-50	10	5
7	Orava SAIndirect evidence “Concentrez-vous sur ce que vous faites de mieux: exercer votre faculté d’entrepreneur!” Source: company website · checked Aug 30, 2026	Saint-Sulpice, Switzerland	11-50	10	4
8	Fiduciaire Staehli SAIndirect evidence “Une fiduciaire à visage humain La Fiduciaire Staehli, c’est avant tout une écoute et une gamme de services personnalisés pour répondre efficacement à vos soucis administratifs.” Source: company website · checked Aug 30, 2026	Morrens, Switzerland	11-50	9	4
9	Dr. Balsiger & Partner AGIndirect evidence “We are independent auditors, tax advisors and accountants.” Source: company website · checked Aug 30, 2026	Zofingen, Switzerland	11-50	9	3
10	Veriduna Treuhand AGIndirect evidence “Veriduna Treuhand AG is a financial services company based out of Stettbachstrasse 6, Dübendorf, Canton of Zurich, Switzerland.” Source: company website · checked Aug 30, 2026	Dubendorf, Switzerland	11-50	8	7
11	Fintrust PartnersIndirect evidence “We love numbers!” Source: company website · checked Aug 30, 2026	Baar, Switzerland	11-50	8	5
12	JWK Treuhand & Revisions AGIndirect evidence “Ihr Partner für Buchhaltung, Revision und Steuern.” Source: company website · checked Aug 30, 2026	Muri, Switzerland	1-10	6	2
13	Zahlenmacher AGIndirect evidence “Von den Steuern und vom Jahresabschluss über klassische oder digitale Buchhaltung bis hin zur Finanzberatung für kleinere und mittlere Unternehmen bietet Zahlenmacher sämtliche…” Source: company website · checked Aug 30, 2026	Switzerland	1-10	5	2
14	Infeas AGIndirect evidence “Infeas bietet Unternehmen individuelle Lösungen im Bereich Finanzen und den damit verbundenen Themen, somit können Sie sich auf ihr Kerngeschäft konzentrieren.” Source: company website · checked Aug 30, 2026	Zurich, Switzerland	11-50	4	3
15	Digifis Fiduciaria SAIndirect evidence “Offriamo servizi contabili, fiscali e nell'ambito delle risorse umane.” Source: company website · checked Aug 30, 2026	Agno, Switzerland	1-10	3	3
16	AD Acta Treuhand AGIndirect evidence Source: company website · checked Aug 30, 2026	Illnau-Effretikon, Switzerland	1-10	2	2
17	Lorenzini Finanzen & Administration GmbhIndirect evidence “Wir bieten Ihnen Dienstleistungen für eine professionelle Betreuung Ihrer Finanzen und Administration an.” Source: company website · checked Aug 30, 2026	Untereggen Sankt Gallen, Switzerland	1-10	2	1
18	Arnet Treuhand AGIndirect evidence “Mit Ihren Anliegen rund um Rechnungswesen, Steuern, Personaladministration und vielem mehr sind Sie bei uns richtig gelandet.” Source: company website · checked Aug 30, 2026	Luzern, Switzerland	1-10	2	1
19	Proaccounting GmbhIndirect evidence “Wir kümmern uns um deine Buchhaltung.” Source: company website · checked Aug 30, 2026	Lenzburg, Switzerland	1-10	1	1
20	Homeconseil FiduciaireIndirect evidence “Homeconseil s'occupe de tout jusque dans les moindres détails.” Source: company website · checked Aug 30, 2026	Rossens, Switzerland	1-10	1	1
21	Affina GmbhIndirect evidence “Treuhand \| Buchhaltung \| Begleitung für Selbständige und kleine Unternehmen Bei AFFINA GmbH unterstützen wir Menschen, die Verantwortung tragen – Selbständige, Gründerinnen und…” Source: company website · checked Aug 30, 2026	Seltisberg, Switzerland	1-10	1	1
22	Aimafin AGPartial evidence “Keeping control of your accounting obligations requires access to experienced accountants.” Source: company website · checked Aug 30, 2026	Zurich, Switzerland	1-10	1	1
23	FinaxioIndirect evidence “Finaxio est une société de services où vous pouvez externaliser vos besoins en matière de direction financière.” Source: company website · checked Aug 30, 2026	Martigny, Switzerland	1-10	1	1
24	Bally Finance GmbhIndirect evidence “Bally Finance kümmert sich um kontinuierliche und sorgfältige Buchhaltung.” Source: company website · checked Aug 30, 2026	Schonenwerd, Switzerland	1-10	1	1
25	TeamkmuIndirect evidence “teamKMU - wir unterstützen Dich” Source: company website · checked Aug 30, 2026	Stechelberg, Switzerland	1-10	1	1

Showing 25 of 109 accounting outsourcing firms based in Switzerland

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Accounting outsourcing firms based in Switzerland at a glance

As of Aug 30, 2026

1-10Median size (employees)

ZurichLargest hub · 8 HQs

13Contacts with mobile numbers

Aug 30, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

Accounting outsourcing firms by metro

Metro	Companies
Accounting outsourcing firms in Zurich	8
Accounting outsourcing firms in Geneve	7
Accounting outsourcing firms in Lausanne	5
Accounting outsourcing firms in Baar	3
Accounting outsourcing firms in Zug	2
Accounting outsourcing firms in Bern	2
Accounting outsourcing firms in Gelterkinden	2

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 accounting outsourcing firms, 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: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
What qualifies: Companies headquartered in Switzerland whose own description of what they do matches “accounting outsourcing firms”. 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 accounting outsourcing firms, 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.
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, 149 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 August 30, 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 accounting outsourcing firms are there based in Switzerland?

There are 109 accounting outsourcing firms headquartered in Switzerland as of August 2026 (RevenueBase).

What is the largest company on this list?

Diacron Group, headquartered in Lugano, tops this list with the largest team on record.

Which city has the most accounting outsourcing firms?

Zurich leads with 8 headquartered companies, followed by Geneve (7) and Lausanne (5).

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 149 verified decision-maker contacts tracked across these 109 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 30, 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.