Company lists · Data refreshed September 2026

Top 25 Accounting and outsourcing companies based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 555 companies tracked

RevenueBase identified 555 accounting and outsourcing companies headquartered in Switzerland as of September 2026 and tracks 2,191 professional contacts across them, including 832 with verified work emails and 41 with mobile numbers. Zurich is the largest hub.

This list covers accounting and outsourcing 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 22, 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 22, 2026 86% judged on-target in blind review

555Companies

2,191Contacts tracked

832Verified emails

41Mobile numbers

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The 25 largest accounting and outsourcing companies based in Switzerland

Ranked by team size

Top 25 of 555 accounting and outsourcing companies based in Switzerland, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to accounting and outsourcing 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Gewerbe-Treuhand AG	Indirect evidence	Luzern, SwitzerlandHQ checked Sep 22, 2026	51-200	107 contacts →
	Indirect evidence “Unternehmen erwirtschaften ihre Wertschöpfung, indem sie sich voll und ganz für ihre Kunden einsetzen.” Source: RevenueBase Database · checked Sep 22, 2026
2	Avanta	Partial evidence	Baar, SwitzerlandHQ checked Sep 22, 2026	51-200	78 contacts →
	Partial evidence “Accounting, Audit, HR, Tax, Legal and Insurance: Our specialists take over all services along your value chain, allowing you to focus fully on your core competencies.” Source: RevenueBase Database · checked Sep 22, 2026
3	PKF Fiduciaire SA	Indirect evidence	Genève, SwitzerlandHQ checked Sep 22, 2026	51-200	34 contacts →
	Indirect evidence “PKF Fiduciaire SA est spécialisée dans l'audit, l'expertise comptable, le conseil fiscal, la gestion des salaires et l'administration de sociétés.” Source: RevenueBase Database · checked Sep 22, 2026
4	Fineac Treuhand TAX Audit	Indirect evidence	Zug, SwitzerlandHQ checked Sep 22, 2026	11-50	27 contacts →
	Indirect evidence “Unabhängig von der Grösse des Anliegens: Wir von Fineac klären mit Ihnen die genauen Bedürfnisse ab und entwickeln für Sie das beste Dienstleistungspaket – individuell und…” Source: RevenueBase Database · checked Sep 22, 2026
5	Expertinum AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 22, 2026	11-50	21 contacts →
	Indirect evidence “Als erfahrene Treuhandpartnerin mit fünf Standorten im Kanton Zürich begleiten wir Unternehmen und Privatpersonen mit persönlicher Beratung, hoher Fachkompetenz und einem klaren…” Source: RevenueBase Database · checked Sep 22, 2026
6	Value Solutions AG	Indirect evidence	Cham, SwitzerlandHQ checked Sep 22, 2026	11-50	21 contacts →
	Indirect evidence “Highly qualified for tailor-made service” Source: RevenueBase Database · checked Sep 22, 2026
7	Caminada Zurich	Indirect evidence	Stadtkreis 8 Riesbach, SwitzerlandHQ checked Sep 22, 2026	11-50	20 contacts →
	Indirect evidence “We have been acknowledged as an independent, flexible and trustworthy consulting firm since 1946.” Source: RevenueBase Database · checked Sep 22, 2026
8	Z83 AG	Partial evidence	Olten, SwitzerlandHQ checked Sep 22, 2026	11-50	20 contacts →
	Partial evidence “State of the art accounting + CFO Services for Startups und KMU.” Source: RevenueBase Database · checked Sep 22, 2026
9	THV AG	Partial evidence	Aarau, SwitzerlandHQ checked Sep 22, 2026	11-50	19 contacts →
	Partial evidence “thv AG is an Accounting company located in Ziegelrain 29, Zeiningen, Switzerland.” Source: RevenueBase Database · checked Sep 22, 2026
10	Eurex Suisse	Indirect evidence	Chêne-bourg, SwitzerlandHQ checked Sep 22, 2026	11-50	18 contacts →
	Indirect evidence “La technologie au service du conseil, l’humain au cœur de la performance.” Source: RevenueBase Database · checked Sep 22, 2026
11	CV Consulting Sàrl	Partial evidence	Lausanne, SwitzerlandHQ checked Sep 22, 2026	11-50	18 contacts →
	Partial 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: RevenueBase Database · checked Sep 22, 2026
12	KMU Treuhand & Revision	Indirect evidence	Siebnen, SwitzerlandHQ checked Sep 22, 2026	51-200	17 contacts →
	Indirect evidence “KMU Treuhand & Revision – für Sie da.” Source: RevenueBase Database · checked Sep 22, 2026
13	Gfeller Partner AG	Indirect evidence	Langenthal, SwitzerlandHQ checked Sep 22, 2026	11-50	17 contacts →
	Indirect evidence “Gfeller + Partner AG ist ein mittelständisches Dienstleistungsunternehmen, welches Wirtschaftsprüfungs, Steuer- und Beratungsdienstleistungen anbietet.” Source: RevenueBase Database · checked Sep 22, 2026
14	TFP Treuhand AG	Indirect evidence	Appenzell, SwitzerlandHQ checked Sep 22, 2026	11-50	16 contacts →
	Indirect evidence “Die TFP Treuhand AG kann dank einem breit abgestützten Fachwissen eine entsprechend ausgedehnte Dienstleistungspalette anbieten.” Source: RevenueBase Database · checked Sep 22, 2026
15	APO Treuhand AG	Indirect evidence	Ittigen, SwitzerlandHQ checked Sep 22, 2026	11-50	14 contacts →
	Indirect evidence “Die apo treuhand ag mit Sitz in Ittigen bei Bern ist ein unabhängiges Treuhandunternehmen, das Apotheken und andere Firmen im Treuhandbereich unterstützt.” Source: RevenueBase Database · checked Sep 22, 2026
16	Quadrigis SA	Indirect evidence	Yverdon-les-bains, SwitzerlandHQ checked Sep 22, 2026	11-50	14 contacts →
	Indirect evidence “Spécialisée dans le domaine de la sous-traitance comptable et administrative des agences de placement et de location de services, Quadrigis a développé ses propres outils…” Source: RevenueBase Database · checked Sep 22, 2026
17	Abelia Wirtschaftsprüfung UND Beratung AG	Indirect evidence	Basel, SwitzerlandHQ checked Sep 22, 2026	11-50	14 contacts →
	Indirect evidence “Wir entwickeln für Sie individuelle und auf Ihre Bedürfnisse angepasste Lösungen in den Bereichen Treuhand, Wirtschaftsprüfung, Steuern und Unternehmensberatung- Treuhand: Wir…” Source: RevenueBase Database · checked Sep 22, 2026
18	Duttweiler Treuhand AG	Indirect evidence	Liestal, SwitzerlandHQ checked Sep 22, 2026	11-50	14 contacts →
	Indirect evidence “Die Duttweiler Treuhand AG ist Ihre Spezialistin für Buchführungen und Rechnungswesen, Ihre Expertin für Steuerberatungen, Wirtschaftsprüfungen, Unternehmensberatungen und…” Source: RevenueBase Database · checked Sep 22, 2026
19	GP Fiduciaire SA	Indirect evidence	SwitzerlandHQ checked Sep 22, 2026	11-50	14 contacts →
	Indirect evidence “G&P Fiduciaire SA, Genève, est active dans les principaux domaines fiduciaires que sont la comptabilité, la révision, la fiscalité et le conseil d'entreprise, G&P Fiduciaire SA…” Source: RevenueBase Database · checked Sep 22, 2026
20	Aidoo AG	Indirect evidence	Zug, SwitzerlandHQ checked Sep 22, 2026	11-50	13 contacts →
	Indirect evidence “Seit 1982 vertrauen nationale und internationale Gesellschaften und Privatpersonen in den Bereichen Steuern, Rechnungswesen, Unternehmensberatung und Wirtschaftsprüfung auf aidoo.” Source: RevenueBase Database · checked Sep 22, 2026
21	Wettstein & Partner Treuhand AG	Indirect evidence	Jona, SwitzerlandHQ checked Sep 22, 2026	11-50	13 contacts →
	Indirect evidence “How we work Precision, detailed knowledge and accuracy in the bookkeeping characterize us as well as the determination in the creation of decision-making, the thinking and the…” Source: RevenueBase Database · checked Sep 22, 2026
22	Société Fiduciaire D'expertise ET Revision SA	Indirect evidence	SwitzerlandHQ checked Sep 22, 2026	11-50	12 contacts →
	Indirect evidence “Fiduciaire indépendante, genevoise et familiale, active dans l'établissement et la révision des comptes, la fiscalité, les services, le conseil et la gestion, notre approche de…” Source: RevenueBase Database · checked Sep 22, 2026
23	Convicta Treuhand AG	Indirect evidence	Hochdorf, SwitzerlandHQ checked Sep 22, 2026	11-50	12 contacts →
	Indirect evidence “Wir bezeichnen uns als Zahlenakrobaten und Supertreuhänder, arbeiten akribisch von der linken zur rechten Kontoseite und weisen ein enormes Durchhaltevermögen auf, wenn es darum…” Source: RevenueBase Database · checked Sep 22, 2026
24	PRYSM	Partial evidence	Lausanne, SwitzerlandHQ checked Sep 22, 2026	11-50	11 contacts →
	Partial evidence “We provide accounting and payroll services and optimize your tax strategy.” Source: RevenueBase Database · checked Sep 22, 2026
25	Lenz Treuhand AG	Partial evidence	Zürich, SwitzerlandHQ checked Sep 22, 2026	11-50	11 contacts →
	Partial evidence “Lenz Treuhand AG is an accounting company based out of Seefeldstrasse 35, Zürich, Canton of Zurich, Switzerland.” Source: RevenueBase Database · checked Sep 22, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: accounting and outsourcing companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names accounting and outsourcing companies.
Partial evidence: Its own public description names part of accounting and outsourcing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting and outsourcing companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 555 accounting and outsourcing companies based in Switzerland

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Accounting and outsourcing companies based in Switzerland at a glance

As of Sep 22, 2026

38.0%Verified-email coverage

1.9%Mobile-number coverage

3.9Average contacts per company

1-10Median size (employees)

7.6%Largest-city concentration · Zurich

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

444

11-50

51-200

201-500

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 24.0d

6150–30

21031–60

761–90

090–180

0180+

Company record updated

Median 74.0d

00–30

29831–60

1,39061–90

38190–180

122180+

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 and outsourcing 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 “accounting and outsourcing 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 accounting and outsourcing 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 accounting and outsourcing 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, 832 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 22, 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.

Accounting and outsourcing companies by metro

Accounting and outsourcing companies in Zurich42
Accounting and outsourcing companies in Geneve29

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 accounting and outsourcing 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 accounting and outsourcing companies are there based in Switzerland?

RevenueBase identified 555 accounting and outsourcing 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?

Gewerbe-Treuhand AG, headquartered in Luzern, tops this list with the largest team on record.

Which city has the most accounting and outsourcing companies?

Zurich leads with 42 headquartered companies, followed by Geneve (29) and Lausanne (18).

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 832 verified decision-maker contacts tracked across these 555 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 22, 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.