Company lists · Data refreshed September 2026

Top 25 Accounting and tax outsourcing companies based in Switzerland

Name: Accounting and tax 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 429 companies tracked

RevenueBase identified 429 accounting and tax outsourcing companies headquartered in Switzerland as of September 2026 and tracks 1,830 professional contacts across them, including 683 with verified work emails and 33 with mobile numbers. Zurich is the largest hub.

This list covers accounting and tax 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

429Companies

1,830Contacts tracked

683Verified emails

33Mobile numbers

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The 25 largest accounting and tax outsourcing companies based in Switzerland

Ranked by team size

Top 25 of 429 accounting and tax 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 tax 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	Strong evidence	Baar, SwitzerlandHQ checked Sep 22, 2026	51-200	78 contacts →
	Strong 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	Fiduciaria Mega SA	Indirect evidence	Lugano, SwitzerlandHQ checked Sep 22, 2026	51-200	45 contacts →
	Indirect evidence “fiduciariaMega SA offers entrepreneurs, companies and individuals a comprehensive range of national and international consultancy services designed to provide pragmatic…” Source: RevenueBase Database · checked Sep 22, 2026
4	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
5	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
6	Primetax AG	Partial evidence	Zurich, SwitzerlandHQ checked Sep 22, 2026	11-50	21 contacts →
	Partial evidence “PrimeTax provides superior tax consulting services to corporations and individuals.” Source: RevenueBase Database · checked Sep 22, 2026
7	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
8	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
9	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
10	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
11	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
12	Moore Zürich AG	Indirect evidence	Glattbrugg, SwitzerlandHQ checked Sep 22, 2026	11-50	19 contacts →
	Indirect evidence “MOORE Zürich AG - Treuhand- und Steuerberatung, Zürich-Glattbrugg Fachberatung und Dienstleistungen für natürliche und juristische Personen aus dem Inland und Ausland – Sie…” Source: RevenueBase Database · checked Sep 22, 2026
13	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
14	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
15	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
16	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
17	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
18	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
19	Stieger Treuhand AG	Indirect evidence	Rapperswil-jona, SwitzerlandHQ checked Sep 22, 2026	11-50	12 contacts →
	Indirect evidence “Stieger Treuhand ist ein erfahrenes Treuhandunternehmen mit Sitz in Rapperswil-Jona.” Source: RevenueBase Database · checked Sep 22, 2026
20	PRYSM	Strong evidence	Lausanne, SwitzerlandHQ checked Sep 22, 2026	11-50	11 contacts →
	Strong evidence “We provide accounting and payroll services and optimize your tax strategy.” Source: RevenueBase Database · checked Sep 22, 2026
21	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
22	Künzli Sommer Frey AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “Als alteingesessene Steuerkanzlei betreuen wir seit 1928 hauptsächlich inländische Privatpersonen, Familien und Unternehmen.” Source: RevenueBase Database · checked Sep 22, 2026
23	Prateo SA	Indirect evidence	Pully, SwitzerlandHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “Les voies vers une situation financière sereine sont parsemées de défis complexes et d’opportunités à saisir.” Source: RevenueBase Database · checked Sep 22, 2026
24	Cccg SA	Indirect evidence	Genève 11, SwitzerlandHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “S.A.” Source: RevenueBase Database · checked Sep 22, 2026
25	BMU Treuhand AG	Indirect evidence	Chur, SwitzerlandHQ checked Sep 22, 2026	11-50	10 contacts →
	Indirect evidence “Sie wollen sich selbstständig machen oder Ihre Nachfolge regeln?” 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 tax 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 tax outsourcing companies.
Partial evidence: Its own public description names part of accounting and tax 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 tax 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 429 accounting and tax outsourcing companies based in Switzerland

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Accounting and tax outsourcing companies based in Switzerland at a glance

As of Sep 22, 2026

37.3%Verified-email coverage

1.8%Mobile-number coverage

4.3Average contacts per company

1-10Median size (employees)

9.1%Largest-city concentration · Zurich

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

344

11-50

51-200

10001+

Freshness & accuracy

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

Email last verified

Median 25.0d

5020–30

17431–60

661–90

090–180

1180+

Company record updated

Median 85.0d

00–30

21831–60

1,15261–90

35790–180

103180+

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 tax 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 tax 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 tax 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 tax 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, 683 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 tax outsourcing companies by metro

Accounting and tax outsourcing companies in Zurich39

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 tax 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 tax outsourcing companies are there based in Switzerland?

RevenueBase identified 429 accounting and tax 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 tax outsourcing companies?

Zurich leads with 39 headquartered companies, followed by Geneve (21) and Lausanne (14).

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 683 verified decision-maker contacts tracked across these 429 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.