Company lists · Data refreshed September 2026

Top 25 Professional services firms based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,179 companies tracked

RevenueBase identified 1,179 professional services firms headquartered in Switzerland as of September 2026 and tracks 5,662 professional contacts across them, including 2,276 with verified work emails and 113 with mobile numbers. Zurich is the largest hub.

This list covers professional services 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 September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

1,179Companies

5,662Contacts tracked

2,276Verified emails

113Mobile numbers

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The 25 largest professional services firms based in Switzerland

Ranked by team size

Top 25 of 1,179 professional services firms based in Switzerland, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names professional services 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
1	Balmer-Etienne AGIndirect evidence	Luzern, SwitzerlandHQ checked Sep 5, 2026	51-200	148
	“We act for you.” Source: company website · checked Sep 5, 2026
2	Wenger VieliIndirect evidence	Zurich, SwitzerlandHQ checked Sep 5, 2026	51-200	120
	“A reliable partner in legal and taxation matters is always important, both in the best-possible situation, when someone is planning an exciting new project, or in the…” Source: company website · checked Sep 5, 2026
3	Gewerbe-Treuhand AGIndirect evidence	Luzern, SwitzerlandHQ checked Sep 5, 2026	51-200	107
	“Unternehmen erwirtschaften ihre Wertschöpfung, indem sie sich voll und ganz für ihre Kunden einsetzen.” Source: company website · checked Sep 5, 2026
4	AvantaIndirect evidence	Baar, SwitzerlandHQ checked Sep 5, 2026	51-200	78
	“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: company website · checked Sep 5, 2026
5	Oberson Abels SAIndirect evidence	Lancy, SwitzerlandHQ checked Sep 5, 2026	51-200	75
	“OBERSON ABELS is a Swiss law firm exclusively focused on business law advising in the following areas- Tax law (including specific fields of taxation such as taxation of financial…” Source: company website · checked Sep 5, 2026
6	T R AGIndirect evidence	Muri Bei Bern, SwitzerlandHQ checked Sep 5, 2026	51-200	60
	“Die T+R AG ist eine bedeutende regionale Dienstleistungsunternehmung in den Bereichen der Wirtschaftsberatung, der Wirtschaftsprüfung und der Steuerberatung, die Sie bei all Ihren…” Source: company website · checked Sep 5, 2026
7	System AgencyIndirect evidence	Geneva, SwitzerlandHQ checked Sep 5, 2026	11-50	54
	“Leaders in Management” Source: company website · checked Sep 5, 2026
8	Bommer Partner TreuhandStrong evidence	Bern, SwitzerlandHQ checked Sep 5, 2026	51-200	46
	“Für unsere Kunden generieren wir Mehrwert durch professionelle und individuelle Dienstleistungen auf der Basis von persönlichen Beziehungen in den Bereichen Treuhand…” Source: company website · checked Sep 5, 2026
9	Fiduciaria Mega SAIndirect evidence	Lugano, SwitzerlandHQ checked Sep 5, 2026	51-200	45
	“fiduciariaMega SA offers entrepreneurs, companies and individuals a comprehensive range of national and international consultancy services designed to provide pragmatic…” Source: company website · checked Sep 5, 2026
10	Fidinam GroupIndirect evidence	Lugano, SwitzerlandHQ checked Sep 5, 2026	201-500	44
	“Fidinam started its activities in Lugano (Canton Ticino, Switzerland) in 1960, principally providing a wide range of consulting and related services for companies, entrepreneurs…” Source: company website · checked Sep 5, 2026
11	Core Partners LTDIndirect evidence	Düdingen, SwitzerlandHQ checked Sep 5, 2026	51-200	44
	“Four companies with a long tradition sail under the flag of «CORE Partners Ltd»: CORE Treuhand AG, CORE Revision AG, CORE Fiduciaire Revicor SA and CORE Medical AG.” Source: company website · checked Sep 5, 2026
12	WMM GroupIndirect evidence	Lugano, SwitzerlandHQ checked Sep 5, 2026	51-200	43
	“Servizi di consulenza integrata, dal 1972.” Source: company website · checked Sep 5, 2026
13	Echo SAIndirect evidence	Genève, SwitzerlandHQ checked Sep 5, 2026	11-50	37
	“Emblematic figure of the Geneva basin since 1943 Proud of its roots Founded under the name of Société Fiduciaire et de Gérance SA, then known as SFG Conseil SA, the company has…” Source: company website · checked Sep 5, 2026
14	PKF Fiduciaire SAIndirect evidence	Genève, SwitzerlandHQ checked Sep 5, 2026	51-200	34
	“PKF Fiduciaire SA est spécialisée dans l'audit, l'expertise comptable, le conseil fiscal, la gestion des salaires et l'administration de sociétés.” Source: company website · checked Sep 5, 2026
15	Gruppo InterfidaIndirect evidence	Mendrisio, SwitzerlandHQ checked Sep 5, 2026	51-200	34
	“Fondato nel 1960, il Gruppo Interfida si distingue nel mercato della consulenza aziendale, fiscale e immobiliare grazie al suo impegno costante nel fornire servizi qualificati e…” Source: company website · checked Sep 5, 2026
16	Prométhée ConseilIndirect evidence	Petit Lancy, SwitzerlandHQ checked Sep 5, 2026	11-50	34
	“Assurance 🩺 Prévoyance Fiscalité Investissement Immobilier Nos experts et services vous guideront au mieux pour vous apporter la solution la plus optimale.” Source: company website · checked Sep 5, 2026
17	PWC Switzerland - LegalIndirect evidence	Zürich, SwitzerlandHQ checked Sep 5, 2026	51-200	34
	“Swiss legal service provider.” Source: company website · checked Sep 5, 2026
18	DYN GroupStrong evidence	Lausanne, SwitzerlandHQ checked Sep 5, 2026	11-50	33
	“DYN Group brings together qualified professionals to meet your business and wealth management needs.” Source: company website · checked Sep 5, 2026
19	Academix Consult AGIndirect evidence	Trogen, SwitzerlandHQ checked Sep 5, 2026	51-200	30
	“Finanzfragen sind individuell und erlauben keine pauschalen Lösungen.” Source: company website · checked Sep 5, 2026
20	Buchhaltungs UND Revisions AGIndirect evidence	6302 Zug, SwitzerlandHQ checked Sep 5, 2026	11-50	28
	“Our promise since 1962.” Source: company website · checked Sep 5, 2026
21	Fineac Treuhand TAX AuditIndirect evidence	Zug, SwitzerlandHQ checked Sep 5, 2026	11-50	27
	“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: company website · checked Sep 5, 2026
22	Voser RechtsanwälteIndirect evidence	Baden, SwitzerlandHQ checked Sep 5, 2026	11-50	27
	“VOSER Rechtsanwälte erbringt umfassende Dienstleistungen bezüglich der rechtlichen Beratung und Vertretung von Unternehmen, Privatpersonen und der öffentlichen Hand.” Source: company website · checked Sep 5, 2026
23	Opes AGIndirect evidence	Luzern, SwitzerlandHQ checked Sep 5, 2026	11-50	27
	“Willkommen bei Ihrem Partner für Familien & Unternehmen.” Source: company website · checked Sep 5, 2026
24	Tretor AGIndirect evidence	Liestal, SwitzerlandHQ checked Sep 5, 2026	11-50	27
	“Die TRETOR AG gehört zu den führenden Treuhandunternehmen in der Nordwestschweiz.” Source: company website · checked Sep 5, 2026
25	Htlc NetworkIndirect evidence	Chiasso, SwitzerlandHQ checked Sep 5, 2026	51-200	27
	“HTLC Network is a business consulting company providing a wide range of services such as business development, accountging, global payroll, global mobility and business brokerage.” Source: company website · checked Sep 5, 2026

Showing 25 of 1,179 professional services firms based in Switzerland

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Professional services firms based in Switzerland at a glance

As of Sep 5, 2026

1-10Median size (employees)

ZurichLargest hub · 116 HQs

113Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

892

11-50

241

51-200

201-500

501-1,000

5,001-10,000

10001+

Verified emails by last verification

0–30

2,141

31–60

131

61–90

90–180

180+

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 professional services 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: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Switzerland whose own description of what they do matches “professional services 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 professional services 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. 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, 2,276 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 5, 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.

Professional services firms by metro

Professional services firms in Zurich116
Professional services firms in Geneve56
Professional services firms in Lugano49
Professional services firms in Zug42
Professional services firms in Basel36
Professional services firms in Lausanne36
Professional services firms in Geneva27

Frequently asked

How many professional services firms are there based in Switzerland?

RevenueBase identified 1,179 professional services firms 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?

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

Which city has the most professional services firms?

Zurich leads with 116 headquartered companies, followed by Geneve (56) and Lugano (49).

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 2,276 verified decision-maker contacts tracked across these 1,179 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 5, 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 SmartSearch, 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.