Company lists · Data verified August 2026

Top 25 Esg consulting firms based in Switzerland

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 293 companies tracked

There are 293 esg consulting firms headquartered in Switzerland (RevenueBase, August 2026). RevenueBase tracks 1,801 professional contacts across them, including 699 with verified work emails and 127 with mobile numbers. Zurich is the largest hub.

This list covers esg consulting firms 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.

293Companies

1,801Contacts tracked

699Verified emails

127Mobile numbers

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The 25 largest esg consulting firms based in Switzerland

Ranked by team size

Top 25 of 293 esg consulting firms 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	Quantis	Lausanne	201-500	332	187
2	Bios Management	Lugano	201-500	214	156
3	Infras	Bern	51-200	61	35
4	Alpha IC Gmbh	Zurich	51-200	58	40
5	HSE Conseils SA	Gland	11-50	31	23
6	Neosys AG	Olten	11-50	29	16
7	Vema S.A. Vema Carbon	Fribourg	11-50	23	2
8	Carbotech AG	n/a	11-50	21	5
9	Anthesis Switzerland	Geneva	51-200	20	13
10	BHP Brugger And Partners LTD	Zurich	11-50	19	10
11	WSP Suisse AG	Luzern	201-500	18	9
12	Blossom ET Partenaires	Geneve	11-50	16	4
13	Ipso ECO AG	Rothenburg	11-50	12	9
14	Bureau D'études Impact SA	Martigny	11-50	12	7
15	Oekoskop AG	Basel	11-50	10	3
16	Triplex Energieplaner AG	Sissach	11-50	8	5
17	Black Tree Group	Geneva	11-50	7	3
18	Energies Group	Zug	11-50	6	4
19	2comply Sagl	Lugano	1-10	5	4
20	Sorec Gruppe	n/a	51-200	5	3
21	GUM Consulting SPA	Lugano	11-50	4	4
22	CAC SA	Lutry	1-10	4	2
23	E2 Management Consulting AG	Zurich	1-10	4	2
24	Henovia SA	Lausanne	1-10	4	1
25	Cloud37	Herisau	11-50	3	2

Showing 25 of 293 esg consulting firms based in Switzerland

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Esg consulting firms based in Switzerland at a glance

As of Aug 28, 2026

1-10Median size (employees)

ZurichLargest hub · 52 HQs

127Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

256

11-50

51-200

201-500

Esg consulting firms by metro

Metro	Companies
Esg consulting firms in Zurich	52
Esg consulting firms in Geneva	30
Esg consulting firms in Lausanne	18
Esg consulting firms in Lugano	12
Esg consulting firms in Geneve	9
Esg consulting firms in Basel	9
Esg consulting firms in Zug	6

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 “esg consulting firms”, 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; 0 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 esg consulting firms are there based in Switzerland?

There are 293 esg consulting firms headquartered in Switzerland as of August 2026 (RevenueBase).

What is the largest company on this list?

Quantis, headquartered in Lausanne, tops this list with the largest team on record.

Which city has the most esg consulting firms?

Zurich leads with 52 headquartered companies, followed by Geneva (30) 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 699 verified decision-maker contacts tracked across these 293 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.