Company lists · Data refreshed September 2026

Top 25 Ecological consulting firms based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 161 companies tracked

RevenueBase identified 161 company matches for ecological consulting firms associated with Switzerland as of September 2026 and tracks 1,642 professional contacts across them, including 717 with verified work emails and 62 with mobile numbers. Zurich is the largest hub.

This list covers company matches for ecological consulting firms associated with Switzerland, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 1, 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 RevenueBase SmartSearch · Exact Recorded Sep 1, 2026 How this list was built

161Companies

1,642Contacts tracked

717Verified emails

62Mobile numbers

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The 25 largest ecological consulting firms based in Switzerland

Ranked by team size

Top 25 of 161 company matches for ecological consulting firms based in Switzerland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Quantis	Exact match	Lausanne, Switzerland	201-500	332 contacts →
	Exact match “Quantis, part of BCG, is a sustainability consulting firm that helps organizations translate sustainability ambition into measurable business value.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
2	Holinger	Exact match	Liestal Basel, Switzerland	501-1,000	264 contacts →
	Exact match “For over 90 years, HOLINGER has been solving engineering and scientific tasks in various specialist areas related to the water cycle.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
3	Jauslin Stebler AG	Exact match	Zurich, Switzerland	51-200	108 contacts →
	Exact match “Die komplexen Rahmenbedingungen erfordern eine ganzheitliche Sicht der Probleme, kreative Prozesse und eine entsprechend eingespielte Organisation.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
4	Infras	Exact match	Bern, Switzerland	51-200	61 contacts →
	Exact match “INFRAS has been doing research and consulting focused on sustainable development since 1976.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
5	Econetta	Exact match	Schlieren, Switzerland	51-200	56 contacts →
	Exact match “Econetta ist ein führendes Schweizer Umweltberatungsunternehmen.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
6	Ecosens AG	Exact match	Wallisellen, Switzerland	51-200	41 contacts →
	Exact match “Langjährige Erfahrung und Nähe zu aktuellen Entwicklungen in sämtlichen umweltrelevanten Fragestellungen machen Ecosens zum führenden Beratungsunternehmen.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
7	Ecotec Environnement SA	Exact match	Geneva, Switzerland	11-50	33 contacts →
	Exact match “ECOTEC Environnement SA is a renewables and environment company based out of Rue Francois-Ruchon 3, Geneve, Geneve, Switzerland.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
8	HSE Conseils SA	Exact match	Gland, Switzerland	11-50	31 contacts →
	Exact match “Nous accompagnons les acteurs de la construction et de l’immobilier dans la gestion des polluants, la sécurité et la préservation de l’environnement.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
9	Planikum AG	Exact match	Zurich, Switzerland	11-50	23 contacts →
	Exact match “planikum gestaltet zukunftsorientierte Lebensräume und Infrastrukturen für Stadt und Land.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
10	Sieber Cassina Partner AG	Exact match	Winterthur, Switzerland	11-50	23 contacts →
	Exact match “Unsere Dienstleistungen stehen oft im Spannungsfeld von Nutzungs- und Schutzinteressen.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
11	Carbotech AG	Exact match	Switzerland	11-50	21 contacts →
	Exact match “Carbotech Inc.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
12	Ingenias AG	Exact match	St. Gallen, Switzerland	11-50	18 contacts →
	Exact match “Ingenias ist Ihr Umwelt-Ingenieurbüro für anspruchsvolle Aufgaben in den Bereichen Umwelt, Wasser und Geologie.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
13	BSS Volkswirtschaftliche Beratung	Exact match	Basel, Switzerland	11-50	17 contacts →
	Exact match “BSS hat sich seit der Gründung im Jahr 1992 zu einem der führenden Schweizer Beratungsbüros für Fragen zu Wirtschaft, Umwelt und Gesellschaft entwickelt.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
14	Adolf Krebs AG	Exact match	Grund Bei Gstaad, Switzerland	51-200	16 contacts →
	Exact match “Aber ebenso viel mit harten Kalkulationen, Energiemanagement, mit Wissen, was zu tun ist.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
15	ILU AG	Exact match	Horw, Switzerland	11-50	14 contacts →
	Exact match “ilu AG Mit Begeisterung planen wir unsere zukünftigen Tätigkeiten, wobei wir uns gleichermassen dem Erfolg unserer Kunden wie auch unser aller Verantwortung gegenüber der Umwelt…” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
16	Agrexis AG	Exact match	Basel, Switzerland	11-50	14 contacts →
	Exact match “AGREXIS is an independent consulting company offering expert and regulatory consulting to the Agrochemical and Biocidal industry.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
17	Drosera Ecologie Appliquée SA	Exact match	Sion, Switzerland	11-50	14 contacts →
	Exact match “Fondé en 1991, le bureau d’étude Drosera Ecologie Appliquée SA met au service des collectivités publiques et des entreprises privées ses compétences dans le domaine de…” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
18	RSK Dach-Region	Exact match	Olten, Switzerland	201-500	14 contacts →
	Exact match “Die RSK-Gruppe mit Hauptsitz in Großbritannien ist mit mehr als 200 Unternehmen in den Bereichen Umweltwissenschaften, Ingenieurwesen und technische Dienstleistungen in über 40…” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
19	Ipso ECO AG	Exact match	Rothenburg, Switzerland	11-50	12 contacts →
	Exact match “Wir sind ein unabhängiges Beratungsunternehmen für Umweltfragen.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
20	Bureau D'études Impact SA	Exact match	Martigny, Switzerland	11-50	12 contacts →
	Exact match “Depuis sa création en 1986, le bureau d'études Impact SA a réalisé et coordonné de nombreux dossiers d'impact sur l'environnement.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
21	EK Energiekonzepte AG	Exact match	Zurich, Switzerland	11-50	11 contacts →
	Exact match “Die EK Energiekonzepte AG ist Partner für alle am Bau Beteiligten: Bauherren, Planer und Ausführende.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
22	Ecoscan SA	Exact match	Chavannes, Switzerland	11-50	11 contacts →
	Exact match “ECOSCAN SA est situé à Lausanne et est spécialisée dans les études en environnement.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
23	Dionea SA	Exact match	Lugano, Switzerland	11-50	11 contacts →
	Exact match “Consulenza ambientale \| Pianificazione \| Ingegneria forestale” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
24	Hintermann & Weber AG	Exact match	Reinach, Switzerland	11-50	11 contacts →
	Exact match “Die Hintermann & Weber AG ist eine Umweltberatungsfirma und arbeitet für die öffentliche Hand, private Firmen und weitere Institutionen in der ganzen Schweiz.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
25	Toumi AG	Exact match	Biel, Switzerland	1-10	11 contacts →
	Exact match “Die Firma toumi ag mit Hauptsitz in Biel-Bienne.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “ecological consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 161 ecological consulting firms based in Switzerland

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Ecological consulting firms based in Switzerland at a glance

As of Sep 1, 2026

43.7%Verified-email coverage

3.8%Mobile-number coverage

10.2Average contacts per company

1-10Median size (employees)

6.2%Largest-city concentration · Zurich

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

112

11-50

51-200

201-500

501-1,000

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Switzerland whose business descriptions match “ecological consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 717 professional contacts with verified work emails across the full matched dataset. 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 1, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “ecological consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many ecological consulting firms are there based in Switzerland?

RevenueBase identified 161 company matches for ecological consulting firms associated with Switzerland as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Quantis tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most ecological consulting firms?

Zurich leads with 10 company records, followed by Bern (9) and Geneva (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 717 professional contacts with verified work emails tracked across these 161 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 1, 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.