Company lists · Data refreshed September 2026

Top 25 City sustainability consultants based in Switzerland

Name: City sustainability consultants based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 368 companies tracked

RevenueBase identified 368 city sustainability consultants headquartered in Switzerland as of September 2026 and tracks 5,588 professional contacts across them, including 2,576 with verified work emails. Zurich is the largest hub.

This list covers city sustainability consultants 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 19, 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 19, 2026 86% judged on-target in blind review

368Companies

5,588Contacts tracked

2,576Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest city sustainability consultants based in Switzerland

Ranked by team size

Top 25 of 368 city sustainability consultants based in Switzerland, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to city sustainability consultants: 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	Amstein Walthert	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 19, 2026	1,001-5,000	563 contacts →
	Indirect evidence “Ü Ingenieurskunst bedeutet, mit Ressourcen richtig umzugehen.” Source: RevenueBase Database · checked Sep 19, 2026
2	EBP Schweiz	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 19, 2026	201-500	374 contacts →
	Indirect evidence “As an international consulting and engineering company, we stand out by our combined excellence to deliver forward-thinking solutions for our clients' most complex challenges.” Source: RevenueBase Database · checked Sep 19, 2026
3	Quantis	Partial evidence	Lausanne, SwitzerlandHQ checked Sep 19, 2026	201-500	325 contacts →
	Partial evidence “Quantis, part of BCG, is a sustainability consulting firm that helps organizations translate sustainability ambition into measurable business value.” Source: RevenueBase Database · checked Sep 19, 2026
4	Holinger	Indirect evidence	Liestal, SwitzerlandHQ checked Sep 19, 2026	501-1,000	265 contacts →
	Indirect evidence “For over 90 years, HOLINGER has been solving engineering and scientific tasks in various specialist areas related to the water cycle.” Source: RevenueBase Database · checked Sep 19, 2026
5	Rapp AG	Indirect evidence	Basel, SwitzerlandHQ checked Sep 19, 2026	201-500	210 contacts →
	Indirect evidence “Unsere Welt ist im Wandel.” Source: RevenueBase Database · checked Sep 19, 2026
6	Drees & Sommer Switzerland	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 19, 2026	201-500	164 contacts →
	Indirect evidence “Drees & Sommer Switzerland is a consulting company providing a single source of consultation and implementation services for the real estate, infrastructure and industrial markets.” Source: RevenueBase Database · checked Sep 19, 2026
7	Jauslin Stebler AG	Indirect evidence	Muttenz, SwitzerlandHQ checked Sep 19, 2026	51-200	108 contacts →
	Indirect evidence “Die komplexen Rahmenbedingungen erfordern eine ganzheitliche Sicht der Probleme, kreative Prozesse und eine entsprechend eingespielte Organisation.” Source: RevenueBase Database · checked Sep 19, 2026
8	Metron AG	Indirect evidence	Brugg, SwitzerlandHQ checked Sep 19, 2026	51-200	81 contacts →
	Indirect evidence “Metron ist ein unabhängiges Architektur- und Planungsbüro in den Bereichen Raumentwicklung, Landschafts- und Verkehrsplanung, Freiraumgestaltung, Städtebau und Architektur.” Source: RevenueBase Database · checked Sep 19, 2026
9	Infras	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 19, 2026	51-200	60 contacts →
	Indirect evidence “INFRAS has been doing research and consulting focused on sustainable development since 1976.” Source: RevenueBase Database · checked Sep 19, 2026
10	Weinmann-Energies SA	Indirect evidence	Echallens, SwitzerlandHQ checked Sep 19, 2026	51-200	47 contacts →
	Indirect evidence “Weinmann-Energies est un bureau d’ingénieurs-conseils EPFL-SIA-SuisseIng.” Source: RevenueBase Database · checked Sep 19, 2026
11	BSB Partner Ingenieure UND Planer AG	Indirect evidence	Biberist, SwitzerlandHQ checked Sep 19, 2026	51-200	42 contacts →
	Indirect evidence “Seit 1942 leistet BSB + Partner relevante Beiträge zu einer nachhaltigen Entwicklung und trägt dazu bei, die Zukunft umsichtig und mit langfristigem Blick zu formen.” Source: RevenueBase Database · checked Sep 19, 2026
12	Anex Ingenieure AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 19, 2026	51-200	40 contacts →
	Indirect evidence “Anex Ingenieure ist ein Beratungs- und Planungsunternehmen für Gebäudetechnik, das ressourcenschonende Energie- und Medienkonzepte für Prozesse, Gebäude und Areale entwickelt.” Source: RevenueBase Database · checked Sep 19, 2026
13	Ecosens AG	Indirect evidence	Wallisellen, SwitzerlandHQ checked Sep 19, 2026	51-200	40 contacts →
	Indirect evidence “Langjährige Erfahrung und Nähe zu aktuellen Entwicklungen in sämtlichen umweltrelevanten Fragestellungen machen Ecosens zum führenden Beratungsunternehmen.” Source: RevenueBase Database · checked Sep 19, 2026
14	Kontextplan AG	Indirect evidence	Bern, SwitzerlandHQ checked Sep 19, 2026	51-200	39 contacts →
	Indirect evidence “Seit der Gründung von Kontextplan 2008 engagieren wir uns für Lebensräume mit Qualität in Städten und Gemeinden.” Source: RevenueBase Database · checked Sep 19, 2026
15	Inser SA	Indirect evidence	Le Mont-sur-lausanne, SwitzerlandHQ checked Sep 19, 2026	11-50	38 contacts →
	Indirect evidence “Les hommes.” Source: RevenueBase Database · checked Sep 19, 2026
16	Lemon Consult AG	Partial evidence	Zürich, SwitzerlandHQ checked Sep 19, 2026	11-50	37 contacts →
	Partial evidence “Lemon Consult is a specialized engineering and consulting office for energy efficiency, sustainability and renewable energies in the area of building and technical systems.” Source: RevenueBase Database · checked Sep 19, 2026
17	Swiss Climate	Partial evidence	Bern, SwitzerlandHQ checked Sep 19, 2026	11-50	35 contacts →
	Partial evidence “We advise companies and organisations in setting up holistic climate strategies and sustainability concepts.” Source: RevenueBase Database · checked Sep 19, 2026
18	Sustainserv	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 19, 2026	11-50	34 contacts →
	Indirect evidence “Everything we do is designed to inspire meaningful change in the world every day.” Source: RevenueBase Database · checked Sep 19, 2026
19	Planteam S AG	Indirect evidence	Luzern, SwitzerlandHQ checked Sep 19, 2026	11-50	34 contacts →
	Indirect evidence “Plan:team ist ein interdisziplinäres Raumentwicklungsböro.” Source: RevenueBase Database · checked Sep 19, 2026
20	Kontur Projektmanagement AG	Indirect evidence	Bern, SwitzerlandHQ checked Sep 19, 2026	11-50	32 contacts →
	Indirect evidence “Wir sind ein in Bern verankertes Beratungsbüro und schweizweit tätig.” Source: RevenueBase Database · checked Sep 19, 2026
21	Waldhauser Hermann AG	Indirect evidence	Münchenstein, SwitzerlandHQ checked Sep 19, 2026	51-200	30 contacts →
	Indirect evidence “Haustechnik ist eine komplexe Angelegenheit und steht in direktem Zusammenhang mit Benutzerzufriedenheit, Betriebssicherheit, Erstellungs- und Betriebskosten sowie Umweltbelastung.” Source: RevenueBase Database · checked Sep 19, 2026
22	Ryser Ingenieure AG	Indirect evidence	Bern, SwitzerlandHQ checked Sep 19, 2026	11-50	28 contacts →
	Indirect evidence “Wir sind eine eigenständige Ingenieurunternehmung für Planung, Beratung und Realisierung mit Schwergewicht im Siedlungswasserbau.” Source: RevenueBase Database · checked Sep 19, 2026
23	Helbling Beratung Bauplanung	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 19, 2026	501-1,000	28 contacts →
	Indirect evidence “Helbling Beratung + Bauplanung AG Wir führen komplexe Immobilien, Industrie- und Infrastrukturprojekte zum Erfolg.” Source: RevenueBase Database · checked Sep 19, 2026
24	BG Consulting Engineers	Indirect evidence	Lausanne, SwitzerlandHQ checked Sep 19, 2026	501-1,000	28 contacts →
	Indirect evidence “Recognised for its expertise in prestigious projects such as the Lyon-Turin Base Tunnel, the Grand Paris Express, the Rolex Learning Center in Lausanne, the Institut Curie in…” Source: RevenueBase Database · checked Sep 19, 2026
25	Emch Berger WSB AG	Indirect evidence	Emmenbrücke, SwitzerlandHQ checked Sep 19, 2026	51-200	27 contacts →
	Indirect evidence “Die Emch+Berger WSB AG ist ein Unternehmen der 1953 gegründeten Emch+Berger Gruppe.” Source: RevenueBase Database · checked Sep 19, 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: city sustainability consultants. 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 city sustainability consultants.
Partial evidence: Its own public description names part of city sustainability consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name city sustainability consultants. 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 368 city sustainability consultants based in Switzerland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,576 reachable decision-makers.

Free signup · no credit card

View the full list →

City sustainability consultants based in Switzerland at a glance

As of Sep 19, 2026

46.1%Verified-email coverage

15.2Average contacts per company

1-10Median size (employees)

15.2%Largest-city concentration · Zurich

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

247

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Switzerland, so it is reported there. Company counts and contact totals on this page are exact for Switzerland, over 368 companies.

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 city sustainability consultants, 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 “city sustainability consultants”. 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 city sustainability consultants), 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 city sustainability consultants, 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, 2,576 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 19, 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.

City sustainability consultants by metro

City sustainability consultants in Zurich56

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 city sustainability consultants, 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 city sustainability consultants are there based in Switzerland?

RevenueBase identified 368 city sustainability consultants 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?

Amstein Walthert, headquartered in Zurich, tops this list with the largest team on record.

Which city has the most city sustainability consultants?

Zurich leads with 56 headquartered companies, followed by Lausanne (19) and Bern (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 2,576 verified decision-maker contacts tracked across these 368 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 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 368 city sustainability consultants based in Switzerland. Start with a free account, no credit card.

Download this list →

Related lists

City sustainability consultants by geography

Browse the directory

Browse: Companies home · All Switzerland lists · All City sustainability consultants lists · New lists

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.