Company lists · Data refreshed September 2026
Top 25 Esg consulting firms based in Switzerland
RevenueBase identified 293 esg consulting firms headquartered in Switzerland as of September 2026 and 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 2, 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.
The 25 largest esg consulting firms based in Switzerland
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 332 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 2, 2026Thanks. The Data Team will review it. | |||||
| 2 | 214 contacts → | ||||
Indirect evidence “For over 20 years, we have been taking care of our clients, ensuring the achievement of business objectives by improving performance, organization, and processes.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 3 | 61 contacts → | ||||
Partial evidence “INFRAS has been doing research and consulting focused on sustainable development since 1976.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 4 | 58 contacts → | ||||
Partial evidence “Die Alpha IC ist ein inhabergeführtes Consultingbüro für das Real Estate Management.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 5 | 31 contacts → | ||||
Indirect evidence “Nous accompagnons les acteurs de la construction et de l’immobilier dans la gestion des polluants, la sécurité et la préservation de l’environnement.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 6 | 29 contacts → | ||||
Indirect evidence “Neosys AG: At your side with all the tools of sustainability!” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 7 | 23 contacts → | ||||
Indirect evidence “VEMA CARBON is a practical expert in climate solutions.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 8 | 21 contacts → | ||||
Indirect evidence “Carbotech Inc.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 9 | 20 contacts → | ||||
Indirect evidence “Anthesis is the sustainability activator.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 10 | 19 contacts → | ||||
Indirect evidence “For more than a quarter century, we have advised and supported our clients in the private sector, the public sector, and throughout society in the fields of Corporate Social…” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 11 | 18 contacts → | ||||
Indirect evidence “Seit über 130 Jahren wächst WSP kontinuierlich und ist heute auf der ganzen Welt vertreten.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 12 | 16 contacts → | ||||
Indirect evidence “Blossom et partenaires is a consultancy firm specializing in sustainability and responsible communication.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 13 | 12 contacts → | ||||
Indirect evidence “Wir sind ein unabhängiges Beratungsunternehmen für Umweltfragen.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 14 | 12 contacts → | ||||
Indirect evidence “Depuis sa création en 1986, le bureau d'études Impact SA a réalisé et coordonné de nombreux dossiers d'impact sur l'environnement.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 15 | 10 contacts → | ||||
Indirect evidence “oekoskop AG is a environmental consultancy based in Basel, Switzerland.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 16 | 8 contacts → | ||||
Indirect evidence “Ökologie und Ökonomie Wir fühlen uns dem nachhaltigen Umgang mit den Ressourcen verpflichtet.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 17 | 7 contacts → | ||||
Indirect evidence “Welcome to Black Tree Energy Group At Black Tree Energy Group, we specialize in providing tailored services in energy transition and sustainable infrastructure development.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 18 | 6 contacts → | ||||
Indirect evidence “With decades of combined industry experience in Europe, Central Asia, CIS, Africa, and the Middle East, the Energies Group founding team knows what it takes to help you develop…” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 contacts → | ||||
Indirect evidence “2Comply Sagl was founded in 2020 in Switzerland as an external partner for financial institutions and other companies with the aim to provide them an expert view in risk…” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Indirect evidence “Nachhaltigkeit im Griff - mit der soRec Gruppe Ökologische Auflagen, neue Gesetze, steigende Anforderungen: Das Thema Nachhaltigkeit kann überwältigend wirken.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 contacts → | ||||
Partial evidence “Gum Consulting si pone come consulente in ambito di corporate governance, analizzando la situazione in cui versa l’azienda e ricostruendo il quadro di riferimento per la…” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 contacts → | ||||
Indirect evidence “Après avoir dirigé la société Trianon SA pendant plus de 20 ans (administration ressources humaines pour sociétés de grande taille), nous avons terminé avec succès notre mission…” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 23 | 4 contacts → | ||||
Partial evidence “E2 Management Consulting AG develops and supports the environmental and sustainability management of companies, NGOs and other organisations across sectors.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 contacts → | ||||
Indirect evidence “Nous vous accompagnons dans les trois domaines énergie-durabilité-climat: Energie : l'optimisation de vos coûts énergétiques et un accompagnement dans vos choix de votre…” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 contacts → | ||||
Indirect evidence “At cloud37, we're passionate about enabling businesses to thrive in the digital age.” Source: RevenueBase Database · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
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: esg consulting firms. 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 esg consulting firms.
- Partial evidence
- Its own public description names part of esg consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name esg consulting firms. 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 293 esg consulting firms based in Switzerland
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Esg consulting firms based in Switzerland at a glance
As of Sep 2, 2026Companies by employee count
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 esg consulting firms, 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 “esg consulting firms”. 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 esg consulting firms), 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 esg consulting 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 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, 699 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 2, 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.
Esg consulting firms by metro
- Esg consulting firms in Zurich52
- Esg consulting firms in Geneva30
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 esg consulting firms, 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 esg consulting firms are there based in Switzerland?
RevenueBase identified 293 esg consulting 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?
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 refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 2, 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.