Company lists · Data refreshed August 2026

Top 25 Clean energy consulting firms based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 475 companies tracked

RevenueBase identified 475 clean energy consulting firms headquartered in Switzerland as of August 2026 and tracks 2,882 professional contacts across them, including 1,157 with verified work emails and 98 with mobile numbers. Zurich is the largest hub.

This list covers clean energy 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 August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

475Companies

2,882Contacts tracked

1,157Verified emails

98Mobile numbers

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The 25 largest clean energy consulting firms based in Switzerland

Ranked by team size

Top 25 of 475 clean energy consulting firms based in Switzerland, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to clean energy consulting firms: 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	Quantis	Partial evidence	Lausanne, Switzerland	201-500	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 Aug 31, 2026
2	Drees & Sommer Switzerland	Partial evidence	Zurich, Switzerland	201-500	165 contacts →
	Partial 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 Aug 31, 2026
3	Fichtner Management Consulting	Partial evidence	Dubendorf, Switzerland	51-200	88 contacts →
	Partial evidence “Transformation, strategy, management and economics – FMC advises companies and investors in the energy and water industry and related sectors.” Source: RevenueBase Database · checked Aug 31, 2026
4	Romande Energie Services SA	Partial evidence	Preverenges, Switzerland	501-1,000	85 contacts →
	Partial evidence “Experts dans le domaine des services énergétiques et de la décarbonisation, les 500 collaborateurs de Romande Energie Services SA, société du Groupe Romande Energie, sont à votre…” Source: RevenueBase Database · checked Aug 31, 2026
5	Alpha IC Gmbh	Partial evidence	Zurich, Switzerland	51-200	58 contacts →
	Partial evidence “Die Alpha IC ist ein inhabergeführtes Consultingbüro für das Real Estate Management.” Source: RevenueBase Database · checked Aug 31, 2026
6	Horizonte-Group AG	Strong evidence	Luzern, Switzerland	51-200	57 contacts →
	Strong evidence “Management Consulting für die Energiewirtschaft Wir gestalten die Energiezukunft – mit innovativen Strategien, digitalen Lösungen und partnerschaftlicher Zusammenarbeit.” Source: RevenueBase Database · checked Aug 31, 2026
7	Renera AG	Partial evidence	Basel, Switzerland	51-200	54 contacts →
	Partial evidence “Renera AG (formerly Energie Zukunft Schweiz AG) is a leading force on the road to a fully renewable energy world.” Source: RevenueBase Database · checked Aug 31, 2026
8	Planeco Gmbh	Partial evidence	Arlesheim, Switzerland	51-200	49 contacts →
	Partial evidence “Willkommen bei Planeco GmbH – deiner wegweisenden Partnerin für innovative Energielösungen!” Source: RevenueBase Database · checked Aug 31, 2026
9	Weinmann-Energies SA	Partial evidence	Neuchatel, Switzerland	51-200	47 contacts →
	Partial evidence “Weinmann-Energies est un bureau d’ingénieurs-conseils EPFL-SIA-SuisseIng.” Source: RevenueBase Database · checked Aug 31, 2026
10	Lemon Consult AG	Strong evidence	Basel, Switzerland	11-50	36 contacts →
	Strong 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 Aug 31, 2026
11	Ampere Dynamic	Partial evidence	Zurich, Switzerland	11-50	29 contacts →
	Partial evidence “Als Experte für nachhaltige und schlüsselfertige Energielösungen im Industrie & Gewerbesektor denken wir Energie ganzheitlich.” Source: RevenueBase Database · checked Aug 31, 2026
12	Durena AG	Indirect evidence	Zurich, Switzerland	11-50	26 contacts →
	Indirect evidence “Unserem Ingenieurunternehmen ist es ein grosses Anliegen, individuell und persönlich auf Ihre Wünsche einzugehen.” Source: RevenueBase Database · checked Aug 31, 2026
13	Enastra AG	Partial evidence	Zurich, Switzerland	11-50	25 contacts →
	Partial evidence “Das Vernetzen der Fachgebiete Strategie & Konzept, Bauherrentreuhand, Energiecontrolling und Nebenkosten ist das Fundament unserer Kernkompetenz.” Source: RevenueBase Database · checked Aug 31, 2026
14	Suntechnics Fabrisolar AG	Partial evidence	Olten, Switzerland	51-200	24 contacts →
	Partial evidence “Seit über 40 Jahren dreht sich bei SunTechnics Fabrisolar alles um das Thema erneuerbare Energien.” Source: RevenueBase Database · checked Aug 31, 2026
15	Resiq AG	Indirect evidence	Visp, Switzerland	11-50	24 contacts →
	Indirect evidence “RESiQ setzt sich für den erfolgreichen Einsatz von erneuerbaren Ressourcen (RES) ein und ermöglicht durch intelligente technische Lösungen (iQ) deren effiziente und nachhaltige…” Source: RevenueBase Database · checked Aug 31, 2026
16	The Meeco Group	Strong evidence	Zug, Switzerland	51-200	23 contacts →
	Strong evidence “As a leader in clean renewable energy, meeco™ has provided clients with services and solutions for over 423 MW across three continents.” Source: RevenueBase Database · checked Aug 31, 2026
17	Ingenieurbüro IEM AG	Partial evidence	Bern, Switzerland	11-50	21 contacts →
	Partial evidence “Wir sind ein national tätiges, anerkanntes Ingenieurbüro für Energie- und Gebäudetechnikplanungen, führend in unseren Kompetenzen und Dienstleistungen.” Source: RevenueBase Database · checked Aug 31, 2026
18	Green Energy Venture AG	Partial evidence	Lyssach, Switzerland	51-200	21 contacts →
	Partial evidence “Green Energy Venture is a leading advisory and services firm which operates along the value chain of renewable energies.” Source: RevenueBase Database · checked Aug 31, 2026
19	Anthesis Switzerland	Indirect evidence	Geneva, Switzerland	51-200	20 contacts →
	Indirect evidence “Anthesis is the sustainability activator.” Source: RevenueBase Database · checked Aug 31, 2026
20	Tera Solar	Indirect evidence	Thonex, Switzerland	11-50	19 contacts →
	Indirect evidence “tera solar a pour mission d’accompagner particuliers et entreprises dans leurs projets de centrales photovoltaïques et autres infrastructures énergétiques en proposant des…” Source: RevenueBase Database · checked Aug 31, 2026
21	BHP Brugger And Partners LTD	Indirect evidence	Zurich, Switzerland	11-50	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 Aug 31, 2026
22	Guggisberg Kurz AG	Indirect evidence	Ostermundigen, Switzerland	51-200	18 contacts →
	Indirect evidence “Mit über 90 erfahrene Mitarbeitenden ist die Guggisberg Kurz AG in der Lage sowohl grosse Objekte auszuführen, als auch sehr flexibel zu agieren.” Source: RevenueBase Database · checked Aug 31, 2026
23	Energiebüro AG	Partial evidence	Zurich, Switzerland	11-50	16 contacts →
	Partial evidence “energiebüro ist das Kompetenzzentrum für Solar- und Wasserkraft, Energieeffizienz und Gebäudesysteme.” Source: RevenueBase Database · checked Aug 31, 2026
24	Adolf Krebs AG	Partial evidence	Grund Bei Gstaad, Switzerland	51-200	16 contacts →
	Partial evidence “Aber ebenso viel mit harten Kalkulationen, Energiemanagement, mit Wissen, was zu tun ist.” Source: RevenueBase Database · checked Aug 31, 2026
25	Swisselectricity.com SA	Partial evidence	Geneve, Switzerland	11-50	15 contacts →
	Partial evidence “SwissElectricity has been negotiating energy purchasing conditions and grid connection costs on the Swiss and European markets since 1998.” Source: RevenueBase Database · checked Aug 31, 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: clean energy 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 clean energy consulting firms.
Partial evidence: Its own public description names part of clean energy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clean energy 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 475 clean energy consulting firms based in Switzerland

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Clean energy consulting firms based in Switzerland at a glance

As of Aug 31, 2026

40.1%Verified-email coverage

3.4%Mobile-number coverage

6.1Average contacts per company

1-10Median size (employees)

12.0%Largest-city concentration · Zurich

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

355

11-50

51-200

201-500

501-1,000

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 clean energy 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 “clean energy 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 clean energy 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 clean energy 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, 1,157 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 August 31, 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.

Clean energy consulting firms by metro

Clean energy consulting firms in Zurich57

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 clean energy 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 clean energy consulting firms are there based in Switzerland?

RevenueBase identified 475 clean energy consulting firms headquartered in Switzerland as of August 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 clean energy consulting firms?

Zurich leads with 57 headquartered companies, followed by Lausanne (24) and Geneva (15).

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 1,157 verified decision-maker contacts tracked across these 475 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.