Company lists · Data refreshed September 2026

Top 25 Clean energy consultants based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 380 companies tracked

RevenueBase identified 380 clean energy consultants headquartered in Switzerland as of September 2026 and tracks 2,053 professional contacts across them, including 779 with verified work emails. Zurich is the largest hub.

This list covers clean energy 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 16, 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 16, 2026 86% judged on-target in blind review

380Companies

2,053Contacts tracked

779Verified emails

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The 25 largest clean energy consultants based in Switzerland

Ranked by team size

Top 25 of 380 clean energy consultants based in Switzerland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to clean energy 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	Thomaslloyd Group	Partial evidence	Stadtkreis 2, SwitzerlandHQ checked Sep 16, 2026	1,001-5,000	62 contacts →
	Partial evidence “Founded in 2003, ThomasLloyd is a vertically integrated sustainable energy and technology solutions provider, integrating development, investment, operations, and technology on a…” Source: RevenueBase Database · checked Sep 16, 2026
2	Horizonte-Group AG	Partial evidence	Luzern, SwitzerlandHQ checked Sep 16, 2026	51-200	58 contacts →
	Partial evidence “Management Consulting für die Energiewirtschaft Wir gestalten die Energiezukunft – mit innovativen Strategien, digitalen Lösungen und partnerschaftlicher Zusammenarbeit.” Source: RevenueBase Database · checked Sep 16, 2026
3	Renera AG	Partial evidence	Basel, SwitzerlandHQ checked Sep 16, 2026	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 Sep 16, 2026
4	Planeco Gmbh	Partial evidence	Arlesheim, SwitzerlandHQ checked Sep 16, 2026	51-200	50 contacts →
	Partial evidence “Willkommen bei Planeco GmbH – deiner wegweisenden Partnerin für innovative Energielösungen!” Source: RevenueBase Database · checked Sep 16, 2026
5	Weinmann-Energies SA	Partial evidence	Echallens, SwitzerlandHQ checked Sep 16, 2026	51-200	47 contacts →
	Partial evidence “Weinmann-Energies est un bureau d’ingénieurs-conseils EPFL-SIA-SuisseIng.” Source: RevenueBase Database · checked Sep 16, 2026
6	Lemon Consult AG	Partial evidence	Zürich, SwitzerlandHQ checked Sep 16, 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 16, 2026
7	Sustainserv	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 16, 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 16, 2026
8	Ampere Dynamic	Partial evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	11-50	29 contacts →
	Partial evidence “Als Experte für nachhaltige und schlüsselfertige Energielösungen im Industrie & Gewerbesektor denken wir Energie ganzheitlich.” Source: RevenueBase Database · checked Sep 16, 2026
9	Emmar SA	Indirect evidence	Bulle, SwitzerlandHQ checked Sep 16, 2026	1-10	28 contacts →
	Indirect evidence “Emmar SA est un bureau d’ingénieurs spécialisés dans le domaine de l’électricité, des énergies renouvelables ainsi que des nouvelles technologies.” Source: RevenueBase Database · checked Sep 16, 2026
10	AZ Ingénieurs SA	Indirect evidence	Lausanne 10, SwitzerlandHQ checked Sep 16, 2026	11-50	27 contacts →
	Indirect evidence “La marque az ingénieurs regroupe des sociétés privées réunissant des ingénieurs-conseils dans les domaines de l'énergie, de la sécurité et des installations techniques pour le…” Source: RevenueBase Database · checked Sep 16, 2026
11	Enastra AG	Partial evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	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 Sep 16, 2026
12	Weisskopf Partner Gmbh	Partial evidence	Zürich, SwitzerlandHQ checked Sep 16, 2026	11-50	25 contacts →
	Partial evidence “Die Steigerung von Energieeffizienz und den Einsatz von erneuerbaren Energien verfolgen wir mit Herzblut.” Source: RevenueBase Database · checked Sep 16, 2026
13	Resiq AG	Indirect evidence	Burgdorf, SwitzerlandHQ checked Sep 16, 2026	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 Sep 16, 2026
14	The Meeco Group	Strong evidence	Zug, SwitzerlandHQ checked Sep 16, 2026	51-200	24 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 Sep 16, 2026
15	Anthesis Switzerland	Indirect evidence	Geneva, SwitzerlandHQ checked Sep 16, 2026	51-200	21 contacts →
	Indirect evidence “Anthesis is the sustainability activator.” Source: RevenueBase Database · checked Sep 16, 2026
16	Ingenieurbüro IEM AG	Partial evidence	Thun, SwitzerlandHQ checked Sep 16, 2026	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 Sep 16, 2026
17	Carbotech AG	Indirect evidence	Basel, SwitzerlandHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Carbotech Inc.” Source: RevenueBase Database · checked Sep 16, 2026
18	Green Energy Venture AG	Partial evidence	Lyssach, SwitzerlandHQ checked Sep 16, 2026	51-200	20 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 Sep 16, 2026
19	SB Technique SA	Indirect evidence	Genève, SwitzerlandHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect evidence “SB technique est un bureau d'Ingénieur Conseil en chauffage, ventilation, climatisation et sécurité du bâtiment développant des concepts énergétiques ambitieux pour des…” Source: RevenueBase Database · checked Sep 16, 2026
20	Guggisberg Kurz AG	Indirect evidence	Ostermundigen, SwitzerlandHQ checked Sep 16, 2026	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 Sep 16, 2026
21	HMB Partners AG	Strong evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	11-50	16 contacts →
	Strong evidence “We are a company with core competencies in project development, project management and consultancy in the fields of buildings, spaces and energy.” Source: RevenueBase Database · checked Sep 16, 2026
22	Pac'info SA	Indirect evidence	Bex, SwitzerlandHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “PAC’info SA est une entreprise active dans le secteur de l’énergie et de l’environnement.” Source: RevenueBase Database · checked Sep 16, 2026
23	Energiebüro AG	Partial evidence	Zurich, SwitzerlandHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “energiebüro ist das Kompetenzzentrum für Solar- und Wasserkraft, Energieeffizienz und Gebäudesysteme.” Source: RevenueBase Database · checked Sep 16, 2026
24	Tera Solar	Indirect evidence	Thônex, SwitzerlandHQ checked Sep 16, 2026	11-50	16 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 Sep 16, 2026
25	Fankhauser Solar AG	Indirect evidence	Solothurn, SwitzerlandHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “Bei Fankhauser Solar AG geniessen Sie einen Rund-um-Service.” Source: RevenueBase Database · checked Sep 16, 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 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 clean energy consultants.
Partial evidence: Its own public description names part of clean energy consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clean energy 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 380 clean energy consultants based in Switzerland

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Clean energy consultants based in Switzerland at a glance

As of Sep 16, 2026

37.9%Verified-email coverage

5.4Average contacts per company

1-10Median size (employees)

9.7%Largest-city concentration · Zurich

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

271

11-50

51-200

201-500

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 380 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 clean energy 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 “clean energy 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 clean energy 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 clean energy 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, 779 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 16, 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 consultants by metro

Clean energy consultants in Zurich37

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 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 clean energy consultants are there based in Switzerland?

RevenueBase identified 380 clean energy 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?

Thomaslloyd Group, headquartered in Zurich, tops this list with the largest team on record.

Which city has the most clean energy consultants?

Zurich leads with 37 headquartered companies, followed by Lausanne (15) and Geneva (11).

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 779 verified decision-maker contacts tracked across these 380 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 16, 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.