Company lists · Data refreshed September 2026

Top 25 Energy and sustainability consultants based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 521 companies tracked

RevenueBase identified 521 energy and sustainability consultants headquartered in Switzerland as of September 2026 and tracks 4,341 professional contacts across them, including 1,802 with verified work emails. Zurich is the largest hub.

This list covers energy and 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 21, 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 21, 2026 86% judged on-target in blind review

521Companies

4,341Contacts tracked

1,802Verified emails

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The 25 largest energy and sustainability consultants based in Switzerland

Ranked by team size

Top 25 of 521 energy and sustainability consultants based in Switzerland, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to energy and 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	BKW AG	Partial evidence	Bern, SwitzerlandHQ checked Sep 21, 2026	10001+	1,148 contacts →
	Partial evidence “The BKW Group is an internationally active energy and infrastructure company based in Berne.” Source: RevenueBase Database · checked Sep 21, 2026
2	Quantis	Partial evidence	Lausanne, SwitzerlandHQ checked Sep 21, 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 21, 2026
3	Horizonte-Group AG	Partial evidence	Luzern, SwitzerlandHQ checked Sep 21, 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 21, 2026
4	Renera AG	Partial evidence	Basel, SwitzerlandHQ checked Sep 21, 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 21, 2026
5	Weinmann-Energies SA	Partial evidence	Echallens, SwitzerlandHQ checked Sep 21, 2026	51-200	47 contacts →
	Partial evidence “Weinmann-Energies est un bureau d’ingénieurs-conseils EPFL-SIA-SuisseIng.” Source: RevenueBase Database · checked Sep 21, 2026
6	Anex Ingenieure AG	Partial evidence	Zürich, SwitzerlandHQ checked Sep 21, 2026	51-200	40 contacts →
	Partial 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 21, 2026
7	Lemon Consult AG	Strong evidence	Zürich, SwitzerlandHQ checked Sep 21, 2026	11-50	37 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 Sep 21, 2026
8	Swiss Climate	Partial evidence	Bern, SwitzerlandHQ checked Sep 21, 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 21, 2026
9	Sustainserv	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 21, 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 21, 2026
10	Caeli Ingénierie	Partial evidence	Carouge, SwitzerlandHQ checked Sep 21, 2026	11-50	33 contacts →
	Partial evidence “Bureau d'études CVCSE, Energie, Automatisme du bâtiment, MCR, Physique du bâtiment.” Source: RevenueBase Database · checked Sep 21, 2026
11	SSE Engineering AG	Partial evidence	Ostermundigen, SwitzerlandHQ checked Sep 21, 2026	11-50	31 contacts →
	Partial evidence “Wir bieten Bauherren und Architekten Beratung und Planung für professionelle Lösungen in Energie und Automation.” Source: RevenueBase Database · checked Sep 21, 2026
12	Ompex AG	Partial evidence	Zurich, SwitzerlandHQ checked Sep 21, 2026	11-50	30 contacts →
	Partial evidence “Ompex ist Ihr Energiedienstleister, Ihr Energieexperte und Ihr Energiewegbereiter.” Source: RevenueBase Database · checked Sep 21, 2026
13	Waldhauser Hermann AG	Indirect evidence	Münchenstein, SwitzerlandHQ checked Sep 21, 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 21, 2026
14	Ampere Dynamic	Partial evidence	Zurich, SwitzerlandHQ checked Sep 21, 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 21, 2026
15	BG Consulting Engineers	Indirect evidence	Lausanne, SwitzerlandHQ checked Sep 21, 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 21, 2026
16	Durena AG	Indirect evidence	Lenzburg, SwitzerlandHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “Unserem Ingenieurunternehmen ist es ein grosses Anliegen, individuell und persönlich auf Ihre Wünsche einzugehen.” Source: RevenueBase Database · checked Sep 21, 2026
17	Enastra AG	Partial evidence	Zurich, SwitzerlandHQ checked Sep 21, 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 21, 2026
18	Weisskopf Partner Gmbh	Partial evidence	Zürich, SwitzerlandHQ checked Sep 21, 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 21, 2026
19	The Advisory House	Partial evidence	Zug, SwitzerlandHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “The Advisory House specializes in the European energy industry with offices in Germany, Austria and Switzerland.” Source: RevenueBase Database · checked Sep 21, 2026
20	Resiq AG	Indirect evidence	Burgdorf, SwitzerlandHQ checked Sep 21, 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 21, 2026
21	The Meeco Group	Partial evidence	Zug, SwitzerlandHQ checked Sep 21, 2026	51-200	24 contacts →
	Partial 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 21, 2026
22	Gimelli Engineering AG	Indirect evidence	Zollikofen, SwitzerlandHQ checked Sep 21, 2026	11-50	22 contacts →
	Indirect evidence “We’re a purpose-driving and future-oriented engineering company based in the greater Berne area.” Source: RevenueBase Database · checked Sep 21, 2026
23	ID GO Management SA	Indirect evidence	Morges, SwitzerlandHQ checked Sep 21, 2026	11-50	22 contacts →
	Indirect evidence “ID GO Management SA est une société de services, alliant des compétences uniques à la croisée de l’énergie, la physique du bâtiment et l’architecture pour mettre en œuvre la…” Source: RevenueBase Database · checked Sep 21, 2026
24	Anthesis Switzerland	Partial evidence	Geneva, SwitzerlandHQ checked Sep 21, 2026	51-200	21 contacts →
	Partial evidence “Anthesis is the sustainability activator.” Source: RevenueBase Database · checked Sep 21, 2026
25	Ingenieurbüro IEM AG	Partial evidence	Thun, SwitzerlandHQ checked Sep 21, 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 21, 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: energy and 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 energy and sustainability consultants.
Partial evidence: Its own public description names part of energy and sustainability consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy and 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 521 energy and sustainability consultants based in Switzerland

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Energy and sustainability consultants based in Switzerland at a glance

As of Sep 21, 2026

41.5%Verified-email coverage

8.3Average contacts per company

1-10Median size (employees)

9.8%Largest-city concentration · Zurich

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

376

11-50

111

51-200

201-500

501-1,000

10001+

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 521 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 energy and 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 “energy and 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 energy and 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 energy and 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, 1,802 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 21, 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.

Energy and sustainability consultants by metro

Energy and sustainability consultants in Zurich51

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 energy and 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 energy and sustainability consultants are there based in Switzerland?

RevenueBase identified 521 energy and 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?

BKW AG, headquartered in Bern, tops this list with the largest team on record.

Which city has the most energy and sustainability consultants?

Zurich leads with 51 headquartered companies, followed by Lausanne (24) and Basel (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 1,802 verified decision-maker contacts tracked across these 521 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 21, 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.