Company lists · Data verified 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 Verified Aug 28, 2026 475 companies tracked

There are 475 clean energy consulting firms headquartered in Switzerland (RevenueBase, August 2026). RevenueBase 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. Data current as of August 28, 2026.

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 verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Quantis	Lausanne	201-500	332	187
2	Drees & Sommer Switzerland	Zurich	201-500	165	104
3	Fichtner Management Consulting	Dubendorf	51-200	88	4
4	Romande Energie Services SA	Preverenges	501-1,000	85	62
5	Alpha IC Gmbh	Zurich	51-200	58	40
6	Horizonte-Group AG	Luzern	51-200	57	27
7	Renera AG	Basel	51-200	54	33
8	Planeco Gmbh	Arlesheim	51-200	49	32
9	Weinmann-Energies SA	Neuchatel	51-200	47	36
10	Lemon Consult AG	Basel	11-50	36	25
11	Ampere Dynamic	Zurich	11-50	29	9
12	Durena AG	Zurich	11-50	26	16
13	Enastra AG	Zurich	11-50	25	17
14	Suntechnics Fabrisolar AG	Olten	51-200	24	12
15	Resiq AG	Visp	11-50	24	10
16	The Meeco Group	Zug	51-200	23	5
17	Ingenieurbüro IEM AG	Bern	11-50	21	9
18	Green Energy Venture AG	Lyssach	51-200	21	1
19	Anthesis Switzerland	Geneva	51-200	20	13
20	Tera Solar	Thonex	11-50	19	11
21	BHP Brugger And Partners LTD	Zurich	11-50	19	10
22	Guggisberg Kurz AG	Ostermundigen	51-200	18	6
23	Energiebüro AG	Zurich	11-50	16	10
24	Adolf Krebs AG	Grund Bei Gstaad	51-200	16	6
25	Swisselectricity.com SA	Geneve	11-50	15	8

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 28, 2026

1-10Median size (employees)

ZurichLargest hub · 57 HQs

98Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

355

11-50

51-200

201-500

501-1,000

Clean energy consulting firms by metro

Metro	Companies
Clean energy consulting firms in Zurich	57
Clean energy consulting firms in Lausanne	24
Clean energy consulting firms in Geneva	15
Clean energy consulting firms in Basel	12
Clean energy consulting firms in Zug	10
Clean energy consulting firms in Bern	10
Clean energy consulting firms in Geneve	9

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “clean energy consulting firms”, with match quality audited by blind human judging, and headquartered in Switzerland.
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: Contact records re-verify on a rolling cadence; 3 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

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

There are 475 clean energy consulting firms headquartered in Switzerland as of August 2026 (RevenueBase).

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 is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.