Company lists · Data verified August 2026

Top 25 Clean energy consultancy companies based in Austria

Name: Clean energy consultancy companies based in Austria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 182 companies tracked

There are 182 clean energy consultancy companies headquartered in Austria (RevenueBase, August 2026). RevenueBase tracks 1,477 professional contacts across them, including 584 with verified work emails and 22 with mobile numbers. Wien is the largest hub.

This list covers clean energy consultancy companies headquartered in Austria, 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.

182Companies

1,477Contacts tracked

584Verified emails

22Mobile numbers

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The 25 largest clean energy consultancy companies based in Austria

Ranked by team size

Top 25 of 182 clean energy consultancy companies based in Austria, 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	ILF Consulting Engineers In Austria	Raaba	501-1,000	265	158
2	Kommunalkredit Public Consulting Gmbh	Wien	51-200	103	41
3	CES Clean Energy Solutions	Vienna	11-50	47	29
4	Allplan Gmbh	St. Polten	51-200	38	23
5	Heizma	Vienna	51-200	37	25
6	EEP Energieconsulting Gmbh	Brunn Am Gebirge	11-50	25	17
7	Posch & Partners Consulting Engineers	Innsbruck	11-50	23	6
8	Inercomp	Vienna	11-50	22	18
9	E7 Energy Innovation & Engineering	n/a	11-50	20	17
10	10hoch4 Energiesysteme	Theresienfeld	51-200	20	8
11	Collective Energy	Wien	11-50	15	8
12	Power Solution	Wien	11-50	15	7
13	Sattler Energie Consulting	Gmunden	11-50	15	4
14	Ifea Institut FÜR Energieausweis Gmbh	Linz	11-50	14	5
15	Pulswerk Gmbh	Wien	11-50	13	8
16	One2zero	Salzburg	11-50	13	3
17	GK Consulting Gmbh	Hagenberg Im Muhlkreis	11-50	12	9
18	TBH Ingenieur Gmbh	Graz	1,001-5,000	12	3
19	Myssion Consulting Gmbh	Wien	11-50	11	6
20	Synecotec	Absam	11-50	11	6
21	Conversio Energie Gmbh	Spittal An Der Drau	201-500	11	2
22	Lechner Partner Ingenieure Gmbh	Penzendorf	11-50	10	9
23	Voltares	Wien	11-50	10	5
24	Energiewerkstatt	Lengau	11-50	10	4
25	Brainbows	Wien	11-50	9	5

Showing 25 of 182 clean energy consultancy companies based in Austria

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Clean energy consultancy companies based in Austria at a glance

As of Aug 28, 2026

1-10Median size (employees)

WienLargest hub · 31 HQs

22Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

105

11-50

51-200

201-500

501-1,000

1,001-5,000

Clean energy consultancy companies by metro

Metro	Companies
Clean energy consultancy companies in Wien	31
Clean energy consultancy companies in Vienna	20
Clean energy consultancy companies in Graz	10
Clean energy consultancy companies in Linz	7
Clean energy consultancy companies in Innsbruck	7
Clean energy consultancy companies in Absam	3
Clean energy consultancy companies in Klosterneuburg	3

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 consultancy companies”, with match quality audited by blind human judging, and headquartered in Austria.
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 consultancy companies are there based in Austria?

There are 182 clean energy consultancy companies headquartered in Austria as of August 2026 (RevenueBase).

What is the largest company on this list?

ILF Consulting Engineers In Austria, headquartered in Raaba, tops this list with the largest team on record.

Which city has the most clean energy consultancy companies?

Wien leads with 31 headquartered companies, followed by Vienna (20) and Graz (10).

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 584 verified decision-maker contacts tracked across these 182 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.