Company lists · Data refreshed 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 Data refreshed Aug 31, 2026 182 companies tracked

RevenueBase identified 182 clean energy consultancy companies headquartered in Austria as of August 2026 and 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. 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

182Companies

1,477Contacts tracked

584Verified emails

22Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

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 refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to clean energy consultancy companies: 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	ILF Consulting Engineers In Austria	Indirect evidence	Raaba, Austria	501-1,000	265 contacts →
	Indirect evidence “Servus bei ILF!” Source: RevenueBase Database · checked Aug 31, 2026
2	Kommunalkredit Public Consulting Gmbh	Indirect evidence	Wien, Austria	51-200	103 contacts →
	Indirect evidence “Kommunalkredit Public Consulting pursues the goal of making long-term positive contributions to the environment, the economy, and society by managing funding programs and by…” Source: RevenueBase Database · checked Aug 31, 2026
3	CES Clean Energy Solutions	Strong evidence	Vienna, Austria	11-50	47 contacts →
	Strong evidence “CES clean energy solutions is an enginneering consultant company and serves you as competence centre for energy efficiency, renewable energy and sustainable development.” Source: RevenueBase Database · checked Aug 31, 2026
4	Allplan Gmbh	Indirect evidence	St. Polten, Austria	51-200	38 contacts →
	Indirect evidence “ALLPLAN GmbH was founded in Vienna in 1967.” Source: RevenueBase Database · checked Aug 31, 2026
5	Heizma	Strong evidence	Vienna, Austria	51-200	37 contacts →
	Strong evidence “We’re building Austria’s fastest-growing clean energy company, combining technology, process excellence, and hands-on execution to make renewable heating and solar power radically…” Source: RevenueBase Database · checked Aug 31, 2026
6	EEP Energieconsulting Gmbh	Partial evidence	Brunn Am Gebirge, Austria	11-50	25 contacts →
	Partial evidence “EEP Energieconsulting GmbH is a management consulting Company.” Source: RevenueBase Database · checked Aug 31, 2026
7	Posch & Partners Consulting Engineers	Partial evidence	Innsbruck, Austria	11-50	23 contacts →
	Partial evidence “Posch & Partners core competence lies within the vital and overlapping fields of water, energy and environment.” Source: RevenueBase Database · checked Aug 31, 2026
8	Inercomp	Partial evidence	Vienna, Austria	11-50	22 contacts →
	Partial evidence “Inercomp is an independent energy services company with a focus on energy trading.” Source: RevenueBase Database · checked Aug 31, 2026
9	E7 Energy Innovation & Engineering	Partial evidence	Austria	11-50	20 contacts →
	Partial evidence “e7 is a private research and consulting company specialized in the energy efficiency and the renewable energy sector.” Source: RevenueBase Database · checked Aug 31, 2026
10	10hoch4 Energiesysteme	Indirect evidence	Theresienfeld, Austria	51-200	20 contacts →
	Indirect evidence “Projektentwicklung, Beratung, Planung, Umsetzung von PV-Projekten für Gewerbe und Industrie” Source: RevenueBase Database · checked Aug 31, 2026
11	Collective Energy	Partial evidence	Wien, Austria	11-50	15 contacts →
	Partial evidence “The Energy Transformation - Our Vision for the 21st Century!” Source: RevenueBase Database · checked Aug 31, 2026
12	Power Solution	Partial evidence	Wien, Austria	11-50	15 contacts →
	Partial evidence “Mit unserer langjährigen Erfahrung im Energieeinkauf und unserem hohen technischen Know-How begleiten wir unsere Kunden partnerschaftlich und auf Augenhöhe in die Energiezukunft.” Source: RevenueBase Database · checked Aug 31, 2026
13	Sattler Energie Consulting	Partial evidence	Gmunden, Austria	11-50	15 contacts →
	Partial evidence “Als produktunabhängige Komplett-Anbieterin bieten wir unseren Kundinnen seit 1995 innovative und nachhaltige Gesamtlösungen in den Bereichen Energie, Umwelt und Ressourcenschonung.” Source: RevenueBase Database · checked Aug 31, 2026
14	Ifea Institut FÜR Energieausweis Gmbh	Partial evidence	Linz, Austria	11-50	14 contacts →
	Partial evidence “IfEA - Institut für Energieausweis GmbH is a real estate company based out of Böhmerwaldstraße 3, Linz, Austria.” Source: RevenueBase Database · checked Aug 31, 2026
15	Pulswerk Gmbh	Indirect evidence	Wien, Austria	11-50	13 contacts →
	Indirect evidence “pulswerk ist das Beratungsunternehmen des Österreichischen Ökologie-Instituts.” Source: RevenueBase Database · checked Aug 31, 2026
16	One2zero	Indirect evidence	Salzburg, Austria	11-50	13 contacts →
	Indirect evidence “Vor dem Hintergrund aktueller klimatischer Prozesse, neuer gesetzlicher Rahmenbedingungen und hoher Kosten wird Dekarbonisierung zu einem der wichtigsten Themen in der…” Source: RevenueBase Database · checked Aug 31, 2026
17	GK Consulting Gmbh	Indirect evidence	Hagenberg Im Muhlkreis, Austria	11-50	12 contacts →
	Indirect evidence “Förderungen Im kaum überschaubaren Förderungsdschungel behalten wir den Durchblick.” Source: RevenueBase Database · checked Aug 31, 2026
18	TBH Ingenieur Gmbh	Partial evidence	Graz, Austria	1,001-5,000	12 contacts →
	Partial evidence “Die TBH Ingenieur GmbH ist IHR kompetenter Partner für ganzheitliche Lösungen, die Ihr Gebäude und energietechnischen Anlagen energieeffizienter und nachhaltiger machen.” Source: RevenueBase Database · checked Aug 31, 2026
19	Myssion Consulting Gmbh	Indirect evidence	Wien, Austria	11-50	11 contacts →
	Indirect evidence “Jeder Vision liegt ein WOFÜR zugrunde.” Source: RevenueBase Database · checked Aug 31, 2026
20	Synecotec	Strong evidence	Absam, Austria	11-50	11 contacts →
	Strong evidence “We are an Energy Service Company (ESCO) from Tyrol that has set itself the task of realising clean and sustainable solutions for the energy use of companies and private households.” Source: RevenueBase Database · checked Aug 31, 2026
21	Conversio Energie Gmbh	Partial evidence	Spittal An Der Drau, Austria	201-500	11 contacts →
	Partial evidence “Conversio Energie GmbH is a chemicals company based out of Koschatstraße 24, Spittal an der Drau, Austria.” Source: RevenueBase Database · checked Aug 31, 2026
22	Lechner Partner Ingenieure Gmbh	Indirect evidence	Penzendorf, Austria	11-50	10 contacts →
	Indirect evidence “Die Firma Lechner + Partner Ingenieure bietet als befugtes Ingenieurbüro nicht nur Planungs- und Überwachungsleistungen an sondern versteht sich als technischer Dienstleister…” Source: RevenueBase Database · checked Aug 31, 2026
23	Voltares	Partial evidence	Wien, Austria	11-50	10 contacts →
	Partial evidence “Voltares is an independent renewable energy developer focused on utility-scale and distributed assets in emerging markets.” Source: RevenueBase Database · checked Aug 31, 2026
24	Energiewerkstatt	Partial evidence	Lengau, Austria	11-50	10 contacts →
	Partial evidence “We are a growing technical office for renewable energy located in Friedburg /Upper Austria.” Source: RevenueBase Database · checked Aug 31, 2026
25	Brainbows	Partial evidence	Wien, Austria	11-50	9 contacts →
	Partial evidence “Wir sind ein Beratungsunternehmen für Nachhaltigkeit, Energie & Klimaschutz mit Sitz in Wien.” 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 consultancy companies. 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 consultancy companies.
Partial evidence: Its own public description names part of clean energy consultancy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clean energy consultancy companies. 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 182 clean energy consultancy companies based in Austria

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 584 reachable decision-makers.

Free signup · no credit card

View the full list →

Clean energy consultancy companies based in Austria at a glance

As of Aug 31, 2026

39.5%Verified-email coverage

1.5%Mobile-number coverage

8.1Average contacts per company

1-10Median size (employees)

17.0%Largest-city concentration · Wien

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

105

11-50

51-200

201-500

501-1,000

1,001-5,000

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 consultancy companies, 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 Austria whose own description of what they do matches “clean energy consultancy companies”. 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 consultancy companies), 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 consultancy companies, and records with no verified work email. Companies headquartered outside Austria 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, 584 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 consultancy companies by metro

Clean energy consultancy companies in Wien31

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 consultancy companies, 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 consultancy companies are there based in Austria?

RevenueBase identified 182 clean energy consultancy companies headquartered in Austria 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?

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 refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 2026.

Ready to reach these companies? Verified emails and direct dials for all 182 clean energy consultancy companies based in Austria. Start with a free account, no credit card.

Download this list →

Related lists

Clean energy consultancy companies by geography

Browse the directory

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.