Company lists · Data refreshed September 2026
Top 25 Renewable energy consulting firms based in Austria
RevenueBase identified 143 renewable energy consulting firms headquartered in Austria as of September 2026 and tracks 1,212 professional contacts across them, including 613 with verified work emails and 20 with mobile numbers. Wien is the largest hub.
This list covers renewable energy consulting firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.
The 25 largest renewable energy consulting firms based in Austria
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 268 | ||||
“Servus bei ILF!” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | WEB Windenergie AGPartial evidence | 91 | |||
“WEB Windenergie AG is a renewables & environment company based in Pfaffenschlag near Waidhofen, Lower Austria.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 47 | ||||
“CES clean energy solutions is an enginneering consultant company and serves you as competence centre for energy efficiency, renewable energy and sustainable development.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 47 | ||||
“LSG GROUP based in Austria, was originally founded as Leopold Jordan GmbH in Vienna in 1997, renamed 2010 to LJG Building Solutions GmbH and finally 2012 restructured to the LSG…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 44 | ||||
“Nomen est omen – solar konzentriert sich auf nachhaltige Energiesysteme und -lösungen für das dritte Jahrtausend.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 38 | ||||
“ALLPLAN GmbH was founded in Vienna in 1967.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 24 | ||||
“The AustriaEnergy Group is a global independent site developer with technology selección and IPP (Independent Power Producer) of utility-scale wind, green hydrogen and solar…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 22 | ||||
“ENEXSA (formerly VTU Energy) is a team of highly qualified engineers with long-term experience in the power industry who offer consulting services and software solutions for the…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 20 | ||||
“e7 is a private research and consulting company specialized in the energy efficiency and the renewable energy sector.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 20 | ||||
“Projektentwicklung, Beratung, Planung, Umsetzung von PV-Projekten für Gewerbe und Industrie” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 18 | ||||
“ECOwind is an Austrian pioneer in the field of wind power.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 16 | ||||
“The Energy Transformation - Our Vision for the 21st Century!” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 15 | ||||
“Das Energieinstitut Vorarlberg ist ein gemeinnütziger Verein zur Beratung, Bildung und Forschung für sinnvollen Energieeinsatz und erneuerbare Energieträger in Dornbirn…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 15 | ||||
“Mit unserer langjährigen Erfahrung im Energieeinkauf und unserem hohen technischen Know-How begleiten wir unsere Kunden partnerschaftlich und auf Augenhöhe in die Energiezukunft.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 13 | ||||
“Vor dem Hintergrund aktueller klimatischer Prozesse, neuer gesetzlicher Rahmenbedingungen und hoher Kosten wird Dekarbonisierung zu einem der wichtigsten Themen in der…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 12 | ||||
“Förderungen Im kaum überschaubaren Förderungsdschungel behalten wir den Durchblick.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 12 | ||||
“Maßgeschneiderte erneuerbare Energielösungen aus der Biomasse” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 12 | ||||
“Jeder Vision liegt ein WOFÜR zugrunde.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 11 | ||||
“Conversio Energie GmbH is a chemicals company based out of Koschatstraße 24, Spittal an der Drau, Austria.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 10 | ||||
“Die Firma Lechner + Partner Ingenieure bietet als befugtes Ingenieurbüro nicht nur Planungs- und Überwachungsleistungen an sondern versteht sich als technischer Dienstleister…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 10 | ||||
“We are a growing technical office for renewable energy located in Friedburg /Upper Austria.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | VoltaresStrong evidence | 10 | |||
“Voltares is an independent renewable energy developer focused on utility-scale and distributed assets in emerging markets.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 9 | ||||
“CORIOLIS Green Investment Solutions is a corporate finance and M&A boutique with an exclusive focus on renewable energy and environmental technology.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | Sunlumo Technology GmbhPartial evidence | 9 | |||
“Sunlumo is new - a green technology company with a focus on solar energy.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 9 | ||||
“Wir sind ein Beratungsunternehmen für Nachhaltigkeit, Energie & Klimaschutz mit Sitz in Wien.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 143 renewable energy consulting firms based in Austria
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Renewable energy consulting firms based in Austria at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 renewable energy consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Austria whose own description of what they do matches “renewable energy consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among renewable energy consulting firms, 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 an evidence 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, 613 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 5, 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.
Frequently asked
How many renewable energy consulting firms are there based in Austria?
RevenueBase identified 143 renewable energy consulting firms headquartered in Austria 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?
ILF Consulting Engineers In Austria, headquartered in Rum, tops this list with the largest team on record.
Which city has the most renewable energy consulting firms?
Wien leads with 16 headquartered companies, followed by Vienna (15) and Graz (5).
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 613 verified decision-maker contacts tracked across these 143 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 5, 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 SmartSearch, 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.
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