Company lists · Data refreshed September 2026
Top 25 Geothermal energy law firms based in Germany
RevenueBase identified 74 geothermal energy law firms headquartered in Germany as of September 2026 and tracks 419 professional contacts across them, including 188 with verified work emails. Berlin is the largest hub.
This list covers geothermal energy law firms headquartered in Germany, 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 28, 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.
The 25 largest geothermal energy law firms based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 50 contacts → | ||||
Partial evidence “BauGrund Süd Gesellschaft für Geothermie mbH is an utilities company based out of MAYBACHSTRASSE 5, Bad Wurzach, Germany.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 46 contacts → | ||||
Strong evidence “Chatham Partners is a law firm that specialises in the energy, infrastructure and complex real estate sectors.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 28 contacts → | ||||
Indirect evidence “Die Daldrup & Söhne AG ist Spezialist für Bohrtechnik und die Erschließung geologischer Ressourcen in Deutschland mit Sitz in Ascheberg, Nordrhein-Westfalen.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 21 contacts → | ||||
Partial evidence “Geothermie Neubrandenburg GmbH (GTN) is an internationally active consultancy and planning office of engineers and geoscientsits.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 21 contacts → | ||||
Strong evidence “ERDWERK GmbH is an independent planning office offering consulting services in the fields of geothermal energy, geology, hydrogeology, energetics and drilling technology.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 19 contacts → | ||||
Partial evidence “eine Gesellschaft der ENGIE-Gruppe, ist ein führendes Unternehmen für Wärme- und Kältelösungen im Bereich der Oberflächennahen Geothermie.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 17 contacts → | ||||
Strong evidence “Highly specialised law firm in renewable energy matters since 2012.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 15 contacts → | ||||
Partial evidence “Rosin Büdenbender ist eine auf Energierecht spezialisierte Kanzlei mit Sitz in Essen.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 9 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 8 contacts → | ||||
Partial evidence “Willkommen bei der PROMETHEUS Rechtsanwaltsgesellschaft, Ihrem Partner mit besonderem Schwerpunkt auf Erneuerbaren Energien und langjähriger Erfahrung im Verwaltungs, Zivil- und…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 8 contacts → | ||||
Partial evidence “Ikert-Tharun | Wähling und Partner Rechtsanwälte ist eine in Meißen ansässige Kanzlei mit Spezialisierung auf rechtliche Fragen rund um Erneuerbare Energien.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 7 contacts → | ||||
Partial evidence “CARNEADES Legal PartG mbB is an independent unique law firm.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 7 contacts → | ||||
Indirect evidence “Planhof entwickelt, strukturiert und realisiert anspruchsvolle technische Großprojekte.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 contacts → | ||||
Indirect evidence “Unabhängige Sachverständige und Planer verbinden Erkenntnisse aus neuester Forschung, wissenschaftliche Methoden und geologische Erfahrung aus jahrzehntelanger Praxis.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 7 contacts → | ||||
Partial evidence “KEMCO provides drilling management consulting services for Geothermal and Oil and Gas projects.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 contacts → | ||||
Indirect evidence “Geowell Erdwärme GmbH & Co.KG is a construction company based out of 5 Neckarstraße, Marl, Germany.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 contacts → | ||||
Indirect evidence “Die Weiss & Müller Rechtsanwaltsgesellschaft mbH ist eine bundesweit tätige Beratungseinheit mit Sitz in Berlin und Stuttgart, die auf umweltrechtliche Beratung spezialisiert ist.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 5 contacts → | ||||
Indirect evidence “Wir bieten unseren Kunden genau das, was sie brauchen – zukunftsorientierte und wirtschaftliche Lösung nach dem neuesten Stand von Wissenschaft und Technik.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 4 contacts → | ||||
Indirect evidence “Die Piewak & Partner GmbH besteht seit 1990.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Partial evidence “GEOCON Ingenieurbüro GmbH ist ein interdisziplinär arbeitendes Ingenieurbüro mit Schwerpunkt auf Boden, Energie und Ökologie.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Indirect evidence “Der Oberrheingraben zwischen Basel und Frankfurt birgt eines der größten Potenziale für erneuerbare Wärme in ganz Deutschland.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Partial evidence “Die Kanzlei iusverde berät Unternehmen im Bereich der Erneuerbaren Energien und Energiewirtschaftsrecht, sowie allgemein im Vertrags, Wirtschafts- und Gesellschaftsrecht.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 contacts → | ||||
Indirect evidence “Anglo-German firm providing bespoke legal services independently or in collaboration with trusted partners creating value through aggregating the right expertise.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2 contacts → | ||||
Indirect evidence “GeoAlto steht für nachhaltige Wärme und Kälte aus der Erde.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
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: geothermal energy law firms. 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 geothermal energy law firms.
- Partial evidence
- Its own public description names part of geothermal energy law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name geothermal energy law firms. 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 74 geothermal energy law firms based in Germany
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Geothermal energy law firms based in Germany at a glance
As of Sep 28, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 74 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 geothermal energy law firms, 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 Germany whose own description of what they do matches “geothermal energy law firms”. 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 geothermal energy law firms), 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 geothermal energy law firms, and records with no verified work email. Companies headquartered outside Germany 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, 188 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 28, 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
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 geothermal energy law firms, 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 geothermal energy law firms are there based in Germany?
RevenueBase identified 74 geothermal energy law firms headquartered in Germany 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?
Baugrund SÜD Gesellschaft FÜR Geothermie MBH, headquartered in Bad Wurzach, tops this list with the largest team on record.
Which city has the most geothermal energy law firms?
Berlin leads with 11 headquartered companies, followed by Hamburg (6) and Munich (4).
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 188 verified decision-maker contacts tracked across these 74 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 28, 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.
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