Company lists · Data refreshed November 2026

Top 24 Geothermal energy organizations based in Germany

RevenueBase identified 239 company matches for geothermal energy organizations associated with Germany as of November 2026 and tracks 3,448 professional contacts across them, including 876 with verified work emails. Berlin is the largest hub.

This list covers company matches for geothermal energy organizations associated with Germany, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
239Companies
3,448Contacts tracked
876Verified emails
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The 24 largest geothermal energy organizations based in Germany

Ranked by team size
Top 24 of 239 company matches for geothermal energy organizations based in Germany, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchFreiburg, GermanyHQ recorded Nov 6, 20261,001-5,000950 contacts →

Exact match

“The Fraunhofer Institute for Solar Energy Systems ISE in Freiburg, Germany is the largest solar research institute in Europe.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchMannheim, GermanyHQ recorded Nov 6, 202651-200239 contacts →

Exact match

“FGH was founded in 1921.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchPotsdam, GermanyHQ recorded Nov 6, 2026201-50074 contacts →

Exact match

“Die Danpower-Gruppe ist ein mittelständisch strukturiertes Wärmeversorgungs- und Contractingunternehmen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBitterfeld, GermanyHQ recorded Nov 6, 202651-20058 contacts →

Exact match

“Die envia THERM GmbH, Bitterfeld-Wolfen, ist eine 100-prozentige Tochter der envia Mitteldeutsche Energie AG.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchBad Wurzach, GermanyHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“BauGrund Süd Gesellschaft für Geothermie mbH is an utilities company based out of MAYBACHSTRASSE 5, Bad Wurzach, Germany.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchEssen, GermanyHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“is the international technical association for the generation and storage of electricity and heat.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchHerne, GermanyHQ recorded Nov 6, 202651-20034 contacts →

Exact match

“Die WATERKOTTE GmbH ist mit über 50 Jahren Erfahrung als Hersteller nachhaltiger Energiesysteme auf Basis der Wärmepumpe ein Pionier der Branche.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchCologne, GermanyHQ recorded Nov 6, 202651-20034 contacts →

Exact match

“heimWatt hat Ende Januar 2025 u.a.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchAscheberg, GermanyHQ recorded Nov 6, 202651-20031 contacts →

Exact match

“Die Daldrup & Söhne AG ist Spezialist für Bohrtechnik und die Erschließung geologischer Ressourcen in Deutschland mit Sitz in Ascheberg, Nordrhein-Westfalen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBerlin, GermanyHQ recorded Nov 6, 202611-5030 contacts →

Exact match

“Als Dachverband der Erneuerbare-Energien-Branche in Deutschland bündelt der BEE die Interessen von 55 Verbänden und Unternehmen aus den Branchen der Wind, Bio- und Solarenergie…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchPeine, GermanyHQ recorded Nov 6, 2026201-50028 contacts →

Exact match

“Die GERMAN WATER and ENERGY GROUP (GWE) ist Hersteller richtungsweisender Produkte und Entwickler integrierter Anwendungen für den Brunnenbau und die Geothermie.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchPullach Im Isartal, GermanyHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“IEP Innovative Energie für Pullach GmbH is a geothermal and district heating operator based in Pullach im Isartal, Germany.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchMunich, GermanyHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“ERDWERK GmbH is an independent planning office offering consulting services in the fields of geothermal energy, geology, hydrogeology, energetics and drilling technology.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchFrankfurt, GermanyHQ recorded Nov 6, 202611-5022 contacts →

Exact match

“Der AGFW.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchBerlin, GermanyHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“Der Bundesverband Wärmepumpe (BWP) e.V.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchGladbeck, GermanyHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“Energiewender mit Weitblick Wir wollen die Wende in Nordrhein-Westfalen gemeinsam schaffen – hin zu einem verantwortungsbewussten System der Energieversorgung, von dem wir und…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchKarlsruhe, GermanyHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Deutsche ErdWärme entwickelt, baut, finanziert und betreibt Erdwärmeanlagen zur Dekarbonisierung von Wärmenetzen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchNeubrandenburg, GermanyHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Geothermie Neubrandenburg GmbH (GTN) is an internationally active consultancy and planning office of engineers and geoscientsits.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchFreiberg, GermanyHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“eine Gesellschaft der ENGIE-Gruppe, ist ein führendes Unternehmen für Wärme- und Kältelösungen im Bereich der Oberflächennahen Geothermie.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchHanover, GermanyHQ recorded Nov 6, 2026501-1,00015 contacts →

Exact match

“Die GETEC GRUPPE ist ein Verbund von Energiedienstleistungsunternehmen sowie deutschland- und europaweiten Beteiligungen und Aktivitäten in den Bereichen Innovative Technologien…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchKulmbach, GermanyHQ recorded Nov 6, 2026201-50013 contacts →

Exact match

“Qvantum is an international industry that offers heat pumps for the next generation heating and cooling technologies that enables the decarbonization of our cities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchJena, GermanyHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“Unser Arbeitsgebiet erstreckt sich über die gesamte Geosphäre.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchGrünwald, GermanyHQ recorded Nov 6, 202611-5012 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchHalbergmoos, GermanyHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“Wir machen Energiewende" Wir planen, bauen, betreiben und betreuen Energieanlagen und übernehmen dabei die gesamte Planung und Umsetzung der Anlagen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 24 of 239 geothermal energy organizations based in Germany

See the full list, filter by size, metro and specialty, and access 876 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal energy organizations based in Germany at a glance

As of Nov 6, 2026
25.4%Verified-email coverage
14.4Average contacts per company
11-50Median size (employees)
9.2%Largest-city concentration · Berlin
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
109
11-50
78
51-200
25
201-500
8
501-1,000
1
1,001-5,000
1

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 239 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with Germany whose business descriptions match “geothermal energy organizations” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 876 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “geothermal energy organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal energy organizations are there based in Germany?

RevenueBase identified 239 company matches for geothermal energy organizations associated with Germany as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Fraunhofer-Institut FÜR Solare Energiesysteme ISE tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal energy organizations?

Berlin leads with 22 company records, followed by Munich (10) and Dusseldorf (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 876 professional contacts with verified work emails tracked across these 239 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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.