Company lists · Data refreshed November 2026

Top 25 Geothermal engineering firms based in Germany

RevenueBase identified 693 company matches for geothermal engineering firms associated with Germany as of November 2026 and tracks 8,509 professional contacts across them, including 1,610 with verified work emails. Berlin is the largest hub.

This list covers company matches for geothermal engineering firms 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
693Companies
8,509Contacts tracked
1,610Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest geothermal engineering firms based in Germany

Ranked by team size
Top 25 of 693 company matches for geothermal engineering firms 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 matchWitten, GermanyHQ recorded Nov 6, 2026201-500122 contacts →

Exact match

“Dr.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchHanover, GermanyHQ recorded Nov 6, 2026201-50097 contacts →

Exact match

“Mit unseren zahlreichen Standorten und Niederlassungen bundesweit bieten wir unseren Kunden alle Leistungen von der Flächenerkundung über Planung und Überwachung von…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchBerlin, GermanyHQ recorded Nov 6, 202651-20093 contacts →

Exact match

“Die BLS Energieplan GmbH wurde 1984 gegründet und hat ihr Portfolio an Ingenieurdienstleistungen seither kontinuierlich erweitert.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchHamburg, GermanyHQ recorded Nov 6, 202651-20084 contacts →

Exact match

“We are visionaries and engineers, generalists and specialists.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchStuttgart, GermanyHQ recorded Nov 6, 202651-20064 contacts →

Exact match

“High Comfort – Low Impact Transsolar KlimaEngineering ist ein international tätiges Ingenieurbüro.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchHamburg, GermanyHQ recorded Nov 6, 202651-20060 contacts →

Exact match

“Wir planen und bauen die Zukunft.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchMunich, GermanyHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“Die TEAM FÜR TECHNIK GmbH ist eine der innovativsten Ingenieurgesellschaften für Energie- und Versorgungstechnik.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact 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
9Exact matchZwickau, GermanyHQ recorded Nov 6, 202651-20054 contacts →

Exact match

“Die G.U.B.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLilienthal, GermanyHQ recorded Nov 6, 202651-20048 contacts →

Exact match

“ö ü –, Als unabhängiges ü ü entwickeln wir innovative Lösungen für eine sichere und wirtschaftliche Energie- und Wasserversorgung.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchNorderstedt, GermanyHQ recorded Nov 6, 202651-20047 contacts →

Exact match

“Assmann Emutec ist ein Unternehmen des BKW Engineering - Network of Excellence® – dem größten Engineering Netzwerk im deutschsprachigen Raum.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchEttlingen, GermanyHQ recorded Nov 6, 202651-20047 contacts →

Exact match

“Sicherheit für Ihre Bauvorhaben – vom ersten Gutachten bis zur messtechnischen Überwachung.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchNuremberg, GermanyHQ recorded Nov 6, 202651-20045 contacts →

Exact match

“Envi Con Engineering GmbH ist ein führendes technologieunabhängiges Ingenieurunternehmen für Energieversorger, Entsorger, Stadtwerke, für die Industrie und Anlagenbauer sowie…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchBad Wiessee, GermanyHQ recorded Nov 6, 2026501-1,00044 contacts →

Exact match

“Die M&P Group ist eine deutsche Ingenieurgesellschaft und ist führend im Bereich für Nachhaltigkeit.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchHamburg, GermanyHQ recorded Nov 6, 202651-20040 contacts →

Exact match

“Wir sind IGB!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchMunich, GermanyHQ recorded Nov 6, 202611-5037 contacts →

Exact match

“We take responsibility for your project and stand steadfastly by your side in our role as technical expert.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchMunich, GermanyHQ recorded Nov 6, 202651-20037 contacts →

Exact match

“Wir, Boley Geotechnik GmbH, sind ein mittelständisches Unternehmen mit insgesamt rund 50 Mitarbeitern an unserem Standort in München.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBerlin, GermanyHQ recorded Nov 6, 202651-20037 contacts →

Exact match

“The core competencies of the GuD Group of companies comprise the applied geosciences, geotechnics, dynamics and environmental engineering.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchBerlin, GermanyHQ recorded Nov 6, 202651-20035 contacts →

Exact match

“4initia GmbH offers first class engineering and consultancy services in all areas within the renewable energy industry, with a particular focus on wind and solar.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLauterbach, GermanyHQ recorded Nov 6, 202651-20035 contacts →

Exact match

“bauart - Consulting Engineers \ We advise, plan and support exciting construction projects throughout Germany.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchNuremberg, GermanyHQ recorded Nov 6, 202651-20034 contacts →

Exact match

“Gestatten, R&H Umwelt.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchAachen, GermanyHQ recorded Nov 6, 202611-5034 contacts →

Exact match

“Energy consulting for industry and engineering for thermal, process, and energy systems – solving complex challenges and maximizing efficiency through simulation, thermodynamics…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact 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
24Exact matchHanover, GermanyHQ recorded Nov 6, 202611-5031 contacts →

Exact match

“u&i GmbH - Engineering from one source Since 29 years, we have assumed responsibility for people and the environment.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchGröbenzell, GermanyHQ recorded Nov 6, 202651-20030 contacts →

Exact match

“Die Nickol & Partner AG ist ein interdisziplinäres Planungs- und Ingenieurbüro mit Standorten in Gröbenzell und München.”

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

Showing 25 of 693 geothermal engineering firms based in Germany

See the full list, filter by size, metro and specialty, and access 1,610 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Geothermal engineering firms based in Germany at a glance

As of Nov 6, 2026
18.9%Verified-email coverage
12.3Average contacts per company
1-10Median size (employees)
6.5%Largest-city concentration · Berlin
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
354
11-50
231
51-200
56
201-500
7
501-1,000
3
10001+
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 693 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 engineering firms” 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 1,610 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 engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal engineering firms are there based in Germany?

RevenueBase identified 693 company matches for geothermal engineering firms 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?

Dr. Spang Ingenieurgesellschaft tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal engineering firms?

Berlin leads with 45 company records, followed by Munich (28) and Hamburg (18).

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 1,610 professional contacts with verified work emails tracked across these 693 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.

Ready to reach these companies? Verified emails and direct dials for all 693 geothermal engineering firms based in Germany. Start with a free account, no credit card.

Download this list →

Related lists

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.