Company lists · Data refreshed September 2026

Top 25 Geothermal reservoir engineering firms based in France

Name: Geothermal reservoir engineering firms based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 191 companies tracked

RevenueBase identified 191 geothermal reservoir engineering firms headquartered in France as of September 2026 and tracks 2,261 professional contacts across them, including 847 with verified work emails. Paris is the largest hub.

This list covers geothermal reservoir engineering firms headquartered in France, 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 16, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

191Companies

2,261Contacts tracked

847Verified emails

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The 25 largest geothermal reservoir engineering firms based in France

Ranked by team size

Top 25 of 191 geothermal reservoir engineering firms based in France, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal reservoir engineering firms: 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	Groupe Géotec	Indirect evidence	Quetigny, FranceHQ checked Sep 16, 2026	501-1,000	441 contacts →
	Indirect evidence “Groupe Géotec, bureau d’études en ingénierie géotechnique et environnementale, créé en 1973, conseille l’ensemble des interlocuteurs de l’acte de construire : maîtres d’ouvrage…” Source: RevenueBase Database · checked Sep 16, 2026
2	Beicip-Franlab	Indirect evidence	Rueil-malmaison, FranceHQ checked Sep 16, 2026	51-200	212 contacts →
	Indirect evidence “Beicip-Franlab is a leading Energy Consultancy and Software Editor created in the 1960's with recognized worldwide hands-on expertise.” Source: RevenueBase Database · checked Sep 16, 2026
3	Semofi	Indirect evidence	Villeneuve-le-roi, FranceHQ checked Sep 16, 2026	51-200	114 contacts →
	Indirect evidence “Filiale du Groupe SEMOFI, acteur majeur des filières géotechnique et SSP, SEMOFI est un bureau d’études dont la vocation est d’accompagner les collectivités territoriales…” Source: RevenueBase Database · checked Sep 16, 2026
4	Geolia	Indirect evidence	Morangis, FranceHQ checked Sep 16, 2026	51-200	58 contacts →
	Indirect evidence “Bureau d'Etudes Géotechniques, Hydrogéologie et Sites et Sols Pollués, Ingénierie des sols et fondations.” Source: RevenueBase Database · checked Sep 16, 2026
5	Akajoule	Indirect evidence	Saint Nazaire, FranceHQ checked Sep 16, 2026	11-50	54 contacts →
	Indirect evidence “AKAJOULE est un bureau d’étude spécialisé dans l’accompagnement et l’ingénierie en énergie et environnement.” Source: RevenueBase Database · checked Sep 16, 2026
6	CFG Geothermal	Indirect evidence	Orleans, FranceHQ checked Sep 16, 2026	11-50	46 contacts →
	Indirect evidence “CFG Services est une société de services et d’ingénierie, filiale à 100% du BRGM, spécialisée en géothermie qui dès le début des années 80 a été pionnière dans le développement…” Source: RevenueBase Database · checked Sep 16, 2026
7	Gexplore	Indirect evidence	Ludres, FranceHQ checked Sep 16, 2026	11-50	41 contacts →
	Indirect evidence “GexplOre \| Specialists in Geology, Geophysics, Well Logging & Mining Consultation GexplOre is a leader in geological exploration, providing consulting services and integrated…” Source: RevenueBase Database · checked Sep 16, 2026
8	Armasol	Indirect evidence	Réaumont, FranceHQ checked Sep 16, 2026	51-200	40 contacts →
	Indirect evidence “ARMASOL et ses bureaux d'études géotechniques implantés sur l'ensemble du territoire national vous accompagnent pour aménager et construire en toute sérénité.” Source: RevenueBase Database · checked Sep 16, 2026
9	Realtimeseismic	Indirect evidence	Pau, FranceHQ checked Sep 16, 2026	11-50	37 contacts →
	Indirect evidence “Realtimeseismic is a leading geophysics services and technology solutions company – we are passionate about innovating to bring agile, accurate geophysics solutions to our valued…” Source: RevenueBase Database · checked Sep 16, 2026
10	IMAEE	Indirect evidence	Selestat, FranceHQ checked Sep 16, 2026	11-50	26 contacts →
	Indirect evidence “IMAEE est un bureau d'études fluides, thermique, électricité, photovoltaïque, performance énergétique et rénovation TCE.” Source: RevenueBase Database · checked Sep 16, 2026
11	Abac Ingenierie	Indirect evidence	Villefranche Sur Saone, FranceHQ checked Sep 16, 2026	11-50	24 contacts →
	Indirect evidence “ABAC INGENIERIE est un bureau d études spécialisé en Fluides (Thermique,Plomberie,CVC,Electricite CFO CFA,SSI, energies renouvelables) et Structures” Source: RevenueBase Database · checked Sep 16, 2026
12	Espace Temps	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	24 contacts →
	Indirect evidence “Ingénierie thermique, énergétique et environnementale du bâtiment” Source: RevenueBase Database · checked Sep 16, 2026
13	Lemasson	Indirect evidence	Agneaux, FranceHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “L’entreprise Lemasson créée en 1975, se situant à Agneaux dans la Manche dans la région de Normandie, est concepteur et fabricant de pompes à chaleur géothermiques.” Source: RevenueBase Database · checked Sep 16, 2026
14	Cpgf Horizon & Formation	Indirect evidence	Avon, FranceHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “CPGF HORIZON est un bureau d’ingénierie spécialisé en geo-sciences.” Source: RevenueBase Database · checked Sep 16, 2026
15	Bio-Énergies Diffusion	Indirect evidence	Castanet-tolosan, FranceHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Bio-Énergies Diffusion est le n°1 de la géothermie dans tout le Sud-Ouest de la France.” Source: RevenueBase Database · checked Sep 16, 2026
16	APC Ingenierie	Indirect evidence	Vigneux-de-bretagne, FranceHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Notre bureau d'études est spécialisé en géotechnique, géologie, hydrogéologie, environnement et diagnostic pollution, essais sur béton et matériaux de la construction, contrôle et…” Source: RevenueBase Database · checked Sep 16, 2026
17	Geosophy	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Vous souhaitez valoriser votre patrimoine immobilier, maîtriser sa consommation énergétique en lui assurant un approvisionnement local pour son confort thermique?” Source: RevenueBase Database · checked Sep 16, 2026
18	Cotrasol	Indirect evidence	Acheres, FranceHQ checked Sep 16, 2026	11-50	19 contacts →
	Indirect evidence “COTRASOL est une entreprise de forage pour l'eau et la géothermie, depuis 1963 nous réalisons des captages d'eau pour le bâtiment, l'adduction d'eau potable, l'irrigation…” Source: RevenueBase Database · checked Sep 16, 2026
19	Stratégéo Conseil	Indirect evidence	Grigny, FranceHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect evidence “StratéGéO Conseil est un bureau d'étude en Géothermie & Hydrogéologie basé au 26 rue des Carriers Italiens à Grigny (91), intervenant sur tout le territoire national.” Source: RevenueBase Database · checked Sep 16, 2026
20	TLS Geothermics	Partial evidence	Toulouse, FranceHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “TLS Geothermics is a geoscience tech company, exploring and developing geothermal projects for power, heat, cold and byproducts.” Source: RevenueBase Database · checked Sep 16, 2026
21	EGEH	Indirect evidence	Limoges, FranceHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “From its creation in 1994, our company has been involved in those environmental areas where it can display the expertise of its team of geologists and hydrogeologists.” Source: RevenueBase Database · checked Sep 16, 2026
22	Drillheat	Indirect evidence	Maisse (91), FranceHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “Expert en forage géothermique de surface.” Source: RevenueBase Database · checked Sep 16, 2026
23	Geother	Strong evidence	Nanterre, FranceHQ checked Sep 16, 2026	1-10	14 contacts →
	Strong evidence “GEOTHER is an engineering and consulting company specializing in geothermal energy and, in a general way, in renewable energies, groundwater management and hydrogeotechnics.” Source: RevenueBase Database · checked Sep 16, 2026
24	In.S.E. Ingénierie DES Structures ET DES Energies	Indirect evidence	Onet Le Chateau, FranceHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect evidence “IN.S.E.” Source: RevenueBase Database · checked Sep 16, 2026
25	Mica Environnement	Indirect evidence	Bedarieux, FranceHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 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: geothermal reservoir engineering 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 reservoir engineering firms.
Partial evidence: Its own public description names part of geothermal reservoir engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geothermal reservoir engineering 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 191 geothermal reservoir engineering firms based in France

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Geothermal reservoir engineering firms based in France at a glance

As of Sep 16, 2026

37.5%Verified-email coverage

11.8Average contacts per company

1-10Median size (employees)

4.7%Largest-city concentration · Paris

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

126

11-50

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 191 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 reservoir engineering 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 France whose own description of what they do matches “geothermal reservoir engineering 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 reservoir engineering 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 reservoir engineering firms, and records with no verified work email. Companies headquartered outside France 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, 847 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 16, 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 reservoir engineering 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 reservoir engineering firms are there based in France?

RevenueBase identified 191 geothermal reservoir engineering firms headquartered in France 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?

Groupe Géotec, headquartered in France, tops this list with the largest team on record.

Which city has the most geothermal reservoir engineering firms?

Paris leads with 9 headquartered companies, followed by Orleans (6) and Pau (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 847 verified decision-maker contacts tracked across these 191 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 16, 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.