Company lists · Data refreshed September 2026

Top 25 Decarbonization consultancies based in France

Name: Decarbonization consultancies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 2,446 companies tracked

RevenueBase identified 2,446 decarbonization consultancies headquartered in France as of September 2026 and tracks 53,869 professional contacts across them, including 17,257 with verified work emails. Paris is the largest hub.

This list covers decarbonization consultancies 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 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

2,446Companies

53,869Contacts tracked

17,257Verified emails

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The 25 largest decarbonization consultancies based in France

Ranked by team size

Top 25 of 2,446 decarbonization consultancies based in France, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to decarbonization consultancies: 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	Engie Solutions France	Indirect evidence	La Garenne-colombes, FranceHQ checked Sep 28, 2026	10001+	12,011 contacts →
	Indirect evidence “Les activités Infrastructures Energétiques Locales d’ENGIE accompagnent les collectivités, les industries et le secteur du bâtiment sur la voie de la décarbonation.” Source: RevenueBase Database · checked Sep 28, 2026
2	Dalkia	Indirect evidence	Saint-andré-lez-lille, FranceHQ checked Sep 28, 2026	10001+	8,427 contacts →
	Indirect evidence “Dalkia : ensemble, relevons le défi climatique!” Source: RevenueBase Database · checked Sep 28, 2026
3	ERI	Indirect evidence	Fontenay Sous Bois, FranceHQ checked Sep 28, 2026	1,001-5,000	512 contacts →
	Indirect evidence “Engagé dans sa Raison d'Etre visant à dynamiser les modes de villes, de l'habitat à la mobilité, pour un patrimoine durable, le Groupe ERI est depuis 100 ans à la pointe de…” Source: RevenueBase Database · checked Sep 28, 2026
4	CRAM	Indirect evidence	Le Havre, FranceHQ checked Sep 28, 2026	501-1,000	448 contacts →
	Indirect evidence “Nous sommes des femmes et des hommes engagés, qui chaque matin se lèvent avec une mission : être des acteurs clés de la transition énergétique.” Source: RevenueBase Database · checked Sep 28, 2026
5	Inddigo	Indirect evidence	Chambéry, FranceHQ checked Sep 28, 2026	201-500	436 contacts →
	Indirect evidence “Ingénierie du développement durable” Source: RevenueBase Database · checked Sep 28, 2026
6	Greenflex	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	501-1,000	390 contacts →
	Indirect evidence “Since 2009, GreenFlex has been a key partner in the energy, environmental and societal transformation of organizations, enabling them to change their trajectory towards an economy…” Source: RevenueBase Database · checked Sep 28, 2026
7	Doris Group	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	501-1,000	365 contacts →
	Indirect evidence “DORIS is a leader in the provision of engineering, advisory, and project management services to the energy industry.” Source: RevenueBase Database · checked Sep 28, 2026
8	Greenyellow	Indirect evidence	Puteaux, FranceHQ checked Sep 28, 2026	501-1,000	336 contacts →
	Indirect evidence “In 17 years, GreenYellow has become a major player in the energy transition in France and abroad and a true partner of companies and communities.” Source: RevenueBase Database · checked Sep 28, 2026
9	IZI By EDF	Indirect evidence	Courbevoie, FranceHQ checked Sep 28, 2026	201-500	318 contacts →
	Indirect evidence “En 2019, le Groupe EDF veut rendre la vie des Français plus simple et lance IZI by EDF, sa plateforme pour accompagner ses clients vers la transition énergétique.” Source: RevenueBase Database · checked Sep 28, 2026
10	Hager France	Indirect evidence	Obernai, FranceHQ checked Sep 28, 2026	501-1,000	314 contacts →
	Indirect evidence “Notre valeur ajoutée : le conseil et les services adaptés à vos besoins et à vos exigences pour vous accompagner dans vos projets de distribution et de management de l'énergie et…” Source: RevenueBase Database · checked Sep 28, 2026
11	Manergy	Indirect evidence	Créteil, FranceHQ checked Sep 28, 2026	501-1,000	305 contacts →
	Indirect evidence “Depuis plus de 40 ans, MANERGY s’affirme comme une société indépendante de référence, spécialisée dans l’ingénierie et le conseil en transition énergétique et environnementale.” Source: RevenueBase Database · checked Sep 28, 2026
12	Energy Pool	Indirect evidence	Le Bourget Du Lac, FranceHQ checked Sep 28, 2026	51-200	300 contacts →
	Indirect evidence “At the centre of the smart grid revolution, Energy Pool manages and optimizes complex systems (energy consumption of industrial sites, decentralized production, renewable…” Source: RevenueBase Database · checked Sep 28, 2026
13	Eodd Ingénieurs Conseils	Indirect evidence	Villeurbanne, FranceHQ checked Sep 28, 2026	201-500	278 contacts →
	Indirect evidence “Créé en 1991, reconnu comme l’un des meilleurs cabinets français spécialiste de la transformation écologique, EODD ingénieurs conseils apporte sa vision transversale et ses…” Source: RevenueBase Database · checked Sep 28, 2026
14	Hello Watt	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	201-500	235 contacts →
	Indirect evidence “Chez Hello Watt, nous avons une conviction : la transition énergétique doit être simple et accessible à tous.” Source: RevenueBase Database · checked Sep 28, 2026
15	Nepsen	Indirect evidence	Vincennes, FranceHQ checked Sep 28, 2026	51-200	220 contacts →
	Indirect evidence “NEPSEN est un bureau d'études indépendant, spécialisé dans les métiers de la transition énergétique & écologique depuis 40 ans.” Source: RevenueBase Database · checked Sep 28, 2026
16	Airflux SAS	Indirect evidence	Lille, FranceHQ checked Sep 28, 2026	201-500	212 contacts →
	Indirect evidence “AIRFLUX, A RUBIX Company est, depuis plus de 40 ans, un intégrateur de solutions industrielles et a pour mission de vous accompagner dans vos projets autour de l’efficacité…” Source: RevenueBase Database · checked Sep 28, 2026
17	Beicip-Franlab	Indirect evidence	Rueil-malmaison, FranceHQ checked Sep 28, 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 28, 2026
18	Carbone 4	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	208 contacts →
	Indirect evidence “Founded by Alain Grandjean and Jean-Marc Jancovici, Carbone 4 is a leading independent consulting firm, specialized in energy transition, that offers its expertise to private or…” Source: RevenueBase Database · checked Sep 28, 2026
19	Ex'im	Indirect evidence	La Madeleine, FranceHQ checked Sep 28, 2026	201-500	207 contacts →
	Indirect evidence “Depuis plus de 20 ans, EX’IM s’engage dans la transition énergétique pour adapter les bâtiments (logements, entreprises, collectivités) aux enjeux de demain.” Source: RevenueBase Database · checked Sep 28, 2026
20	f.initiatives	Indirect evidence	Puteaux, FranceHQ checked Sep 28, 2026	201-500	193 contacts →
	Indirect evidence “F.initiatives est un expert du conseil en stratégies de financements publics de la R&D, de l’Innovation et des Investissements (R&D&I) depuis plus de 20 ans.” Source: RevenueBase Database · checked Sep 28, 2026
21	Tennaxia	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	165 contacts →
	Indirect evidence “Since 2001 Tennaxia has accompanied industrial companies who are committed to a Corporate and Environmental Responsibility approach and/or who are facing challenges concerning…” Source: RevenueBase Database · checked Sep 28, 2026
22	Citron	Indirect evidence	Suresnes, FranceHQ checked Sep 28, 2026	51-200	165 contacts →
	Indirect evidence “Citron® est une protech qui digitalise la gestion énergétique des entreprises, collectivités et bailleurs.” Source: RevenueBase Database · checked Sep 28, 2026
23	MON Courtier Énergie	Indirect evidence	Bordeaux, FranceHQ checked Sep 28, 2026	51-200	164 contacts →
	Indirect evidence “Notre mission : Grâce à notre expertise et à nos fournisseurs partenaires, nous permettons aux professionnels, collectivités et copropriétés de maîtriser leurs coûts énergétiques.” Source: RevenueBase Database · checked Sep 28, 2026
24	Alliance DES Énergies	Indirect evidence	Villeurbanne, FranceHQ checked Sep 28, 2026	51-200	161 contacts →
	Indirect evidence “Alliance des Énergies : L’allié de vos stratégies énergétiques à 360°!” Source: RevenueBase Database · checked Sep 28, 2026
25	R3	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	155 contacts →
	Indirect evidence “Expert de la réconciliation entre économie et écologie, R3 fait basculer les entreprises vers une transition environnementale et sociétale réellement performante.” Source: RevenueBase Database · checked Sep 28, 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: decarbonization consultancies. 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 decarbonization consultancies.
Partial evidence: Its own public description names part of decarbonization consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name decarbonization consultancies. 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 2,446 decarbonization consultancies based in France

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Decarbonization consultancies based in France at a glance

As of Sep 28, 2026

32.0%Verified-email coverage

22.0Average contacts per company

1-10Median size (employees)

21.6%Largest-city concentration · Paris

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,724

11-50

535

51-200

128

201-500

501-1,000

1,001-5,000

10001+

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 2,446 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 decarbonization consultancies, 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 “decarbonization consultancies”. 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 decarbonization consultancies), 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 decarbonization consultancies, 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, 17,257 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.

Decarbonization consultancies by metro

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 decarbonization consultancies, 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 decarbonization consultancies are there based in France?

RevenueBase identified 2,446 decarbonization consultancies 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?

Engie Solutions France, headquartered in La Garenne-Colombes, tops this list with the largest team on record.

Which city has the most decarbonization consultancies?

Paris leads with 529 headquartered companies, followed by Lyon (116) and Toulouse (51).

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 17,257 verified decision-maker contacts tracked across these 2,446 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.