Company lists · Data refreshed September 2026

Top 25 Energy efficiency contractors based in France

Name: Energy efficiency contractors based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 921 companies tracked

RevenueBase identified 921 energy efficiency contractors headquartered in France as of September 2026 and tracks 17,169 professional contacts across them, including 7,397 with verified work emails. Paris is the largest hub.

This list covers energy efficiency contractors 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

921Companies

17,169Contacts tracked

7,397Verified emails

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The 25 largest energy efficiency contractors based in France

Ranked by team size

Top 25 of 921 energy efficiency contractors 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 energy efficiency contractors: 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	Dalkia	Indirect evidence	Saint-andré-lez-lille, FranceHQ checked Sep 16, 2026	10001+	8,427 contacts →
	Indirect evidence “Dalkia : ensemble, relevons le défi climatique!” Source: RevenueBase Database · checked Sep 16, 2026
2	Veolia Industries Global Solutions	Partial evidence	Aubervilliers, FranceHQ checked Sep 16, 2026	1,001-5,000	460 contacts →
	Partial evidence “Veolia Industries Global Solutions est devenu Veolia Energie Performance depuis le 1er juin 2025.” Source: RevenueBase Database · checked Sep 16, 2026
3	Homeserve France	Indirect evidence	Lyon Cedex 7, FranceHQ checked Sep 16, 2026	501-1,000	366 contacts →
	Indirect evidence “Depuis près de 25 ans, HomeServe accompagne les particuliers vers une maison plus durable, plus sûre et plus économique.” Source: RevenueBase Database · checked Sep 16, 2026
4	IZI By EDF	Indirect evidence	Courbevoie, FranceHQ checked Sep 16, 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 16, 2026
5	Hellio	Indirect evidence	Clichy, FranceHQ checked Sep 16, 2026	201-500	293 contacts →
	Indirect evidence “Engagé depuis 2008, Hellio est le pionnier du marché des économies d’énergie en France (métropole et Outre-Mer).” Source: RevenueBase Database · checked Sep 16, 2026
6	EFFY	Partial evidence	Paris, FranceHQ checked Sep 16, 2026	201-500	292 contacts →
	Partial evidence “Effy, spécialiste de l’efficience énergétique.” Source: RevenueBase Database · checked Sep 16, 2026
7	Sonergia	Indirect evidence	Marseille, FranceHQ checked Sep 16, 2026	51-200	151 contacts →
	Indirect evidence “Implantée à Marseille depuis 2009, SONERGIA s’inscrit dans une démarche de développement durable en accompagnant les fournisseurs d’énergie, appelés obligés, dans l’atteinte des…” Source: RevenueBase Database · checked Sep 16, 2026
8	accenta.ai	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 16, 2026	51-200	149 contacts →
	Indirect evidence “Accenta aide les acteurs de l’immobilier à maîtriser leurs charges, valoriser leurs actifs et répondre aux exigences réglementaires, grâce à la performance énergie-carbone.” Source: RevenueBase Database · checked Sep 16, 2026
9	Sénova	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	51-200	139 contacts →
	Indirect evidence “Sénova est "le partenaire de la rénovation énergétique de votre habitat".” Source: RevenueBase Database · checked Sep 16, 2026
10	Certinergy	Indirect evidence	La Garenne-colombes, FranceHQ checked Sep 16, 2026	51-200	129 contacts →
	Indirect evidence “Depuis sa création en 2008, CertiNergy se mobilise pour impulser et mettre en œuvre des actions d’économies d’énergie pour tous les consommateurs d’énergie, du particulier à…” Source: RevenueBase Database · checked Sep 16, 2026
11	CDC Conseil	Indirect evidence	Joué-lès-tours, FranceHQ checked Sep 16, 2026	51-200	98 contacts →
	Indirect evidence “CDC Conseil est une entreprise qui propose - Aux gestionnaires de patrimoines immobiliers des prestations de conseil de suivi d’exploitation, d’achat d’énergie et des solutions…” Source: RevenueBase Database · checked Sep 16, 2026
12	Energie & Service	Indirect evidence	Versailles, FranceHQ checked Sep 16, 2026	51-200	93 contacts →
	Indirect evidence “Avez-vous besoin d'aide pour améliorer les performances énergétiques de vos bâtiments?” Source: RevenueBase Database · checked Sep 16, 2026
13	ECO Environnement	Indirect evidence	Pantin, FranceHQ checked Sep 16, 2026	51-200	84 contacts →
	Indirect evidence “Éco Environnement – Expert en transition énergétique durable Éco Environnement accompagne entreprises et collectivités dans leur passage à l’énergie verte.” Source: RevenueBase Database · checked Sep 16, 2026
14	Green Energy Service	Partial evidence	Paris, FranceHQ checked Sep 16, 2026	51-200	70 contacts →
	Partial evidence “Green Energy Service est un opérateur de services énergétiques (ESCO) spécialisé dans l’amélioration de la performance énergétique des bâtiments.” Source: RevenueBase Database · checked Sep 16, 2026
15	Groupe Sofratherm - Setemi	Indirect evidence	Suresnes, FranceHQ checked Sep 16, 2026	51-200	68 contacts →
	Indirect evidence “Le groupe Sofratherm - Setemi est un groupe de services en efficacité énergétique.” Source: RevenueBase Database · checked Sep 16, 2026
16	Erese Groupe Scet HTC	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	51-200	62 contacts →
	Indirect evidence “ERESE \| Groupe SCET HTC est un bureau d’études spécialisé dans les énergies, les réseaux et l’environnement.” Source: RevenueBase Database · checked Sep 16, 2026
17	Ynergie	Indirect evidence	Toulouse, FranceHQ checked Sep 16, 2026	11-50	57 contacts →
	Indirect evidence “Ynergie, c’est un accompagnement sur-mesure d’un projet d’efficacité énergétique avec - de l'ingénierie financière (CEE, MaPrimeRénov', Guichet ADEME.)- de l'ingénierie de projets” Source: RevenueBase Database · checked Sep 16, 2026
18	ACE Energie	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	56 contacts →
	Indirect evidence “ACE Énergie est une société de services en d'efficacité énergétique qui propose 3 offres :=> Offre de financement de projet : Nous participons au financement de projets…” Source: RevenueBase Database · checked Sep 16, 2026
19	Alter Watt	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	56 contacts →
	Indirect evidence “Alter Watt est un bureau d’études énergétiques, né de la conviction que la transition écologique est un enjeu majeur des années à venir.” Source: RevenueBase Database · checked Sep 16, 2026
20	Ithaque	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	56 contacts →
	Indirect evidence “Ithaque a été créée avec la conviction que la rénovation énergétique des maisons est un enjeu central de la transition écologique.” Source: RevenueBase Database · checked Sep 16, 2026
21	Crust Energie	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	55 contacts →
	Indirect evidence “Crust énergie réalise des travaux rénovation énergétique et les finance à 100%.” Source: RevenueBase Database · checked Sep 16, 2026
22	VIRIA	Indirect evidence	Caen, FranceHQ checked Sep 16, 2026	51-200	54 contacts →
	Indirect evidence “Qui sommes-nous?” Source: RevenueBase Database · checked Sep 16, 2026
23	Optima Énergie	Indirect evidence	Plescop, FranceHQ checked Sep 16, 2026	11-50	54 contacts →
	Indirect evidence “Créée en 2016, Optima Énergie est un cabinet de #conseil en #énergie basé en #Bretagne.” Source: RevenueBase Database · checked Sep 16, 2026
24	Sobre Energie	Partial evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	53 contacts →
	Partial evidence “Sobre Energie, est une solution Deepki, dédiée à l’Energy Management et à l’accompagnement des entreprises et des collectivités dans la sobriété énergétique de leurs parcs…” Source: RevenueBase Database · checked Sep 16, 2026
25	Sibel Energie	Partial evidence	Montreuil, FranceHQ checked Sep 16, 2026	11-50	52 contacts →
	Partial evidence “Sibel Energie Sibel Energie est une société de services mise en place afin d’inciter les particuliers à faire des économies d’énergie sur le territoire national.” 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: energy efficiency contractors. 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 energy efficiency contractors.
Partial evidence: Its own public description names part of energy efficiency contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency contractors. 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 921 energy efficiency contractors based in France

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Energy efficiency contractors based in France at a glance

As of Sep 16, 2026

43.1%Verified-email coverage

18.6Average contacts per company

1-10Median size (employees)

13.4%Largest-city concentration · Paris

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

566

11-50

278

51-200

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 921 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 energy efficiency contractors, 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 “energy efficiency contractors”. 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 energy efficiency contractors), 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 energy efficiency contractors, 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, 7,397 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.

Energy efficiency contractors by metro

Energy efficiency contractors in Paris123
Energy efficiency contractors in Lyon31

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 energy efficiency contractors, 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 energy efficiency contractors are there based in France?

RevenueBase identified 921 energy efficiency contractors 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?

Dalkia, headquartered in Saint-Andre-Lez-Lille, tops this list with the largest team on record.

Which city has the most energy efficiency contractors?

Paris leads with 123 headquartered companies, followed by Lyon (31) and Toulouse (21).

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 7,397 verified decision-maker contacts tracked across these 921 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.