Company lists · Data refreshed September 2026

Top 25 Natural gas optimization companies based in France

Name: Natural gas optimization companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 132 companies tracked

RevenueBase identified 132 natural gas optimization companies headquartered in France as of September 2026 and tracks 3,450 professional contacts across them, including 678 with verified work emails. Paris is the largest hub.

This list covers natural gas optimization companies 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 20, 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 20, 2026 86% judged on-target in blind review

132Companies

3,450Contacts tracked

678Verified emails

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The 25 largest natural gas optimization companies based in France

Ranked by team size

Top 25 of 132 natural gas optimization companies based in France, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to natural gas optimization companies: 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	Atlantic Ingénierie	Indirect evidence	Saint-herblain, FranceHQ checked Sep 20, 2026	201-500	341 contacts →
	Indirect evidence “Atlantic Ingénierie, l’énergie d’avancer ensemble Chez Atlantic Ingénierie, nous avons une conviction : les projets d’énergie et d’industrie avancent mieux quand on allie…” Source: RevenueBase Database · checked Sep 20, 2026
2	Sofregaz SAS	Indirect evidence	Puteaux, FranceHQ checked Sep 20, 2026	51-200	122 contacts →
	Indirect evidence “SOFREGAZ is a leading independent engineering company, created in 1959 by Gaz de France, with over 1300 projects across 95 countries.” Source: RevenueBase Database · checked Sep 20, 2026
3	Energie & Service	Indirect evidence	Versailles, FranceHQ checked Sep 20, 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 20, 2026
4	Arnest	Indirect evidence	Puteaux, FranceHQ checked Sep 20, 2026	51-200	72 contacts →
	Indirect evidence “Organisée sur un modèle de start-up, Arnest réalise des services d’ingénierie et de management de projets pour le secteur de l'énergie.” Source: RevenueBase Database · checked Sep 20, 2026
5	Groupe Inatis	Indirect evidence	Villeneuve-d’ascq, FranceHQ checked Sep 20, 2026	51-200	69 contacts →
	Indirect evidence “Postuler à nos offres d'emploi : Envoyer votre CV : Le Groupe Inatis, Ingénierie et Conseil en technologies, est spécialisé dans l’assistance technique aux grands donneurs…” Source: RevenueBase Database · checked Sep 20, 2026
6	Aginergy	Indirect evidence	Lyon, FranceHQ checked Sep 20, 2026	51-200	58 contacts →
	Indirect evidence “Aginergy est une société de conseil en Ingénierie spécialisée en POWER & PROCESS.” Source: RevenueBase Database · checked Sep 20, 2026
7	Ecogreenenergy	Indirect evidence	Strasbourg, FranceHQ checked Sep 20, 2026	51-200	54 contacts →
	Indirect evidence “Et si l’énergie que vous perdez aujourd’hui devenait votre plus grand levier de compétitivité?” Source: RevenueBase Database · checked Sep 20, 2026
8	Akajoule	Indirect evidence	Saint Nazaire, FranceHQ checked Sep 20, 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 20, 2026
9	Optima Énergie	Indirect evidence	Plescop, FranceHQ checked Sep 20, 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 20, 2026
10	PLCB	Partial evidence	Pau, FranceHQ checked Sep 20, 2026	51-200	54 contacts →
	Partial evidence “PLCB Engineering est une société d'Ingénierie et de conseil spécialisée dans les industries Oil & Gas, Chimie & Pétrochimie, Projet Minier, Nucléaire et Énergies renouvelables…” Source: RevenueBase Database · checked Sep 20, 2026
11	Best Energies	Indirect evidence	Montreuil, FranceHQ checked Sep 20, 2026	11-50	42 contacts →
	Indirect evidence “Best Energies is an engineering firm leader in energy performance and savings, specialized in renewable energies as well as conventional, for heating and air conditioning systems.” Source: RevenueBase Database · checked Sep 20, 2026
12	DE Viris	Indirect evidence	Aix-en-provence, FranceHQ checked Sep 20, 2026	51-200	31 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
13	Batimgie	Indirect evidence	Angers, FranceHQ checked Sep 20, 2026	11-50	27 contacts →
	Indirect evidence “BatiMgie est un bureau d’études indépendant spécialisé dans la performance énergétique des bâtiments et la maîtrise d’œuvre fluide, thermique et environnementale.” Source: RevenueBase Database · checked Sep 20, 2026
14	BMR Glass	Indirect evidence	Pélissanne, FranceHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence “Spécialisée dans l'optimisation technique et financière des moyens de production industriels, la société BMR est aujourd'hui le partenaire incontournable dans la réduction des…” Source: RevenueBase Database · checked Sep 20, 2026
15	Si-Nergie Ingenierie	Indirect evidence	Entzheim, FranceHQ checked Sep 20, 2026	11-50	20 contacts →
	Indirect evidence “Acteur majeur dans le secteur industriel Si-nergie Ingénierie s'engage aux côtés des entreprises depuis de nombreuses années dans 2 secteurs majeurs et stratégiques : Energie &…” Source: RevenueBase Database · checked Sep 20, 2026
16	Cler Ingénierie	Indirect evidence	Saint Priest, FranceHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “Cler ingénierie est un bureau d’études au service des maîtres d’ouvrages publics et privés concernés par les problématiques de l’énergie.” Source: RevenueBase Database · checked Sep 20, 2026
17	Energio	Indirect evidence	FranceHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “Un bureau d’études indépendant d’ingénierie énergétique qui accompagne ses clients sur la gestion et la valorisation énergétique de leur patrimoine.” Source: RevenueBase Database · checked Sep 20, 2026
18	Ener5	Indirect evidence	Tours, FranceHQ checked Sep 20, 2026	11-50	16 contacts →
	Indirect evidence “Ener5 intègre et coordonne l’ensemble des expertises spécifiques au monde de l’énergie et de l’environnement en se situant au carrefour des enjeux majeurs pour la société…” Source: RevenueBase Database · checked Sep 20, 2026
19	BET Huguet	Indirect evidence	Nancy, FranceHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “L’énergie est notre avenir, économisons la… Ces simples mots déclinés dans de nombreuses brochures sont pourtant un vaste programme et un vrai challenge pour tous les utilisateurs…” Source: RevenueBase Database · checked Sep 20, 2026
20	ABN Engineering & Consulting	Indirect evidence	Le-chambon-feugerolles, FranceHQ checked Sep 20, 2026	1-10	14 contacts →
	Indirect evidence “Spécialiste du froid industriel, du traitement d'air et de l'optimisation énergétique, nous rendons votre développement durable.” Source: RevenueBase Database · checked Sep 20, 2026
21	BSN Engineering	Indirect evidence	Lyon, FranceHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “Découvrez BSN Engineering : l'ingénierie de pointe au service de l'énergie et de l'industrie des procédés.” Source: RevenueBase Database · checked Sep 20, 2026
22	Proteis SAS	Indirect evidence	Francheville, FranceHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “Business consulting Energy efficiency consulting for electrical processes Low energy indsutrial lighting application Life cycle machinery optimisation, leakage and waste reduction…” Source: RevenueBase Database · checked Sep 20, 2026
23	Power Conseils	Indirect evidence	Malakoff, FranceHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “Chez Power Conseils, nous sommes bien plus qu'un cabinet de courtage, mais plutôt vos partenaires dédiés, spécialisés dans la (re)négociation, l'optimisation et la sécurisation de…” Source: RevenueBase Database · checked Sep 20, 2026
24	Kallpa Énergie Solutions	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	1-10	12 contacts →
	Indirect evidence “Kallpa Energie Solutions est une société de conseil et d'ingénierie spécialisée dans la performance énergétique.” Source: RevenueBase Database · checked Sep 20, 2026
25	3e-Performance	Indirect evidence	Saint-martin-d’hères, FranceHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “Bureau d'études grenoblois créé en 2010, spécialisé dans l’optimisation de procédés et utilités et dans la décarbonation de l’industrie.” Source: RevenueBase Database · checked Sep 20, 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: natural gas optimization companies. 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 natural gas optimization companies.
Partial evidence: Its own public description names part of natural gas optimization companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name natural gas optimization companies. 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 132 natural gas optimization companies based in France

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Natural gas optimization companies based in France at a glance

As of Sep 20, 2026

19.7%Verified-email coverage

26.1Average contacts per company

1-10Median size (employees)

9.8%Largest-city concentration · Paris

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 132 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 natural gas optimization companies, 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 “natural gas optimization companies”. 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 natural gas optimization companies), 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 natural gas optimization companies, 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, 678 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 20, 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 natural gas optimization companies, 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 natural gas optimization companies are there based in France?

RevenueBase identified 132 natural gas optimization companies 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?

Atlantic Ingénierie, headquartered in Saint-Herblain, tops this list with the largest team on record.

Which city has the most natural gas optimization companies?

Paris leads with 13 headquartered companies, followed by Lyon (7) and Boulogne-Billancourt (3).

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 678 verified decision-maker contacts tracked across these 132 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 20, 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.