Company lists · Data refreshed September 2026

Top 25 Smart city decarbonization companies based in France

Name: Smart city decarbonization companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 144 companies tracked

RevenueBase identified 144 smart city decarbonization companies headquartered in France as of September 2026 and tracks 18,922 professional contacts across them, including 3,337 with verified work emails. Paris is the largest hub.

This list covers smart city decarbonization 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 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

144Companies

18,922Contacts tracked

3,337Verified emails

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The 25 largest smart city decarbonization companies based in France

Ranked by team size

Top 25 of 144 smart city decarbonization companies 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 smart city decarbonization 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	Engie Solutions France	Indirect evidence	La Garenne-colombes, FranceHQ checked Sep 16, 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 16, 2026
2	Greenyellow	Indirect evidence	Puteaux, FranceHQ checked Sep 16, 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 16, 2026
3	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
4	Energy Pool	Partial evidence	Le Bourget Du Lac, FranceHQ checked Sep 16, 2026	51-200	300 contacts →
	Partial 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 16, 2026
5	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
6	ECO Co2	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	109 contacts →
	Indirect evidence “Eco CO2 se positionne sur le marché de l'environnement et du développement durable.” Source: RevenueBase Database · checked Sep 16, 2026
7	Co2 AI	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	51-200	63 contacts →
	Indirect evidence “CO2 AI helps large and complex organizations measure their environmental impact, identify credible levers, and decarbonize at scale, leveraging the power of AI.” Source: RevenueBase Database · checked Sep 16, 2026
8	Aktio Apave Group	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	51-200	63 contacts →
	Indirect evidence “Our mission : Aktio supports companies in their low-carbon transition, with our carbon footprint platform, our expertise and our network of partners to reduce emissions.” Source: RevenueBase Database · checked Sep 16, 2026
9	Efficacity	Indirect evidence	Champs-sur-marne, FranceHQ checked Sep 16, 2026	51-200	60 contacts →
	Indirect evidence “Depuis sa création en 2014, la raison d'être d'Efficacity est d’apporter aux acteurs de terrain de nouveaux outils, méthodes et solutions opérationnelles qui leur permettront…” Source: RevenueBase Database · checked Sep 16, 2026
10	Groupe Herve S.A	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	1,001-5,000	57 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
11	Ecogreenenergy	Indirect evidence	Strasbourg, FranceHQ checked Sep 16, 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 16, 2026
12	Sobre Energie	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	53 contacts →
	Indirect 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
13	Qinomic	Indirect evidence	Venelles, FranceHQ checked Sep 16, 2026	11-50	46 contacts →
	Indirect evidence “Qinomic conçoit, industrialise et commercialise des solutions de rétrofit électriques pourune mobilité décarbonée.” Source: RevenueBase Database · checked Sep 16, 2026
14	AKTEO	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	40 contacts →
	Indirect evidence “AKTEO est la société de conseil, d’ingénierie et de formation en décarbonation.” Source: RevenueBase Database · checked Sep 16, 2026
15	EON Business Solutions France	Indirect evidence	Levallois Perret, FranceHQ checked Sep 16, 2026	11-50	33 contacts →
	Indirect evidence “E.ON Business Solutions fournit des solutions intelligentes d’efficacité énergétique à des clients industriels, tertiaires ou publics.” Source: RevenueBase Database · checked Sep 16, 2026
16	Carbometrix	Partial evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	32 contacts →
	Partial evidence “Carbometrix guides private-market professionals and their portfolio companies in effective decarbonization.” Source: RevenueBase Database · checked Sep 16, 2026
17	Tilt Energy	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	26 contacts →
	Indirect evidence “Tilt Energy is one of Europe’s pioneering AI-driven demand-side electricity flexibility platforms.” Source: RevenueBase Database · checked Sep 16, 2026
18	Caillou Vert Conseil	Indirect evidence	La Rochelle, FranceHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “Entreprise à impact contribuant à atteindre la neutralité carbone.” Source: RevenueBase Database · checked Sep 16, 2026
19	Nelson	Indirect evidence	Paris, FranceHQ checked Sep 16, 2026	1-10	23 contacts →
	Indirect evidence “We help companies reduce their carbon footprints, control their mobility costs and use energy more efficiently.” Source: RevenueBase Database · checked Sep 16, 2026
20	Save Energies	Indirect evidence	Boulogne Billancourt, FranceHQ checked Sep 16, 2026	11-50	20 contacts →
	Indirect evidence “Créée en 2011, initialement pour satisfaire les besoins internes, Save Énergies a évolué pour proposer des solutions d’accès aux marchés de l’énergie à tous types de clients …” Source: RevenueBase Database · checked Sep 16, 2026
21	Symphonics	Indirect evidence	Tours, FranceHQ checked Sep 16, 2026	1-10	19 contacts →
	Indirect evidence “Symphonics une offre innovante de services énergétiques pour les particuliers et les professionnels.” Source: RevenueBase Database · checked Sep 16, 2026
22	Altens	Indirect evidence	La Rochelle, FranceHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “Altens, partenaire de votre transition énergétique!” Source: RevenueBase Database · checked Sep 16, 2026
23	Ingélib	Indirect evidence	Paris La Défense, FranceHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “Ingélib is an independent French engineering and consultancy firm founded in 2017, specialising in the decarbonised energy sector.” Source: RevenueBase Database · checked Sep 16, 2026
24	Kyotherm	Partial evidence	Paris, FranceHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “Kyotherm is an infrastructure investment platform dedicated to financing and acquiring decarbonization infrastructure assets.” Source: RevenueBase Database · checked Sep 16, 2026
25	Optera	Indirect evidence	Bidart, FranceHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “Optera développe des solutions innovantes pour aider les gestionnaires de bâtiments à réduire leurs coûts énergétiques et leur impact carbone- Solution de monitoring - Gestion…” 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: smart city decarbonization 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 smart city decarbonization companies.
Partial evidence: Its own public description names part of smart city decarbonization companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name smart city decarbonization 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 144 smart city decarbonization companies based in France

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Smart city decarbonization companies based in France at a glance

As of Sep 16, 2026

17.6%Verified-email coverage

131.4Average contacts per company

1-10Median size (employees)

29.2%Largest-city concentration · Paris

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 144 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 smart city decarbonization 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 “smart city decarbonization 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 smart city decarbonization 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 smart city decarbonization 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, 3,337 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.

Smart city decarbonization companies by metro

Smart city decarbonization companies in Paris42

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 smart city decarbonization 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 smart city decarbonization companies are there based in France?

RevenueBase identified 144 smart city decarbonization 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?

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

Which city has the most smart city decarbonization companies?

Paris leads with 42 headquartered companies, followed by Lyon (10) and Courbevoie (4).

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 3,337 verified decision-maker contacts tracked across these 144 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.