Company lists · Data refreshed September 2026

Top 25 Decarbonization consulting firms based in Paris, France

Name: Decarbonization consulting firms based in Paris, France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 218 companies tracked

RevenueBase identified 218 decarbonization consulting firms headquartered in Paris, France as of September 2026 and tracks 3,105 professional contacts across them, including 1,413 with verified work emails. Across France, Paris is the largest hub for this category.

This list covers decarbonization consulting firms headquartered in Paris, 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

218Companies

3,105Contacts tracked

1,413Verified emails

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The 25 largest decarbonization consulting firms based in Paris, France

Ranked by team size

Top 25 of 218 decarbonization consulting firms based in Paris, France, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to decarbonization consulting 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	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
2	Carbone 4	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	208 contacts →
	Partial 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
3	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
4	ARP Astrance	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	105 contacts →
	Indirect evidence “Aujourd’hui ARP Astrance regroupe plus de 100 collaborateurs et intervient en tant que conseil, AMO, project manager, BE environnement, écologue sur les projets en développement…” Source: RevenueBase Database · checked Sep 28, 2026
5	Sinteo	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	96 contacts →
	Indirect evidence “Depuis 2008, nous accompagnons nos clients dans la triple révolution – environnementale, digitale et des usages – qui bouleverse l’immobilier.” Source: RevenueBase Database · checked Sep 28, 2026
6	ROZO	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	89 contacts →
	Indirect evidence “ROZO - Votre partenaire pour une décarbonation réussie!” Source: RevenueBase Database · checked Sep 28, 2026
7	Lamarck Group	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	201-500	86 contacts →
	Indirect evidence “Lamarck est un groupe de conseil en transformation des entreprises.” Source: RevenueBase Database · checked Sep 28, 2026
8	Utopies	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	81 contacts →
	Partial evidence “UTOPIES is the top French consulting firm dedicated exclusively, since its creation in 1993, to the promotion of sustainable development through consulting and think tank…” Source: RevenueBase Database · checked Sep 28, 2026
9	Métiga	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	81 contacts →
	Indirect evidence “MÉTIGA est une entreprise à mission, engagée en faveur de la transition énergétique, environnementale et sociétale.” Source: RevenueBase Database · checked Sep 28, 2026
10	SAMI	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	76 contacts →
	Indirect evidence “Sami: Smart.” Source: RevenueBase Database · checked Sep 28, 2026
11	Co2 AI	Indirect evidence	Paris, FranceHQ checked Sep 28, 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 28, 2026
12	Aktio Apave Group	Indirect evidence	Paris, FranceHQ checked Sep 28, 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 28, 2026
13	Erese Groupe Scet HTC	Indirect evidence	Paris, FranceHQ checked Sep 28, 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 28, 2026
14	ACE Energie	Indirect evidence	Paris, FranceHQ checked Sep 28, 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 28, 2026
15	E-Cube Strategy Consultants	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	43 contacts →
	Partial evidence “E-CUBE, the strategy consulting firm dedicated to energy, transport and climate stakes We combine innovative strategic thinking with deep industry expertise to deliver outstanding…” Source: RevenueBase Database · checked Sep 28, 2026
16	Climateseed	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	40 contacts →
	Partial evidence “ClimateSeed combines strategic consulting and digital platforms to help organizations design and deploy ambitious climate strategies.” Source: RevenueBase Database · checked Sep 28, 2026
17	AKTEO	Indirect evidence	Paris, FranceHQ checked Sep 28, 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 28, 2026
18	NAMR	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	40 contacts →
	Indirect evidence “Notre mission Permettre la transformation énergétique et l’adaptation climatique des territoires, des actifs et des systèmes énergétiques en France et à l’international grâce à…” Source: RevenueBase Database · checked Sep 28, 2026
19	Omnegy By Epsa	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	34 contacts →
	Indirect evidence “OMNEGY est un cabinet de conseil en énergie pour les entreprises, spécialiste des achats et des contrats d'énergie.” Source: RevenueBase Database · checked Sep 28, 2026
20	Carbometrix	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	32 contacts →
	Partial evidence “Carbometrix guides private-market professionals and their portfolio companies in effective decarbonization.” Source: RevenueBase Database · checked Sep 28, 2026
21	Wild Trees	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	27 contacts →
	Indirect evidence “WILD TREES est une société de conseil indépendante, spécialiste des enjeux écologiques, énergétiques et climatiques.” Source: RevenueBase Database · checked Sep 28, 2026
22	Carbon Maps	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “Carbon Maps is the sustainability and decarbonization platform for the food and beverage industry.” Source: RevenueBase Database · checked Sep 28, 2026
23	NOOCO	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “Nooco est une société d’édition de logiciel SaaS qui permet de connaître puis d’optimiser l’empreinte carbone d’un projet de construction depuis son étude, en agissant sur les…” Source: RevenueBase Database · checked Sep 28, 2026
24	DT Master Carbon	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “We accompany companies along the whole net-zero journey.” Source: RevenueBase Database · checked Sep 28, 2026
25	Atlante	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “Atlante & Cie est un cabinet de conseil en stratégie opérationnelle dédié aux enjeux énergétiques.” 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 consulting 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 decarbonization consulting firms.
Partial evidence: Its own public description names part of decarbonization consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name decarbonization consulting 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 218 decarbonization consulting firms based in Paris, France

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Decarbonization consulting firms based in Paris, France at a glance

As of Sep 28, 2026

45.5%Verified-email coverage

14.2Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

143

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole France list rather than for Paris, so it is reported there. Company counts and contact totals on this page are exact for Paris, over 218 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 consulting 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 Paris, France whose own description of what they do matches “decarbonization consulting 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 decarbonization consulting 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 decarbonization consulting firms, and records with no verified work email. Companies headquartered outside Paris 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, 1,413 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 consulting firms by metro in France

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 consulting 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 decarbonization consulting firms are there based in Paris, France?

RevenueBase identified 218 decarbonization consulting firms headquartered in Paris, 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?

Greenflex, headquartered in Paris, tops this list with the largest team on record.

Which city in France has the most decarbonization consulting firms?

Paris leads France with 218 headquartered companies, followed by Lyon (57) and Toulouse (27).

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 1,413 verified decision-maker contacts tracked across these 218 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.