Company lists · Data refreshed September 2026

Top 25 Sustainable software development firms based in France

Name: Sustainable software development firms based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 514 companies tracked

RevenueBase identified 514 sustainable software development firms headquartered in France as of September 2026 and tracks 14,819 professional contacts across them, including 5,212 with verified work emails. Paris is the largest hub.

This list covers sustainable software development firms 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 29, 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 29, 2026 86% judged on-target in blind review

514Companies

14,819Contacts tracked

5,212Verified emails

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The 25 largest sustainable software development firms based in France

Ranked by team size

Top 25 of 514 sustainable software development firms based in France, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable software development 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	Groupe SII	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	10001+	4,928 contacts →
	Indirect evidence “Le groupe SII est une société d’ingénierie et de conseil en technologies (ICT) et une entreprise de services numériques (ESN) créée en 1979 par Bernard HUVÉ, ingénieur de…” Source: RevenueBase Database · checked Sep 29, 2026
2	Groupe Sigma	Indirect evidence	La Chapelle Sur Erdre, FranceHQ checked Sep 29, 2026	501-1,000	543 contacts →
	Indirect evidence “Notre ambition : créer plus de performance par le numérique à impact.” Source: RevenueBase Database · checked Sep 29, 2026
3	Greenflex	Indirect evidence	Paris, FranceHQ checked Sep 29, 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 29, 2026
4	Eodd Ingénieurs Conseils	Indirect evidence	Villeurbanne, FranceHQ checked Sep 29, 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 29, 2026
5	Iliade Consulting	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	201-500	211 contacts →
	Indirect evidence “Iliade Consulting is an IT Consulting Company specialized in the energy and water sector.” Source: RevenueBase Database · checked Sep 29, 2026
6	SWEEP	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	183 contacts →
	Partial evidence “Sweep is the enterprise sustainability data management platform trusted by the world’s leading companies and financial institutions.” Source: RevenueBase Database · checked Sep 29, 2026
7	Écosphère	Indirect evidence	St.-maurice, FranceHQ checked Sep 29, 2026	201-500	174 contacts →
	Indirect evidence “For over 35 years, Écosphère has been providing consulting and engineering services in the environmental field.” Source: RevenueBase Database · checked Sep 29, 2026
8	EVEA	Partial evidence	Nantes, FranceHQ checked Sep 29, 2026	51-200	164 contacts →
	Partial evidence “Established in 2015, EVEA is a consulting firm, a software tools publisher, and a training organization.” Source: RevenueBase Database · checked Sep 29, 2026
9	Alenia Consulting	Indirect evidence	Puteaux, FranceHQ checked Sep 29, 2026	51-200	161 contacts →
	Indirect evidence “Alenia is a Tribe of IT consultants united and inclusive.” Source: RevenueBase Database · checked Sep 29, 2026
10	R3	Indirect evidence	Paris, FranceHQ checked Sep 29, 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 29, 2026
11	SOMEI	Indirect evidence	Marseille, FranceHQ checked Sep 29, 2026	51-200	141 contacts →
	Indirect evidence “Des solutions digitales innovantes au service des métiers de l’environnement.” Source: RevenueBase Database · checked Sep 29, 2026
12	Synergis Environnement	Indirect evidence	Beaucouzé, FranceHQ checked Sep 29, 2026	51-200	131 contacts →
	Indirect evidence “Synergis Environnement est un bureau d'études indépendant spécialisé dans l'ingénierie environnementale, agricole et réglementaire.” Source: RevenueBase Database · checked Sep 29, 2026
13	IS Technologies	Indirect evidence	Courbevoie Cedex, FranceHQ checked Sep 29, 2026	n/a	127 contacts →
	Indirect evidence “IS Technologies est une société de conseils et de services en informatique basée à La Défense.” Source: RevenueBase Database · checked Sep 29, 2026
14	Weefin	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	120 contacts →
	Partial evidence “WeeFin is revolutionizing sustainable finance.” Source: RevenueBase Database · checked Sep 29, 2026
15	Soler IDE	Indirect evidence	Massy, FranceHQ checked Sep 29, 2026	51-200	115 contacts →
	Indirect evidence “SOLER IDE est l’un des leaders français du Conseil en Environnement.” Source: RevenueBase Database · checked Sep 29, 2026
16	ECO Co2	Indirect evidence	Paris, FranceHQ checked Sep 29, 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 29, 2026
17	Arolla	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	105 contacts →
	Indirect evidence “Arolla est une société de conseil spécialisée dans les techniques les plus avancées de développement logiciel : Clean Code, TDD, BDD, Legacy Remediation, style de Programmation…” Source: RevenueBase Database · checked Sep 29, 2026
18	ARP Astrance	Indirect evidence	Paris, FranceHQ checked Sep 29, 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 29, 2026
19	Groupe Isia	Indirect evidence	Saint Mathieu De Treviers, FranceHQ checked Sep 29, 2026	51-200	98 contacts →
	Indirect evidence “Si le numérique permet des gains de productivité et des innovations sans précédent, il a aussi des impacts sociaux, sociétaux et environnementaux considérables encore trop peu…” Source: RevenueBase Database · checked Sep 29, 2026
20	Nextoo	Indirect evidence	Roubaix, FranceHQ checked Sep 29, 2026	51-200	95 contacts →
	Indirect evidence “Eh non,"Développeurs de progrès", n’est pas qu'un joli slogan pour nos T-shirts; c'est une véritable philosophie.” Source: RevenueBase Database · checked Sep 29, 2026
21	Utopies	Strong evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	81 contacts →
	Strong 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 29, 2026
22	Exalt IT	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	79 contacts →
	Partial evidence “eXalt IT : là où l'expertise du Software Engineering rencontre l'audace, pour donner vie à chaque projet.” Source: RevenueBase Database · checked Sep 29, 2026
23	SERLI	Indirect evidence	Chasseneuil-du-poitou, FranceHQ checked Sep 29, 2026	51-200	78 contacts →
	Indirect evidence “If you’re looking for a team who are up to the challenges of your project, you found it!” Source: RevenueBase Database · checked Sep 29, 2026
24	New-E	Indirect evidence	Lyon, FranceHQ checked Sep 29, 2026	51-200	72 contacts →
	Indirect evidence “New-e, c'est la société de conseil opérationnel, spécialiste des métiers de la transition durable!” Source: RevenueBase Database · checked Sep 29, 2026
25	Natural Solutions	Partial evidence	Marseille, FranceHQ checked Sep 29, 2026	11-50	65 contacts →
	Partial evidence “Natural Solution is an innovative company trying to bridge the cultural gap that divides environmental scientists and software engineers.” Source: RevenueBase Database · checked Sep 29, 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: sustainable software development 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 sustainable software development firms.
Partial evidence: Its own public description names part of sustainable software development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable software development 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 514 sustainable software development firms based in France

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Sustainable software development firms based in France at a glance

As of Sep 29, 2026

35.2%Verified-email coverage

28.8Average contacts per company

1-10Median size (employees)

19.5%Largest-city concentration · Paris

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

347

11-50

110

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 514 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 sustainable software development 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 France whose own description of what they do matches “sustainable software development 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 sustainable software development 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 sustainable software development firms, 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, 5,212 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 29, 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.

Sustainable software development firms by metro

Sustainable software development firms in Paris100

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 sustainable software development 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 sustainable software development firms are there based in France?

RevenueBase identified 514 sustainable software development firms 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?

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

Which city has the most sustainable software development firms?

Paris leads with 100 headquartered companies, followed by Lyon (19) and Nantes (14).

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 5,212 verified decision-maker contacts tracked across these 514 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 29, 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.