Company lists · Data refreshed September 2026

Top 25 Engineering consultancies based in Nantes, France

Name: Engineering consultancies based in Nantes, France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 88 companies tracked

RevenueBase identified 88 engineering consultancies headquartered in Nantes, France as of September 2026 and tracks 1,264 professional contacts across them, including 655 with verified work emails. Paris is the largest hub.

This list covers engineering consultancies headquartered in Nantes, 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 24, 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 24, 2026 86% judged on-target in blind review

88Companies

1,264Contacts tracked

655Verified emails

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The 25 largest engineering consultancies based in Nantes, France

Ranked by team size

Top 25 of 88 engineering consultancies based in Nantes, France, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to engineering consultancies: 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	EDEIS	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	501-1,000	475 contacts →
	Indirect evidence “Acteur de premier plan du secteur de l'ingénierie et du management d'infrastructures, le Groupe Edeis développe une vision innovante et durable, avec une promesse forte : être…” Source: RevenueBase Database · checked Sep 24, 2026
2	Saferail SAS	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	51-200	106 contacts →
	Indirect evidence “Présent depuis 2003 dans l’Ingénierie et l’Ingénierie-Conseil du Contrôle-Commande et Signalisation ferroviaire, SAFERAIL est aujourd’hui Leader dans son domaine en France.” Source: RevenueBase Database · checked Sep 24, 2026
3	Cittanova Sinopia	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	68 contacts →
	Indirect evidence “Cittànova est un bureau d’étude, de conseil et d’assistance en Urbanisme, Environnement, Architecture, Paysage et Communication.” Source: RevenueBase Database · checked Sep 24, 2026
4	Capten	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	51-200	62 contacts →
	Indirect evidence “Cabinet de conseil et d’ingénierie spécialisé dans les métiers du Système d’Information et de l’Industrie, créé en janvier 2017 à Nantes, Capten propose 3 offres afin…” Source: RevenueBase Database · checked Sep 24, 2026
5	Groupe Huit	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	54 contacts →
	Indirect evidence “Le Groupe Huit intervient depuis 1967, comme conseil auprès des gouvernements, des collectivités locales et des organismes de financement internationaux, dans plusieurs domaines…” Source: RevenueBase Database · checked Sep 24, 2026
6	Kasadenn	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	46 contacts →
	Indirect evidence “Société d'Ingénierie et de Conseil spécialisée en Génie Industriel.” Source: RevenueBase Database · checked Sep 24, 2026
7	Alteresco	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	31 contacts →
	Indirect evidence “ALTERESCO est un ensemblier qui porte des projets globaux de réhabilitation au travers de CPE (conception, travaux, exploitation, garantie de résultats).” Source: RevenueBase Database · checked Sep 24, 2026
8	AIA Environnement	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	26 contacts →
	Indirect evidence “INSPIRER NATURELLEMENT LE PROJET!” Source: RevenueBase Database · checked Sep 24, 2026
9	KERAN	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	501-1,000	22 contacts →
	Indirect evidence “Keran is an independent group composed of four companies – Sce, Creocean, Groupe Huit and Naomis – with complementary expertise and unified by shared values and ambitions.” Source: RevenueBase Database · checked Sep 24, 2026
10	Cairn Ingénierie	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	21 contacts →
	Indirect evidence “CAIRN Ingénierie (cairn-ingenierie.fr) – L’ingénierie du sens, en quelques mots : Imaginer les bâtiments de demain, en proposant une ingénierie pluridisciplinaire nourrie par…” Source: RevenueBase Database · checked Sep 24, 2026
11	Begc Concepteur DE Grandes Cuisines	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	21 contacts →
	Indirect evidence “BEGC est un Bureau d’Etudes Techniques spécialisé dans l’ingénierie et la conception de cuisines professionnelles collectives et plus largement d’espaces de restauration…” Source: RevenueBase Database · checked Sep 24, 2026
12	Natural Power France	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	201-500	19 contacts →
	Indirect evidence “Natural Power, fort d’une expertise unique de plus de 20 ans en gestion de projet, est un prestataire indépendant de conseils et services pour la valorisation des énergies…” Source: RevenueBase Database · checked Sep 24, 2026
13	Beneka	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	17 contacts →
	Indirect evidence “Mieux vaut Tête bien faite que tête bien pleine – M.” Source: RevenueBase Database · checked Sep 24, 2026
14	Eben Architecture	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	10 contacts →
	Indirect evidence “EBEN ARCHITECTURE is an architectural firm founded by Jean François ENET in 1988, then reshuffled in 1996 to create SARL Enet Dolowy, in association with Iga Dolowy, then in 2011…” Source: RevenueBase Database · checked Sep 24, 2026
15	Oppy International	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	8 contacts →
	Indirect evidence “Oppy International is a consulting firm specializing in marine projects, focusing on naval systems, maritime infrastructure, and floating structures across Europe, Canada, and…” Source: RevenueBase Database · checked Sep 24, 2026
16	Ec&u	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “Cabinet spécialisé en urbanisme commercial, EC & U conseille et accompagne depuis 2003 les enseignes et les promoteurs dans toutes les phases d’élaboration de leurs projets…” Source: RevenueBase Database · checked Sep 24, 2026
17	Ateliers Puzzle	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “ATELIERS PUZZLE est un bureau d'études spécialisé la production technique de projets artistiques et culturels.” Source: RevenueBase Database · checked Sep 24, 2026
18	Frontsign	Partial evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	5 contacts →
	Partial evidence “Façade consulting engineering” Source: RevenueBase Database · checked Sep 24, 2026
19	Herskovits & Tobie	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	5 contacts →
	Indirect evidence “H&T is a specialized naval architecture consulting firm.” Source: RevenueBase Database · checked Sep 24, 2026
20	Best Bureau D'etudes Synthèse	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “Bureau d'études nantais, nous sommes spécialisés dans les missions de synthèse, grâce à l'expérience de nos spécialistes techniques et architecturaux.” Source: RevenueBase Database · checked Sep 24, 2026
21	Amofi Etudes Programmation Concertation AMO	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “Basés à Nantes, nous sommes une société qui est née en 1995 du constat que l’acte de construire se complexifiait.” Source: RevenueBase Database · checked Sep 24, 2026
22	Opus-Création	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “Architecture et accompagnement : Création, conception et exécution des plans de votre projet Suivi de chantier et décoration : Exécution des travaux avec une exigence technique et…” Source: RevenueBase Database · checked Sep 24, 2026
23	B Cube Métal	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “B CUBE METAL est un bureau d'étude spécialisé dans les structures métalliques.” Source: RevenueBase Database · checked Sep 24, 2026
24	Flegon Ingenierie	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “FLEGON Ingénierie est un bureau d’études techniques, implanté à NANTES (44) depuis Août 2019, spécialisé dans la conception des fluides du bâtiments.” Source: RevenueBase Database · checked Sep 24, 2026
25	G-M-C	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “Conseil en Construction Assistance à Maîtrise d'Ouvrage Domaines d'intervention: Génie Civil Ferroviaire, énergétique, maritime et fluvial Charpente métallique et revêtement…” Source: RevenueBase Database · checked Sep 24, 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: engineering consultancies. 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 engineering consultancies.
Partial evidence: Its own public description names part of engineering consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering consultancies. 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 88 engineering consultancies based in Nantes, France

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Engineering consultancies based in Nantes, France at a glance

As of Sep 24, 2026

51.8%Verified-email coverage

14.4Average contacts per company

1-10Median size (employees)

751.1%Largest-city concentration · Paris

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole France list rather than for Nantes, so it is reported there. Company counts and contact totals on this page are exact for Nantes, over 88 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 engineering consultancies, 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 Nantes, France whose own description of what they do matches “engineering consultancies”. 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 engineering consultancies), 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 engineering consultancies, and records with no verified work email. Companies headquartered outside Nantes 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, 655 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 24, 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.

Engineering consultancies by metro in France

Engineering consultancies in Paris661
Engineering consultancies in Lyon192
Engineering consultancies in Toulouse105
Engineering consultancies in Nantes88
Engineering consultancies in Marseille79
Engineering consultancies in Bordeaux74
Engineering consultancies in Montpellier68
Engineering consultancies in Rennes41
Engineering consultancies in Strasbourg37
Engineering consultancies in Aix-En-Provence34
Engineering consultancies in Lille34
Engineering consultancies in Nice34
Engineering consultancies in Grenoble32
Engineering consultancies in Villeurbanne31
Engineering consultancies in Reims30
Engineering consultancies in Boulogne-Billancourt29
Engineering consultancies in Angers28
Engineering consultancies in Nimes28
Engineering consultancies in Dijon26
Engineering consultancies in Nanterre25

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 engineering consultancies, 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 engineering consultancies are there based in Nantes, France?

RevenueBase identified 88 engineering consultancies headquartered in Nantes, 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?

EDEIS, headquartered in Nantes, tops this list with the largest team on record.

Which city has the most engineering consultancies?

Paris leads with 661 headquartered companies, followed by Lyon (192) and Toulouse (105).

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 655 verified decision-maker contacts tracked across these 88 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 24, 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.