Company lists · Data refreshed September 2026

Top 25 Architectural and engineering accounting firms based in France

Name: Architectural and engineering accounting firms based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 509 companies tracked

RevenueBase identified 509 architectural and engineering accounting firms headquartered in France as of September 2026 and tracks 2,846 professional contacts across them, including 681 with verified work emails. Paris is the largest hub.

This list covers architectural and engineering accounting 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 27, 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 27, 2026 86% judged on-target in blind review

509Companies

2,846Contacts tracked

681Verified emails

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The 25 largest architectural and engineering accounting firms based in France

Ranked by team size

Top 25 of 509 architectural and engineering accounting firms based in France, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to architectural and engineering accounting 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	Chabanne	Partial evidence	Lyon, FranceHQ checked Sep 27, 2026	51-200	129 contacts →
	Partial evidence “INCUBATEUR DE PROJETS DURABLES Chabanne est une agence d’architecture et d’ingénierie spécialiste des ouvrages complexes.” Source: RevenueBase Database · checked Sep 27, 2026
2	Aagroup Architectes	Indirect evidence	Lyon, FranceHQ checked Sep 27, 2026	51-200	101 contacts →
	Indirect evidence “Associer la force d’un groupe national à un ancrage territorial Il y a 15 ans, Philippe Canivet et Bruno Masson avaient la conviction que la croissance maîtrisée d’une agence…” Source: RevenueBase Database · checked Sep 27, 2026
3	BTP Ingénierie	Indirect evidence	Paris, FranceHQ checked Sep 27, 2026	11-50	92 contacts →
	Indirect evidence “Société à taille humaine, BTP Ingénierie est un bureau d’étude spécialisé dans le domaine du calcul de structures et du diagnostic des structures existantes.” Source: RevenueBase Database · checked Sep 27, 2026
4	Synapse Construction	Indirect evidence	Écully, FranceHQ checked Sep 27, 2026	51-200	70 contacts →
	Indirect evidence “SYNAPSE Construction, société d'ingénierie bureau d'études techniques (BET) dans les métiers du bâtiment, répond aux besoins des donneurs d'ordres publics et privés.” Source: RevenueBase Database · checked Sep 27, 2026
5	Groupe Prieur	Indirect evidence	Troyes, FranceHQ checked Sep 27, 2026	51-200	63 contacts →
	Indirect evidence “Depuis plus de 75 ans, le Groupe Prieur accompagne les particuliers et entreprises en Champagne-Ardenne et en région Parisienne.” Source: RevenueBase Database · checked Sep 27, 2026
6	ICS	Indirect evidence	Schiltigheim, FranceHQ checked Sep 27, 2026	51-200	52 contacts →
	Indirect evidence “ICS : Bien plus qu’un Expert-Comptable Fondé en 1977, ICS est un cabinet d'expertise comptable reconnu pour son sérieux, son professionnalisme et son engagement à fournir des…” Source: RevenueBase Database · checked Sep 27, 2026
7	Cetrac	Indirect evidence	Saint-herblain, FranceHQ checked Sep 27, 2026	11-50	41 contacts →
	Indirect evidence “Reconnue dans l’Ouest depuis 1974, forte d’une équipe de près de soixante collaborateurs, notre entreprise indépendante intervient en études, maîtrise d’oeuvre et ingénierie du…” Source: RevenueBase Database · checked Sep 27, 2026
8	Antefixe	Strong evidence	St.-maur-des-fossés, FranceHQ checked Sep 27, 2026	11-50	40 contacts →
	Strong evidence “ANTEFIXE is an Architectural end Engineering Association firm based in strategic two emplacement- in the Parisian area ( France ) for the European territory - in the Dubai area (…” Source: RevenueBase Database · checked Sep 27, 2026
9	Groupe Ascia	Indirect evidence	Haute Goulaine, FranceHQ checked Sep 27, 2026	51-200	39 contacts →
	Indirect evidence “Le groupe ASCIA, c'est 70 collaborateurs au sein de 5 agences de proximité - ASCIA ingénierie à HAUTE GOULAINE - IDRB à la Mouilleron le Captif - AEB à Pornichet - EBAC à Vierzon…” Source: RevenueBase Database · checked Sep 27, 2026
10	ory.architecture	Partial evidence	Paris, FranceHQ checked Sep 27, 2026	51-200	38 contacts →
	Partial evidence “ORY.architecture regroupe une soixantaine de collaborateurs et collaboratrices répartis dans différents départements opérationnels : • Le département Image et Création; véritable…” Source: RevenueBase Database · checked Sep 27, 2026
11	IDP Architectes	Indirect evidence	Toulouse, FranceHQ checked Sep 27, 2026	11-50	37 contacts →
	Indirect evidence “Depuis sa création en 2003, IDP bénéficie d’une expérience reconnue par ses clients en Métropole, aux Antilles et en Amérique du Sud.” Source: RevenueBase Database · checked Sep 27, 2026
12	Dubuisson Architecture	Partial evidence	Paris, FranceHQ checked Sep 27, 2026	11-50	36 contacts →
	Partial evidence “Dubuisson Architecture was founded in 2005 by Caroline and Thomas Dubuisson.” Source: RevenueBase Database · checked Sep 27, 2026
13	ATRIX	Partial evidence	Villeurbanne, FranceHQ checked Sep 27, 2026	51-200	21 contacts →
	Partial evidence “Atrix, groupe Egis porte des missions d’Architecture et d’Ingénierie en associant les expertises et les savoir-faire multidisciplinaires de ses filiales pour prendre en charge les…” Source: RevenueBase Database · checked Sep 27, 2026
14	ISOME	Indirect evidence	Saint-herblain, FranceHQ checked Sep 27, 2026	1-10	18 contacts →
	Indirect evidence “En associant les compétences des architectes et des ingénieurs au sein d’une même structure, ISOME est en mesure d’assurer un pilotage global des projets de rénovation de ses…” Source: RevenueBase Database · checked Sep 27, 2026
15	Extend Paris	Partial evidence	Paris, FranceHQ checked Sep 27, 2026	11-50	18 contacts →
	Partial evidence “EXTEND PARIS is an accounting company based out of 13 RUE WASHINGTON, PARIS, France.” Source: RevenueBase Database · checked Sep 27, 2026
16	Affirma	Partial evidence	Paris, FranceHQ checked Sep 27, 2026	11-50	17 contacts →
	Partial evidence “Affirma is an accounting and audit firm that offers its customers a full range of accounting services from book-keeping and preparation of payroll sheets to statutory audit…” Source: RevenueBase Database · checked Sep 27, 2026
17	Alcmea Architectes	Indirect evidence	Paris, FranceHQ checked Sep 27, 2026	11-50	16 contacts →
	Indirect evidence “Alcmea a été conçue dès son origine, en 2007, comme une plate-forme de création dynamique capable d’offrir une approche globale, depuis la conception jusqu’à la gestion de…” Source: RevenueBase Database · checked Sep 27, 2026
18	ADQUO	Indirect evidence	Grenoble, FranceHQ checked Sep 27, 2026	11-50	16 contacts →
	Indirect evidence “Bienvenue chez AdQuo, votre cabinet d'expertise comptable et de commissariat aux comptes avec des agences à Grenoble, Avignon, Valence et Chambéry.” Source: RevenueBase Database · checked Sep 27, 2026
19	Eutopia Architecture	Indirect evidence	Saint-etienne, FranceHQ checked Sep 27, 2026	11-50	16 contacts →
	Indirect evidence “L'alliance de l'architecte et de l'ingénieur nous permet de conjuguer créativité et maîtrise technique, de la conception à la réalisation.” Source: RevenueBase Database · checked Sep 27, 2026
20	Harter Architectes Associés	Partial evidence	Toulouse, FranceHQ checked Sep 27, 2026	11-50	15 contacts →
	Partial evidence “HARTER ARCHITECTURE is an architecture & planning company based out of 4 RUE DE L ORIENT, TOULOUSE, France.” Source: RevenueBase Database · checked Sep 27, 2026
21	Linkexpertises	Partial evidence	Tremblay En France, FranceHQ checked Sep 27, 2026	11-50	14 contacts →
	Partial evidence “LINKEXPERTISES is an accounting company based out of 68 T AVENUE HENRI BARBUSSE, TREMBLAY EN FRANCE, France.” Source: RevenueBase Database · checked Sep 27, 2026
22	Groupe Synthese	Indirect evidence	Arcueil, FranceHQ checked Sep 27, 2026	11-50	13 contacts →
	Indirect evidence “Le GROUPE SYNTHÈSE se forme en 1961 sous l’impulsion du cabinet Boileau-Labourdette.” Source: RevenueBase Database · checked Sep 27, 2026
23	Atelier DE LA Passerelle	Partial evidence	Lyon, FranceHQ checked Sep 27, 2026	11-50	13 contacts →
	Partial evidence “ATELIER DE LA PASSERELLE est une agence d'architecture basée à Lyon” Source: RevenueBase Database · checked Sep 27, 2026
24	Buro 3	Indirect evidence	Metz, FranceHQ checked Sep 27, 2026	1-10	13 contacts →
	Indirect evidence “BURO 3 est un cabinet d'Ingénieurs Conseils spécialisé dans la Maîtrise d'Oeuvre de conception et d'exécution en Bâtiment, le Pilotage des chantiers et le Project Management.” Source: RevenueBase Database · checked Sep 27, 2026
25	Cabinet Sacodif	Indirect evidence	Maisons-alfort, FranceHQ checked Sep 27, 2026	1-10	12 contacts →
	Indirect evidence “Cabinet d’Expertise comptable, de Commissariat aux comptes et de Conseils en Banques et Assurances.” Source: RevenueBase Database · checked Sep 27, 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: architectural and engineering accounting 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 architectural and engineering accounting firms.
Partial evidence: Its own public description names part of architectural and engineering accounting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name architectural and engineering accounting 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 509 architectural and engineering accounting firms based in France

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Architectural and engineering accounting firms based in France at a glance

As of Sep 27, 2026

23.9%Verified-email coverage

5.6Average contacts per company

1-10Median size (employees)

13.4%Largest-city concentration · Paris

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

398

11-50

51-200

201-500

501-1,000

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 509 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 architectural and engineering accounting 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 “architectural and engineering accounting 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 architectural and engineering accounting 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 architectural and engineering accounting 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, 681 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 27, 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 architectural and engineering accounting 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 architectural and engineering accounting firms are there based in France?

RevenueBase identified 509 architectural and engineering accounting 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?

Chabanne, headquartered in Lyon, tops this list with the largest team on record.

Which city has the most architectural and engineering accounting firms?

Paris leads with 68 headquartered companies, followed by Toulouse (13) and Lyon (12).

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 681 verified decision-maker contacts tracked across these 509 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 27, 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.