Company lists · Data refreshed September 2026

Top 25 Contract assembly manufacturers based in France

Name: Contract assembly manufacturers based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 179 companies tracked

RevenueBase identified 179 contract assembly manufacturers headquartered in France as of September 2026 and tracks 4,008 professional contacts across them, including 948 with verified work emails. Paris is the largest hub.

This list covers contract assembly manufacturers 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

179Companies

4,008Contacts tracked

948Verified emails

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The 25 largest contract assembly manufacturers based in France

Ranked by team size

Top 25 of 179 contract assembly manufacturers 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 contract assembly manufacturers: 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	Asteelflash	Indirect evidence	St.-cloud, FranceHQ checked Sep 16, 2026	5,001-10,000	1,534 contacts →
	Indirect evidence “Asteelflash is a global leader in Electronic Manufacturing Services (EMS) and Supply-Chain Management solutions, part of USI (SSE: 601231), Universal Scientific Industrial…” Source: RevenueBase Database · checked Sep 16, 2026
2	OSE Group	Indirect evidence	Angers, FranceHQ checked Sep 16, 2026	201-500	194 contacts →
	Indirect evidence “For more than 30 years, we have been working alongside you to bring you a global solution with ever more innovation.” Source: RevenueBase Database · checked Sep 16, 2026
3	Neyret Group GUY Neyret SA & Lagniel SA & Neyret INC	Strong evidence	Chaponost, FranceHQ checked Sep 16, 2026	201-500	129 contacts →
	Strong evidence “The Neyret Group is a major player recognized worldwide as one of the greatest manufacturer of customized assembly, test and print machines with an accumulated know how of more…” Source: RevenueBase Database · checked Sep 16, 2026
4	Chastagner	Indirect evidence	La Ferté Bernard, FranceHQ checked Sep 16, 2026	51-200	89 contacts →
	Indirect evidence “Basé en Pays de Loire, au cœur d'une des plus grandes régions industrielles de France, Chastagner conjugue depuis plus de 70 ans savoir-faire industriel, curiosité technologique…” Source: RevenueBase Database · checked Sep 16, 2026
5	Selva Electronique	Partial evidence	Vallet, FranceHQ checked Sep 16, 2026	51-200	59 contacts →
	Partial evidence “Selva, implantée à Vallet & Chalon-sur-Saône, est spécialisée dans la conception, la fabrication et l'assemblage de cartes électroniques.” Source: RevenueBase Database · checked Sep 16, 2026
6	R&d Technology	Indirect evidence	Monswiller, FranceHQ checked Sep 16, 2026	51-200	52 contacts →
	Indirect evidence “Le Groupe R&D Technology est un acteur de référence pour le déploiement de solutions industrielles innovantes.” Source: RevenueBase Database · checked Sep 16, 2026
7	CMS Industrie	Indirect evidence	Saint Foy L'argentière, FranceHQ checked Sep 16, 2026	51-200	29 contacts →
	Indirect evidence “CMS Industrie, votre partenaire en Electronique.” Source: RevenueBase Database · checked Sep 16, 2026
8	Altitude Industrie	Partial evidence	Vinzelles, FranceHQ checked Sep 16, 2026	11-50	28 contacts →
	Partial evidence “ALTITUDE INDUSTRIE provides its expertise for your subcontracting projects in precision machining and assembly.” Source: RevenueBase Database · checked Sep 16, 2026
9	DGC Industries	Partial evidence	Magland, FranceHQ checked Sep 16, 2026	11-50	24 contacts →
	Partial evidence “Our expertise in traditional bar turning, CNC machining, and co-design, associated with a modern machinery enables us to manufacture a wide array of mechanical parts, from Ø2mm up…” Source: RevenueBase Database · checked Sep 16, 2026
10	Seeb Industrie	Indirect evidence	Chauffailles, FranceHQ checked Sep 16, 2026	51-200	22 contacts →
	Indirect evidence “De la conception à la mise en production, SEEB INDUSTRIE vous accompagne dans la réalisation de vos sous-ensembles et ensembles complets ainsi que dans l’usinage de pièces à forte…” Source: RevenueBase Database · checked Sep 16, 2026
11	Mecasoka	Indirect evidence	Saint-laurent-blangy, FranceHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “MECASOKA is a mechanical or industrial engineering company based out of 785 Boulevard Jules César, 6223 Saint-Laurent-Blangy, France.” Source: RevenueBase Database · checked Sep 16, 2026
12	Cenats	Partial evidence	Châtillon-le-duc, FranceHQ checked Sep 16, 2026	11-50	20 contacts →
	Partial evidence “En combinant nos savoir-faire en usinage, assemblage et procédés spéciaux, Cenats réalise des pièces et des ensembles mécaniques de précision de l’unitaire à la moyenne série.” Source: RevenueBase Database · checked Sep 16, 2026
13	E.S.P.A.C.E	Indirect evidence	Saint-andré-des-eaux, FranceHQ checked Sep 16, 2026	51-200	20 contacts →
	Indirect evidence “Depuis plus de 30 ans, la société E.S.P.A.C.E.” Source: RevenueBase Database · checked Sep 16, 2026
14	Acea EMS	Partial evidence	Gundershoffen, FranceHQ checked Sep 16, 2026	51-200	19 contacts →
	Partial evidence “At the heart of Europa, ACEA is your partner for industrialization, electronic board equipment and installation of assemblies and sub-assemblies.” Source: RevenueBase Database · checked Sep 16, 2026
15	Project Usinage ET Integration	Indirect evidence	Vendome, FranceHQ checked Sep 16, 2026	51-200	18 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
16	ERTOP	Indirect evidence	Joigny, FranceHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect evidence “Depuis sa création en 1984, ERTOP pour Etude et Réalisation de TÔlerie de Précision, s'est imposée comme un acteur clé dans le domaine de la tôlerie fine et de la gestion de…” Source: RevenueBase Database · checked Sep 16, 2026
17	Arvelec - AEL Groupe	Indirect evidence	Marignier, FranceHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect evidence “French subcontractor ISO 9001-2015 qualified for electronics manufacturing services (EMS), we are involved in the wiring of PCBs (SMD [0201 & BGA] and through components…” Source: RevenueBase Database · checked Sep 16, 2026
18	Sudelec Usson EN Forez - 42550	Indirect evidence	Usson En Forez, FranceHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “SUDELEC est un partenaire privilégié pour la fabrication de vos cartes et ensembles électroniques.” Source: RevenueBase Database · checked Sep 16, 2026
19	Cera Electronique	Indirect evidence	Val De Reuil, FranceHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “CERA ELECTRONIQUE, présente sur le marché de la sous-traitance électronique depuis ses débuts, a été créée pour assurer la production d’électroniques pour le Groupe ACCEDIA…” Source: RevenueBase Database · checked Sep 16, 2026
20	Nordtole	Indirect evidence	Saint-amand-les-eaux, FranceHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “DE LA CO-CONCEPTION ET LA RÉALISATION FINALE Assistance du client dans le développement d’un nouveau produit, Fabrication avec toutes les opérations de valeur ajoutée : découpe…” Source: RevenueBase Database · checked Sep 16, 2026
21	Groupe Arbm	Indirect evidence	Chemillé-en-anjou, FranceHQ checked Sep 16, 2026	51-200	15 contacts →
	Indirect evidence “Créée en 1997, la société Ouest Décolletage n'a cessé de se développer et de progresser dans son coeur de métier : le décolletage (spécialisée dans la fabrication de pièces…” Source: RevenueBase Database · checked Sep 16, 2026
22	Société Mécanique Pansu	Indirect evidence	Beaumont-lès-valence, FranceHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect evidence “SMP (Société de Mécanique Pansu) est spécialisée dans la sous-traitance de réalisation de pièces mécaniques par usinage et de montage d’ensembles.” Source: RevenueBase Database · checked Sep 16, 2026
23	Groupe EIA	Indirect evidence	Apprieu, FranceHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “Groupe EIA : Votre partenaire de confiance en sous-traitance électronique depuis 1985.” Source: RevenueBase Database · checked Sep 16, 2026
24	Simeto	Indirect evidence	Segre En Anjou Bleu, FranceHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “L'entreprise SIMETO, filiale du groupe familial STEMAN, est une société de 35 personnes, crée en et spécialisée dans la mécanique de précision, la tôlerie fine, l’intégration et…” Source: RevenueBase Database · checked Sep 16, 2026
25	Usimeca - Atcbe	Indirect evidence	Ormes, FranceHQ checked Sep 16, 2026	11-50	12 contacts →
	Indirect evidence “À l’origine, USIMECA est une entreprise de mécanique de précision basée à Beaugency.” 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: contract assembly manufacturers. 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 contract assembly manufacturers.
Partial evidence: Its own public description names part of contract assembly manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name contract assembly manufacturers. 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 179 contract assembly manufacturers based in France

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Contract assembly manufacturers based in France at a glance

As of Sep 16, 2026

23.7%Verified-email coverage

22.4Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · Paris

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

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 179 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 contract assembly manufacturers, 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 “contract assembly manufacturers”. 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 contract assembly manufacturers), 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 contract assembly manufacturers, 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, 948 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.

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 contract assembly manufacturers, 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 contract assembly manufacturers are there based in France?

RevenueBase identified 179 contract assembly manufacturers 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?

Asteelflash, headquartered in St.-Cloud, tops this list with the largest team on record.

Which city has the most contract assembly manufacturers?

Paris leads with 5 headquartered companies, followed by La Ferte Bernard (3) and Magland (3).

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 948 verified decision-maker contacts tracked across these 179 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.