Company lists · Data refreshed September 2026

Top 25 Marine technology companies based in France

Name: Marine technology companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 181 companies tracked

RevenueBase identified 181 marine technology companies headquartered in France as of September 2026 and tracks 5,717 professional contacts across them, including 1,568 with verified work emails. Paris is the largest hub.

This list covers marine technology companies 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 20, 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 20, 2026 86% judged on-target in blind review

181Companies

5,717Contacts tracked

1,568Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest marine technology companies based in France

Ranked by team size

Top 25 of 181 marine technology companies based in France, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to marine technology companies: 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	Chantiers DE L'atlantique	Partial evidence	Saint-nazaire, FranceHQ checked Sep 20, 2026	1,001-5,000	2,004 contacts →
	Partial evidence “Installée sur la façade Atlantique, Chantiers de l’Atlantique est une entreprise de construction maritime (paquebots, sous-stations…) et de services aux flottes.” Source: RevenueBase Database · checked Sep 20, 2026
2	Seaowl Group	Strong evidence	Levallois-perret, FranceHQ checked Sep 20, 2026	1,001-5,000	465 contacts →
	Strong evidence “SeaOwl Group is a provider of outsourcing services and technology-based solutions for Maritime, Defense and Energy industries.” Source: RevenueBase Database · checked Sep 20, 2026
3	Geocean	Partial evidence	Cassis, FranceHQ checked Sep 20, 2026	n/a	216 contacts →
	Partial evidence “GEOCEAN is a marine work contractor, based near Marseille, in the south of France, with 30 years experience worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
4	Exail Technologies EPA EXA Otcqx Exalf	Strong evidence	Paris, FranceHQ checked Sep 20, 2026	1,001-5,000	142 contacts →
	Strong evidence “Exail Technologies is a defense technology group delivering autonomous maritime drone systems and advanced navigation solutions for naval and defense customers operating in…” Source: RevenueBase Database · checked Sep 20, 2026
5	Alseamar	Indirect evidence	Rousset, FranceHQ checked Sep 20, 2026	201-500	139 contacts →
	Indirect evidence “Founded in 2015, ALSEAMAR, a subsidiary of the ALCEN Group, develops, designs, operates and maintains high-performance underwater solutions that meet the requirements of…” Source: RevenueBase Database · checked Sep 20, 2026
6	Sirehna	Indirect evidence	Bouguenais, FranceHQ checked Sep 20, 2026	51-200	113 contacts →
	Indirect evidence “SIREHNA is a subsidiary of Naval Group (French naval system integrator).” Source: RevenueBase Database · checked Sep 20, 2026
7	TSM	Partial evidence	Rouen, FranceHQ checked Sep 20, 2026	201-500	109 contacts →
	Partial evidence “TSM owns and operates 30 vessels and offers marine services to the offshore renewables industry, harbour and sea towage.” Source: RevenueBase Database · checked Sep 20, 2026
8	D-Ice Engineering	Indirect evidence	Nantes, FranceHQ checked Sep 20, 2026	11-50	49 contacts →
	Indirect evidence “We are a deeptech company based in France.” Source: RevenueBase Database · checked Sep 20, 2026
9	Kent Marine Equipment	Partial evidence	Saint-herblain, FranceHQ checked Sep 20, 2026	51-200	39 contacts →
	Partial evidence “Depuis 1974, Kent Marine Equipment accompagne les professionnels du naval et du fluvial.” Source: RevenueBase Database · checked Sep 20, 2026
10	Thalos	Partial evidence	Ploemeur, FranceHQ checked Sep 20, 2026	11-50	38 contacts →
	Partial evidence “Créateur de solutions de communication et d'outils d'analyse innovants pour le monde maritime.” Source: RevenueBase Database · checked Sep 20, 2026
11	MACOR	Indirect evidence	Marseille, FranceHQ checked Sep 20, 2026	11-50	36 contacts →
	Indirect evidence “MACOR is a company specializing in ship repair and maintenance for 40 years.” Source: RevenueBase Database · checked Sep 20, 2026
12	AMM	Partial evidence	Marseille, FranceHQ checked Sep 20, 2026	11-50	33 contacts →
	Partial evidence “4 companies, 4 fields of expertise, grouped in one place AMM Automation, Measurement, Maintenance (1985) AMM Marine Electricity (2012) AMM Control Command (2016) EMR Electric…” Source: RevenueBase Database · checked Sep 20, 2026
13	Pixel SUR MER	Indirect evidence	Lorient, FranceHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “16 years of consulting and services: mechatronic systems integration, fiber optic instrumentation, navigation, routing, hardware & software development.” Source: RevenueBase Database · checked Sep 20, 2026
14	GICAN	Partial evidence	Paris, FranceHQ checked Sep 20, 2026	11-50	31 contacts →
	Partial evidence “Le GICAN, Groupement des Industries de Construction et Activités Navales, fédère 300 industriels de la filière maritime française.” Source: RevenueBase Database · checked Sep 20, 2026
15	Furuno France	Indirect evidence	Mérignac, FranceHQ checked Sep 20, 2026	11-50	29 contacts →
	Indirect evidence “Furuno France S.A.” Source: RevenueBase Database · checked Sep 20, 2026
16	Watertracks	Indirect evidence	Perols, FranceHQ checked Sep 20, 2026	11-50	28 contacts →
	Indirect evidence “Ingénierie et services subaquatiques robotisés.” Source: RevenueBase Database · checked Sep 20, 2026
17	Foure Lagadec Marine	Indirect evidence	Le Havre, FranceHQ checked Sep 20, 2026	1,001-5,000	27 contacts →
	Indirect evidence “Héritier du savoir-faire d’ACH Engineering, l’entreprise a évolué au travers de son activité de maintenance des équipements livrés.” Source: RevenueBase Database · checked Sep 20, 2026
18	Forssea Robotics	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	11-50	25 contacts →
	Indirect evidence “Forssea Robotics is a smart ROV asset and services provider established in 2016 to increase productivity of underwater inspection and light intervention repeatable tasks.” Source: RevenueBase Database · checked Sep 20, 2026
19	Seaber	Indirect evidence	Lorient, FranceHQ checked Sep 20, 2026	11-50	25 contacts →
	Indirect evidence “SEABER is an innovative company that designs and manufactures highly reliable micro-AUVs, for research and commercial applications.” Source: RevenueBase Database · checked Sep 20, 2026
20	Atlantic Propulsion Service	Indirect evidence	St Brevin Les Pins, FranceHQ checked Sep 20, 2026	11-50	25 contacts →
	Indirect evidence “Atlantic Propulsion Service is a company based in France near the Atlantic Coast close to Saint Nazaire.” Source: RevenueBase Database · checked Sep 20, 2026
21	Geps Techno	Partial evidence	Guérande, FranceHQ checked Sep 20, 2026	11-50	25 contacts →
	Partial evidence “GEPS Techno builds and operates autonomous, connected offshore platforms serving as persistent floating infrastructure for maritime monitoring & surveillance, along with other…” Source: RevenueBase Database · checked Sep 20, 2026
22	GOIOT	Partial evidence	St Herblain, FranceHQ checked Sep 20, 2026	11-50	20 contacts →
	Partial evidence “GOIOT know-how for quality aluminium, stainless and plastics parts for marine applications is renowned since 1928.” Source: RevenueBase Database · checked Sep 20, 2026
23	D2m Engineering	Partial evidence	Six Fours Les Plages, FranceHQ checked Sep 20, 2026	11-50	19 contacts →
	Partial evidence “At d2m, our expert team of marine engineers, naval architects, and offshore contractors have been committed to crafting innovative solutions for complex maritime projects for over…” Source: RevenueBase Database · checked Sep 20, 2026
24	Delair Marine	Partial evidence	Marseille, FranceHQ checked Sep 20, 2026	11-50	19 contacts →
	Partial evidence “Delair Marine is the company behind Seasam, the world's first compact autonomous underwater drone made for professional applications.” Source: RevenueBase Database · checked Sep 20, 2026
25	CERES	Partial evidence	Montfarville, FranceHQ checked Sep 20, 2026	1-10	19 contacts →
	Partial evidence “Spécialisés dans l'acquisition et le traitement de données géophysiques marines, la plongée, la recherche et le renflouement d'épaves, la société CERES répond aux besoins de ses…” Source: RevenueBase Database · checked Sep 20, 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: marine technology companies. 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 marine technology companies.
Partial evidence: Its own public description names part of marine technology companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine technology companies. 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 181 marine technology companies based in France

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,568 reachable decision-makers.

Free signup · no credit card

View the full list →

Marine technology companies based in France at a glance

As of Sep 20, 2026

27.4%Verified-email coverage

31.6Average contacts per company

1-10Median size (employees)

4.4%Largest-city concentration · Paris

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

100

11-50

51-200

201-500

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 181 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 marine technology companies, 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 “marine technology companies”. 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 marine technology companies), 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 marine technology companies, 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, 1,568 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 20, 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 marine technology companies, 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 marine technology companies are there based in France?

RevenueBase identified 181 marine technology companies 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?

Chantiers DE L'atlantique, headquartered in Saint-Nazaire, tops this list with the largest team on record.

Which city has the most marine technology companies?

Paris leads with 8 headquartered companies, followed by Lorient (6) and Marseille (6).

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 1,568 verified decision-maker contacts tracked across these 181 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 181 marine technology companies based in France. Start with a free account, no credit card.

Download this list →

Related lists

Marine technology companies by geography

Browse the directory

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.