Company lists · Data refreshed September 2026

Top 25 Subsea engineering companies based in France

RevenueBase identified 87 company matches for subsea engineering companies associated with France as of September 2026 and tracks 1,668 professional contacts across them, including 304 with verified work emails. Marseille is the largest hub.

This list covers company matches for subsea engineering companies associated with France, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 18, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 18, 2026 How this list was built
87Companies
1,668Contacts tracked
304Verified emails
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The 25 largest subsea engineering companies based in France

Ranked by team size
Top 25 of 87 company matches for subsea engineering companies based in France, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 18, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchCassis, FranceHQ recorded Sep 18, 2026n/a216 contacts →

Exact match

“GEOCEAN is a marine work contractor, based near Marseille, in the south of France, with 30 years experience worldwide.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
2Exact matchSassenage, FranceHQ recorded Sep 18, 2026201-500170 contacts →

Exact match

“HYDROKARST joins JARNIAS GROUP!”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
3Exact matchRousset, FranceHQ recorded Sep 18, 2026201-500139 contacts →

Exact match

“Founded in 2015, ALSEAMAR, a subsidiary of the ALCEN Group, develops, designs, operates and maintains high-performance underwater solutions that meet the requirements of…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
4Exact matchLouveciennes, FranceHQ recorded Sep 18, 202651-200110 contacts →

Exact match

“Since 1992 ITP Interpipe, based in Paris and Houston, has specialized in the design, provision and fabrication of highly insulated pipelines.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
5Exact matchPlouzané, FranceHQ recorded Sep 18, 202611-5035 contacts →

Exact match

“Mare Custos is a subsea robotics company designing and manufacturing the Seabot ROV family, inspection platforms built to return structured, georeferenced data from subsea assets…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
6Exact matchPerols, FranceHQ recorded Sep 18, 202611-5028 contacts →

Exact match

“Ingénierie et services subaquatiques robotisés.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
7Exact matchParis, FranceHQ recorded Sep 18, 202611-5025 contacts →

Exact match

“Forssea Robotics is a smart ROV asset and services provider established in 2016 to increase productivity of underwater inspection and light intervention repeatable tasks.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
8Exact matchLorient, FranceHQ recorded Sep 18, 202611-5025 contacts →

Exact match

“SEABER is an innovative company that designs and manufactures highly reliable micro-AUVs, for research and commercial applications.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
9Exact matchGuérande, FranceHQ recorded Sep 18, 202611-5025 contacts →

Exact match

“GEPS Techno builds and operates autonomous, connected offshore platforms serving as persistent floating infrastructure for maritime monitoring & surveillance, along with other…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
10Exact matchL'haÿ-les-roses, FranceHQ recorded Sep 18, 202611-5025 contacts →

Exact match

“Mareal: Engineering the Future of Offshore Innovation Since its inception in 2002, Mareal has established itself as a leading force in offshore engineering, spanning the entire…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
11Exact matchDagneux, FranceHQ recorded Sep 18, 202611-5022 contacts →

Exact match

“Les travaux subaquatiques sont le cœur d’intervention des scaphandriers de Satif.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
12Exact matchFeyzin, FranceHQ recorded Sep 18, 202611-5020 contacts →

Exact match

“SUB-C MARINE est une société spécialisée dans l'inspection subaquatique par robot.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
13Exact matchSix Fours Les Plages, FranceHQ recorded Sep 18, 202611-5019 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
14Exact matchSix Fours Les Plages, FranceHQ recorded Sep 18, 20261-1017 contacts →

Exact match

“Plus de 20 années d'expérience dans les opérations maritimes - Créée par les fondateurs de Nymphea Environnement, la société MARINE TECH propose les activités suivantes-…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
15Exact matchLe Trait, FranceHQ recorded Sep 18, 202611-5013 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
16Exact matchSaint-cloud, FranceHQ recorded Sep 18, 20261-1013 contacts →

Exact match

“DV Offshore’s expertise includes floating systems, terminals, mooring systems, floating wind turbines, subsea production, pipelines & risers, allowing us to provide technical and…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
17Exact matchGondreville, FranceHQ recorded Sep 18, 202611-5013 contacts →

Exact match

“Aujourd’hui acteur majeur des travaux spéciaux dans tout le quart Nord Est de la France, T.E.S.(Travaux Entretien Subaquatiques) fut fondée en 1982 par Patrick CHAMPLON à Toul.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
18Exact matchSt-Nazaire, FranceHQ recorded Sep 18, 20261-1012 contacts →

Exact match

“Kappa Offshore Solutions is a marine engineering company specialized in offshore seismic data acquisition.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
19Exact matchNice, FranceHQ recorded Sep 18, 20261-108 contacts →

Exact match

“OFFSHORE ENGINEERING SOLUTIONS At NAUTILUS DYNAMICS, we support and provide solutions to our clients in the offshore wind, oil and gas, floating PV, ports and other coastal…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
20Exact matchMontpellier, FranceHQ recorded Sep 18, 202611-507 contacts →

Exact match

“NOVAWELL provides subsea technologies and services to the oil and gas industry, including pre-commissioning, inspection, maintenance and repair of subsea umbilicals, risers…”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
21Exact matchCaudan, FranceHQ recorded Sep 18, 202651-2007 contacts →

Exact match

“Le groupe SEA VORIAN est dédié à la conception, la réalisation, l’intégration et à la mise en œuvre d’équipements de hautes technologies dans les environnements marins.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
22Exact matchBidart, FranceHQ recorded Sep 18, 202651-2005 contacts →

Exact match

“KRAKEN is a French engineering company providing Subsea Cables Solutions.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
23Exact matchLa Ferté Saint Aubin, FranceHQ recorded Sep 18, 20261-105 contacts →

Exact match

“Société Sea-View, spécialisée en prestation hydrographique et inspection sous-marine.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
24Exact matchVannes, FranceHQ recorded Sep 18, 20261-104 contacts →

Exact match

“Keo Robotics is a start-up from Vannes that develops and manufactures innovative solutions at affordable prices for the exploration of the seabed.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase
25Exact matchNice, FranceHQ recorded Sep 18, 20261-104 contacts →

Exact match

“GeoZ Consulting is a specialized and globally focused consultancy company, offering geotechnical services and engineering project management to the offshore industry.”

Recorded in the RevenueBase company graph · Sep 18, 2026 · View company records in RevenueBase

Showing 25 of 87 subsea engineering companies based in France

See the full list, filter by size, metro and specialty, and access 304 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Subsea engineering companies based in France at a glance

As of Sep 18, 2026
18.2%Verified-email coverage
19.2Average contacts per company
1-10Median size (employees)
4.6%Largest-city concentration · Marseille
Sep 18, 2026Page data refreshed

Companies by employee count

1-10
51
11-50
21
51-200
7
201-500
4
501-1,000
1
1,001-5,000
1

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 87 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with France whose business descriptions match “subsea engineering companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 304 professional contacts with verified work emails across the full matched dataset. 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 18, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “subsea engineering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many subsea engineering companies are there based in France?

RevenueBase identified 87 company matches for subsea engineering companies associated with France as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Geocean tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most subsea engineering companies?

Marseille leads with 4 company records, followed by La Ciotat (3) and Brest (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 304 professional contacts with verified work emails tracked across these 87 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 18, 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 SmartSearch, 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.