Company lists · Data refreshed September 2026

Top 15 Underwater structural inspection equipment based in France

RevenueBase identified 51 underwater structural inspection equipment headquartered in France as of September 2026 and tracks 329 professional contacts across them, including 69 with verified work emails. Plouzane is the largest hub.

This list covers underwater structural inspection equipment 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 22, 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 22, 2026 86% judged on-target in blind review
51Companies
329Contacts tracked
69Verified emails
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The 15 largest underwater structural inspection equipment based in France

Ranked by team size
Top 15 of 51 underwater structural inspection equipment based in France, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to underwater structural inspection equipment: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidencePlouzané, FranceHQ checked Sep 22, 202611-5035 contacts →

Strong evidence

“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…”

Source: RevenueBase Database · checked Sep 22, 2026
2Indirect evidencePerols, FranceHQ checked Sep 22, 202611-5028 contacts →

Indirect evidence

“Ingénierie et services subaquatiques robotisés.”

Source: RevenueBase Database · checked Sep 22, 2026
3Strong evidenceParis, FranceHQ checked Sep 22, 202611-5025 contacts →

Strong 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 22, 2026
4Partial evidenceFeyzin, FranceHQ checked Sep 22, 202611-5020 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 22, 2026
5Indirect evidenceMontfarville, FranceHQ checked Sep 22, 20261-1019 contacts →

Indirect 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 22, 2026
6Indirect evidenceNantes, FranceHQ checked Sep 22, 20261-1016 contacts →

Indirect evidence

“Expertise Maritime, Vente d'appareils innovants et réalisation de prestations de Contrôle non-destructif par Ultrasons,(Mesures et cartographie de corrosion des navires, citernes…”

Source: RevenueBase Database · checked Sep 22, 2026
7Indirect evidenceGondreville, FranceHQ checked Sep 22, 202611-5013 contacts →

Indirect evidence

“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.”

Source: RevenueBase Database · checked Sep 22, 2026
8Indirect evidenceSt-Nazaire, FranceHQ checked Sep 22, 20261-1012 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 22, 2026
9Partial evidenceMontpellier, FranceHQ checked Sep 22, 202611-507 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 22, 2026
10Indirect evidenceSaulce Sur Rhone, FranceHQ checked Sep 22, 202611-506 contacts →

Indirect evidence

“L'octant est spécialisé dans les opérations de maintenances et de contrôles non destructifs au service de l’industrie, particulièrement dans les secteurs naval et pétrolier.”

Source: RevenueBase Database · checked Sep 22, 2026
11Partial evidenceLa Ferté Saint Aubin, FranceHQ checked Sep 22, 20261-105 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 22, 2026
12Partial evidenceFondettes, FranceHQ checked Sep 22, 20261-103 contacts →

Partial evidence

“R&O est une entreprise d'inspection par Drones et Rov pour les professionnels.”

Source: RevenueBase Database · checked Sep 22, 2026
13Indirect evidenceVendeuvre Sur Barse, FranceHQ checked Sep 22, 20261-103 contacts →

Indirect evidence

“VIDEOCLEAN is a wholesale company based out of ZONE INDUSTRIELLE BELLEVUE, VENDEUVRE SUR BARSE, France.”

Source: RevenueBase Database · checked Sep 22, 2026
14Partial evidenceLa Baule, FranceHQ checked Sep 22, 20261-101 contacts →

Partial evidence

“EXPERTISES MARITIME PLAISANCE PRE-TRANSACTIONNELLE * Contrôles visuels et métrologiques de l'état du bateau pour naviguer en toute sécurité.* Contrôle de la structure, de la…”

Source: RevenueBase Database · checked Sep 22, 2026
15Indirect evidenceSamatan, FranceHQ checked Sep 22, 20261-101 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 22, 2026

Showing 15 of 51 underwater structural inspection equipment based in France

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Underwater structural inspection equipment based in France at a glance

As of Sep 22, 2026
21.0%Verified-email coverage
6.5Average contacts per company
1-10Median size (employees)
3.9%Largest-city concentration · Plouzane
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
38
11-50
11
51-200
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 51 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 underwater structural inspection equipment, 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 “underwater structural inspection equipment”. 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 underwater structural inspection equipment), 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 underwater structural inspection equipment, 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, 69 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 22, 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 underwater structural inspection equipment, 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 underwater structural inspection equipment are there based in France?

RevenueBase identified 51 underwater structural inspection equipment 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?

Mare Custos, headquartered in Plouzane, tops this list with the largest team on record.

Which city has the most underwater structural inspection equipment?

Plouzane leads with 2 headquartered companies, followed by Ars Sur Formans (1) and Bazoches Au Houlme (1).

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 69 verified decision-maker contacts tracked across these 51 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 22, 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.