Company lists · Data refreshed September 2026

Top 25 Ocean survey technology companies based in France

Name: Ocean survey 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 88 companies tracked

RevenueBase identified 88 ocean survey technology companies headquartered in France as of September 2026 and tracks 1,255 professional contacts across them, including 327 with verified work emails. Brest is the largest hub.

This list covers ocean survey 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

88Companies

1,255Contacts tracked

327Verified emails

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The 25 largest ocean survey technology companies based in France

Ranked by team size

Top 25 of 88 ocean survey 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 ocean survey 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	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
2	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
3	Hydroconsult Sarl	Partial evidence	Kervignac, FranceHQ checked Sep 20, 2026	11-50	49 contacts →
	Partial evidence “Hydroconsult is a recognized actor in worldwide Hydrographic and Geophysical Survey's assistance and Marine Consulting, with 20 years experience.” Source: RevenueBase Database · checked Sep 20, 2026
4	Realtimeseismic	Partial evidence	Pau, FranceHQ checked Sep 20, 2026	11-50	37 contacts →
	Partial evidence “Realtimeseismic is a leading geophysics services and technology solutions company – we are passionate about innovating to bring agile, accurate geophysics solutions to our valued…” Source: RevenueBase Database · checked Sep 20, 2026
5	Mare Custos	Indirect evidence	Plouzané, FranceHQ checked Sep 20, 2026	11-50	35 contacts →
	Indirect 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 20, 2026
6	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
7	Euclyd	Indirect evidence	Bois-guillaume, FranceHQ checked Sep 20, 2026	51-200	28 contacts →
	Indirect evidence “EUCLYD Géomètres-Experts ** Levé topographique, Division de terrains, Bornage, Implantation, Plan de récolement, Copropriété, Plan d'intérieur et de façades, Levé au scanner et au…” Source: RevenueBase Database · checked Sep 20, 2026
8	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
9	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
10	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
11	Marport France	Indirect evidence	Ploemeur, FranceHQ checked Sep 20, 2026	11-50	23 contacts →
	Indirect evidence “Nous concevons et développons des capteurs de monitoring et de contrôle de prise des équipements de pêche, des echo-sondeurs, analyseurs de courants, et des sonars pour le monde…” Source: RevenueBase Database · checked Sep 20, 2026
12	COSMA	Partial evidence	Nice, FranceHQ checked Sep 20, 2026	11-50	21 contacts →
	Partial evidence “By industrializing the inventory & monitoring of benthic ecosystems, Cosma strives to contribute to the preservation of ocean biodiversity and security of our subsea…” Source: RevenueBase Database · checked Sep 20, 2026
13	Sub-C Marine	Indirect evidence	Feyzin, FranceHQ checked Sep 20, 2026	11-50	20 contacts →
	Indirect evidence “SUB-C MARINE est une société spécialisée dans l'inspection subaquatique par robot.” Source: RevenueBase Database · checked Sep 20, 2026
14	Abyssa SAS	Partial evidence	Anglet, FranceHQ checked Sep 20, 2026	1-10	19 contacts →
	Partial evidence “ABYSSA’s work involves exploring the ocean depths (up to using Autonomous Underwater Vehicles (AUVs) to carry out high-resolution seabed mapping.” Source: RevenueBase Database · checked Sep 20, 2026
15	CERES	Indirect evidence	Montfarville, FranceHQ checked Sep 20, 2026	1-10	19 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 20, 2026
16	Marine Tech	Indirect evidence	Six Fours Les Plages, FranceHQ checked Sep 20, 2026	1-10	17 contacts →
	Indirect evidence “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-…” Source: RevenueBase Database · checked Sep 20, 2026
17	Neotek	Indirect evidence	Caudan, FranceHQ checked Sep 20, 2026	11-50	16 contacts →
	Indirect evidence “Neotek est une société française détenue à 100% par Sea Vorian.” Source: RevenueBase Database · checked Sep 20, 2026
18	Akrocean	Partial evidence	Guérande, FranceHQ checked Sep 20, 2026	1-10	14 contacts →
	Partial evidence “AKROCEAN provides turnkey services for in-situ ocean data monitoring.” Source: RevenueBase Database · checked Sep 20, 2026
19	Subtop	Indirect evidence	Arpajon, FranceHQ checked Sep 20, 2026	11-50	14 contacts →
	Indirect evidence “Expert en géophysique marine et terrestre depuis 1994, Subtop propose une large gamme d’instruments et de solutions systèmes.” Source: RevenueBase Database · checked Sep 20, 2026
20	Setec Invivo	Indirect evidence	La Forêt-fouesnant, FranceHQ checked Sep 20, 2026	51-200	13 contacts →
	Indirect evidence “setec invivo intervient dès l’acquisition des données en mer, ce qui confère autonomie et efficacité.” Source: RevenueBase Database · checked Sep 20, 2026
21	Cadden	Strong evidence	Nantes, FranceHQ checked Sep 20, 2026	11-50	12 contacts →
	Strong evidence “Cadden has a long experience in developing precise navigation systems for marine applications, hydrographic surveying technology, motion sensors, Lidar, as well as in…” Source: RevenueBase Database · checked Sep 20, 2026
22	Actimar	Indirect evidence	Brest, FranceHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “Depuis plus de 20 ans, Actimar apporte son expertise au service de la mer.” Source: RevenueBase Database · checked Sep 20, 2026
23	Kappa Offshore Solutions	Indirect evidence	St-Nazaire, FranceHQ checked Sep 20, 2026	1-10	12 contacts →
	Indirect evidence “Kappa Offshore Solutions is a marine engineering company specialized in offshore seismic data acquisition.” Source: RevenueBase Database · checked Sep 20, 2026
24	Oceano VOX	Indirect evidence	Nantes, FranceHQ checked Sep 20, 2026	1-10	12 contacts →
	Indirect evidence “Oceano Vox transforms ships into connected sensors to build a global infrastructure of real-time Metocean data, serving maritime safety, maritime performance, and climate…” Source: RevenueBase Database · checked Sep 20, 2026
25	Énergie DE LA Lune	Indirect evidence	Bordeaux, FranceHQ checked Sep 20, 2026	1-10	11 contacts →
	Indirect evidence “Énergie de la Lune est un cabinet d'ingénierie spécialisé en Énergies Marines Renouvelables et en génie océanographique.” 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: ocean survey 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 ocean survey technology companies.
Partial evidence: Its own public description names part of ocean survey technology companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name ocean survey 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 88 ocean survey technology companies based in France

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Ocean survey technology companies based in France at a glance

As of Sep 20, 2026

26.1%Verified-email coverage

14.3Average contacts per company

1-10Median size (employees)

4.5%Largest-city concentration · Brest

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 88 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 ocean survey 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 “ocean survey 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 ocean survey 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 ocean survey 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, 327 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 ocean survey 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 ocean survey technology companies are there based in France?

RevenueBase identified 88 ocean survey 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?

Alseamar, headquartered in France, tops this list with the largest team on record.

Which city has the most ocean survey technology companies?

Brest leads with 4 headquartered companies, followed by Paris (4) and Nantes (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 327 verified decision-maker contacts tracked across these 88 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.

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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.