Company lists · Data refreshed September 2026

Top 25 Marine energy companies based in France

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 62 companies tracked

RevenueBase identified 62 marine energy companies headquartered in France as of September 2026 and tracks 1,559 professional contacts across them, including 625 with verified work emails. Paris is the largest hub.

This list covers marine energy 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 17, 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 17, 2026 86% judged on-target in blind review

62Companies

1,559Contacts tracked

625Verified emails

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The 25 largest marine energy companies based in France

Ranked by team size

Top 25 of 62 marine energy companies based in France, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to marine energy 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	LES Éoliennes EN MER Services	Indirect evidence	Courbevoie, FranceHQ checked Sep 17, 2026	n/a	191 contacts →
	Indirect evidence “Les Éoliennes en Mer Services, a consortium of ENGIE, EDP Renewables, Sumitomo Corporation and Caisse des Dépôts, are developing two offshore wind farm projects off the islands of…” Source: RevenueBase Database · checked Sep 17, 2026
2	Aventa	Strong evidence	Paris, FranceHQ checked Sep 17, 2026	201-500	176 contacts →
	Strong evidence “Aventa empowers the Marine Energy market with the sharpest skills to help design a bluer future.” Source: RevenueBase Database · checked Sep 17, 2026
3	EDF PEI	Indirect evidence	Paris, FranceHQ checked Sep 17, 2026	201-500	154 contacts →
	Indirect evidence “EDF PEI - Production Electrique Insulaire -est un acteur majeur de la production d’électricité dans les zones non-interconnectées.” Source: RevenueBase Database · checked Sep 17, 2026
4	Valemo	Indirect evidence	Begles, FranceHQ checked Sep 17, 2026	51-200	136 contacts →
	Indirect evidence “VALEMO est spécialisée dans l’EXPLOITATION, la MAINTENANCE et la SUPERVISION de parcs d’énergies renouvelables ON et OFFSHORE.” Source: RevenueBase Database · checked Sep 17, 2026
5	TSM	Partial evidence	Rouen, FranceHQ checked Sep 17, 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 17, 2026
6	BW Ideol	Indirect evidence	La Ciotat, FranceHQ checked Sep 17, 2026	51-200	80 contacts →
	Indirect evidence “BW Ideol is a pioneer and global leader in floating offshore wind since 2010.” Source: RevenueBase Database · checked Sep 17, 2026
7	Sweetch Energy	Partial evidence	Rennes, FranceHQ checked Sep 17, 2026	51-200	65 contacts →
	Partial evidence “Sweetch Energy is a renewable energy company pioneering osmotic power, turning the natural salinity of water into clean, 24/7, and cost-efficient electricity.” Source: RevenueBase Database · checked Sep 17, 2026
8	Oceanwings	Indirect evidence	Paris, FranceHQ checked Sep 17, 2026	11-50	64 contacts →
	Indirect evidence “OceanWings’ mission is to provide the Shipping Industry with the most efficient Wind Assisted Propulsion Systems, enabling them to reduce emissions, lower operational costs, and…” Source: RevenueBase Database · checked Sep 17, 2026
9	Oxan Energy	Strong evidence	Paris, FranceHQ checked Sep 17, 2026	11-50	30 contacts →
	Strong evidence “Oxan Energy is a developer and operator of renewable energy projects specialized in marine energies and particularly in floating offshore wind.” Source: RevenueBase Database · checked Sep 17, 2026
10	Fondation Open-C	Strong evidence	Le Croisic, FranceHQ checked Sep 17, 2026	11-50	27 contacts →
	Strong evidence “Fondation OPEN-C coordinates, develops, and manages France’s five offshore testing sites for floating wind and Marine Renewable Energies (MRE), providing infrastructures dedicated…” Source: RevenueBase Database · checked Sep 17, 2026
11	Geps Techno	Partial evidence	Guérande, FranceHQ checked Sep 17, 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 17, 2026
12	Eolink	Indirect evidence	Brest, FranceHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence “Eolink is an industrial company fully dedicated to the development of an innovative floating wind turbine, specifically designed for the floating wind sector.” Source: RevenueBase Database · checked Sep 17, 2026
13	Farwind Energy	Strong evidence	Nantes, FranceHQ checked Sep 17, 2026	11-50	23 contacts →
	Strong evidence “FARWIND ENERGY is a spin-off of Centrale Nantes, one of the world leading university for marine renewable energy research.” Source: RevenueBase Database · checked Sep 17, 2026
14	Seaturns	Partial evidence	Bordeaux, FranceHQ checked Sep 17, 2026	1-10	19 contacts →
	Partial evidence “Founded in Bordeaux, France, in 2015, SEATURNS has developed an innovative, and cost-effective wave energy solution to meet the urgent global demand for sustainable and renewable…” Source: RevenueBase Database · checked Sep 17, 2026
15	Bluefins	Indirect evidence	Brest, FranceHQ checked Sep 17, 2026	1-10	13 contacts →
	Indirect evidence “Decarbonize ocean shipping with zero-emission, whale-inspired propulsion systems Time is running out if we are to achieve net-zero emissions by 2050.” Source: RevenueBase Database · checked Sep 17, 2026
16	DV Offshore	Indirect evidence	Saint-cloud, FranceHQ checked Sep 17, 2026	1-10	13 contacts →
	Indirect evidence “DV Offshore’s expertise includes floating systems, terminals, mooring systems, floating wind turbines, subsea production, pipelines & risers, allowing us to provide technical and…” Source: RevenueBase Database · checked Sep 17, 2026
17	Kappa Offshore Solutions	Partial evidence	St-Nazaire, FranceHQ checked Sep 17, 2026	1-10	12 contacts →
	Partial evidence “Kappa Offshore Solutions is a marine engineering company specialized in offshore seismic data acquisition.” Source: RevenueBase Database · checked Sep 17, 2026
18	Solarinblue	Indirect evidence	Montpellier, FranceHQ checked Sep 17, 2026	1-10	11 contacts →
	Indirect evidence “SolarinBlue is a pioneering French company specializing in floating offshore solar power.” Source: RevenueBase Database · checked Sep 17, 2026
19	Énergie DE LA Lune	Partial evidence	Bordeaux, FranceHQ checked Sep 17, 2026	1-10	11 contacts →
	Partial evidence “Énergie de la Lune est un cabinet d'ingénierie spécialisé en Énergies Marines Renouvelables et en génie océanographique.” Source: RevenueBase Database · checked Sep 17, 2026
20	Watt&sea	Strong evidence	La Rochelle, FranceHQ checked Sep 17, 2026	1-10	9 contacts →
	Strong evidence “A pioneer in cleantech since 2009, specialising in on-board renewable energy solutions, Watt & Sea is driving the energy transition in the maritime and mobile sectors through its…” Source: RevenueBase Database · checked Sep 17, 2026
21	Nautilus Dynamics	Indirect evidence	Nice, FranceHQ checked Sep 17, 2026	1-10	8 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
22	Jifmar Group	Indirect evidence	Aix En Provence, FranceHQ checked Sep 17, 2026	201-500	7 contacts →
	Indirect evidence “Operating a modern fleet of vessels with highly qualified and seasoned personnel, Jifmar provides assistance to - Offshore Wind Farm Operators - Tidal and Wave Farm Operators -…” Source: RevenueBase Database · checked Sep 17, 2026
23	Kraken	Indirect evidence	Bidart, FranceHQ checked Sep 17, 2026	51-200	5 contacts →
	Indirect evidence “KRAKEN is a French engineering company providing Subsea Cables Solutions.” Source: RevenueBase Database · checked Sep 17, 2026
24	Eolmed	Indirect evidence	Port-la-nouvelle, FranceHQ checked Sep 17, 2026	11-50	5 contacts →
	Indirect evidence “Situé en mer Méditerranée au large de Gruissan (Aude), le parc pilote Eolmed consiste en l’implantation de trois éoliennes d’une puissance unitaire de 10 MW installées sur des…” Source: RevenueBase Database · checked Sep 17, 2026
25	Seanergy By Bluesign	Partial evidence	Issy Les Moulineaux, FranceHQ checked Sep 17, 2026	1-10	4 contacts →
	Partial evidence “Seanergy is France’s leading international event on Offshore Renewable Energy Since the results of the first calls for tender in France for offshore wind power, Seanergy has been…” Source: RevenueBase Database · checked Sep 17, 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 energy 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 energy companies.
Partial evidence: Its own public description names part of marine energy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine energy 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 62 marine energy companies based in France

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Marine energy companies based in France at a glance

As of Sep 17, 2026

40.1%Verified-email coverage

25.1Average contacts per company

1-10Median size (employees)

9.7%Largest-city concentration · Paris

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 62 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 energy 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 energy 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 energy 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 energy 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, 625 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 17, 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 energy 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 energy companies are there based in France?

RevenueBase identified 62 marine energy 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?

LES Éoliennes EN MER Services, headquartered in Cedex, tops this list with the largest team on record.

Which city has the most marine energy companies?

Paris leads with 6 headquartered companies, followed by Nantes (5) and Bordeaux (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 625 verified decision-maker contacts tracked across these 62 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 17, 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.