Company lists · Data refreshed September 2026
Top 25 Nuclear consulting firms based in France
RevenueBase identified 80 nuclear consulting firms headquartered in France as of September 2026 and tracks 28,619 professional contacts across them, including 12,105 with verified work emails and 1,356 with mobile numbers. Lyon is the largest hub.
This list covers nuclear consulting firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.
The 25 largest nuclear consulting firms based in France
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | FramatomePartial evidence | 12,439 | |||
“Framatome is an international leader in nuclear energy recognized for its innovative, digital and value added solutions for the global nuclear fleet.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 6,518 | ||||
“Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | Orano DSIndirect evidence | 1,684 | |||
“Orano DS fait partie du Groupe Orano, le fournisseur de référence du cycle du combustible nucléaire.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,664 | ||||
“Onet Technologies has 40 years of experience in the nuclear industry, with a strong expertise in engineering and services for reactor maintenance; dismantling, decommissioning and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | NUVIAIndirect evidence | 1,537 | |||
“Subsidiary of the world-leading VINCI group, NUVIA is an international company that has been operating on highly regulated and sensitive industrial sites for over 60 years.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | TechnicatomeIndirect evidence | 1,315 | |||
“TechnicAtome est spécialisée, depuis plus de 50 ans, dans la conception, la réalisation, la mise en service et le maintien en conditions opérationnelles des réacteurs nucléaires…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,079 | ||||
“À propos de SPIE Nucléaire Filiale de SPIE France, SPIE Nucléaire est le partenaire de référence multi-technique dans la conception, la réalisation, les travaux de modification…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 211 | ||||
“Partner for the nuclear industry Bilfinger has successfully supported and advised customers from the nuclear industry for decades.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 163 | ||||
“Société d’ingénierie, ECIA, une marque d'Equans, est un acteur de la filière nucléaire dans le domaine de la maîtrise des risques.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 53 | ||||
“Depuis plus de 35 ans, EAI Ingénierie accompagne les acteurs de l’Industrie en apportant son savoir-faire en gestion de projet et supervision de chantier avec une spécialisation…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 50 | ||||
“Pour répondre à la demande énergétique croissante dans le monde, setec nucléaire accompagne les acteurs du nucléaire dans le développement de leurs projets.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | Oakridge SASStrong evidence | 50 | |||
“As a privately owned Consulting company, OAKRIDGE SAS is committed to advising Nuclear projects' leaders worldwide, with no conflict of interest.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | Kury IngénierieIndirect evidence | 45 | |||
“Crée en KURY Ingénierie est un bureau d'études spécialisé dans la conception et la sûreté nucléaire.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | DE VirisIndirect evidence | 31 | |||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 24 | ||||
“Notre équipe de Consultants et d'Experts est au service des industries de Process, impliquée dans les projets de transition énergétique & décarbonation, dans des secteurs variés …” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | NucadvisorStrong evidence | 22 | |||
“NucAdvisor is a nuclear consulting company established in France by a group of senior executives and high-level experts from across the European nuclear industry.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 21 | ||||
“DEFTLINE est un groupe d’ingénierie, de conseil et de services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 18 | ||||
“Aergon is an engineering company that provides a range of nuclear industry services, in the following fields - Safety of nuclear facilities and environmental impact - Safety for…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | IFCENIndirect evidence | 16 | |||
“Le travail en environnement nucléaire exige un strict respect des comportements et des référentiels en vigueur imposés par les donneurs d'ordre.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | Sica NucléaireIndirect evidence | 15 | |||
“SICA Nucléaire est une société d'inspection, de conseil, d'audit et de formation dans le secteur de l'énergie nucléaire.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 10 | ||||
“Créée en 2012, CleanuC SAS est une TPE d’ingénierie spécialisée dans le domaine du nucléaire.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | Advise ÉnergieIndirect evidence | 10 | |||
“ADVISE ENERGIE a été créé en 2018 par 2 associés d’une expérience de plus de 20 ans sur les différentes opérations de maintenance nucléaire (maintenance spécialisée, modification…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | Advance EngineeringIndirect evidence | 6 | |||
“ADVANCE Engineering est une filiale du groupe CERAP Prévention, expert de la prévention des risques en environnement nucléaire depuis plus de 30 ans.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 | ||||
“DEMBOOST is an innovative company created in 2019 by former engineers from the French Alternative Energies and Atomic Energy Commission (CEA) who were convinced that it was…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | Team Line SolutionsStrong evidence | 3 | |||
“Our consulting firm is made up of a team of project management experts with proven experience in the nuclear, space and aeronautical fields.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 80 nuclear consulting firms based in France
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Nuclear consulting firms based in France at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 nuclear consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in France whose own description of what they do matches “nuclear consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among nuclear consulting firms, 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 an evidence 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, 12,105 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 5, 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
How many nuclear consulting firms are there based in France?
RevenueBase identified 80 nuclear consulting firms 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?
Framatome, headquartered in Courbevoie, tops this list with the largest team on record.
Which city has the most nuclear consulting firms?
Lyon leads with 5 headquartered companies, followed by Paris (5) and Pierrelatte (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 12,105 verified decision-maker contacts tracked across these 80 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 5, 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.
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