Company lists · Data refreshed September 2026

Top 25 Rail electrification companies based in France

Name: Rail electrification 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 418 companies tracked

RevenueBase identified 418 rail electrification companies headquartered in France as of September 2026 and tracks 8,817 professional contacts across them, including 2,838 with verified work emails. Paris is the largest hub.

This list covers rail electrification 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

418Companies

8,817Contacts tracked

2,838Verified emails

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The 25 largest rail electrification companies based in France

Ranked by team size

Top 25 of 418 rail electrification 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 rail electrification 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	TSO	Partial evidence	Chelles, FranceHQ checked Sep 17, 2026	1,001-5,000	1,109 contacts →
	Partial evidence “With more than 90 years’ experience in France and internationally, TSO (subsidiary of NGE) puts its expertise to work on: • rail services resumed between Oloron and Bedous • track…” Source: RevenueBase Database · checked Sep 17, 2026
2	Sferis	Indirect evidence	Paris, FranceHQ checked Sep 17, 2026	1,001-5,000	714 contacts →
	Indirect evidence “Date de création : Février 2012 Groupe : SNCF Directeur : M.” Source: RevenueBase Database · checked Sep 17, 2026
3	Dalkia Electrotechnics	Indirect evidence	Paris La Défense Cedex, FranceHQ checked Sep 17, 2026	1,001-5,000	347 contacts →
	Indirect evidence “Dalkia Electrotechnics entre dans une nouvelle ère et rejoint EDF business services!” Source: RevenueBase Database · checked Sep 17, 2026
4	Geismar Rail Industry Technologies & Services	Partial evidence	Colmar, FranceHQ checked Sep 17, 2026	501-1,000	327 contacts →
	Partial evidence “For almost a century, teams from Geismar have been bringing their passion and expertise to the development of rail transport.” Source: RevenueBase Database · checked Sep 17, 2026
5	Groupe Allez	Indirect evidence	Paris, FranceHQ checked Sep 17, 2026	1,001-5,000	274 contacts →
	Indirect evidence “Fondée en 1932 par Bernard Allez, la société ALLEZ s’est rapidement spécialisée dans la construction de réseaux électriques.” Source: RevenueBase Database · checked Sep 17, 2026
6	SCLE	Partial evidence	Toulouse, FranceHQ checked Sep 17, 2026	201-500	212 contacts →
	Partial evidence “Devices and systems for high-voltage substations and rail signaling” Source: RevenueBase Database · checked Sep 17, 2026
7	Sovec Groupe	Indirect evidence	Hindisheim, FranceHQ checked Sep 17, 2026	201-500	193 contacts →
	Indirect evidence “Créée en 1975, SOVEC Entreprises conçoit, réalise et maintient les installations électriques des professionnels de l’industrie, du tertiaire et du bâtiment en HT, BT, Automation…” Source: RevenueBase Database · checked Sep 17, 2026
8	Serpollet	Indirect evidence	Vénissieux, FranceHQ checked Sep 17, 2026	201-500	187 contacts →
	Indirect evidence “Entreprise phare du groupe SERFIM, SERPOLLET possède un savoir-faire de 140 ans dans le domaine des travaux publics et développe ses compétences dans la création des réseaux…” Source: RevenueBase Database · checked Sep 17, 2026
9	ATIF	Indirect evidence	St.-denis, FranceHQ checked Sep 17, 2026	51-200	176 contacts →
	Indirect evidence “NOTRE MISSION : DÉPLOYER LES RÉSEAUX FERROVIAIRES DE DEMAIN 19 ans d’expérience et de défis relevés avec nos clients sur leurs projets de déploiement de réseaux ferroviaires, ça…” Source: RevenueBase Database · checked Sep 17, 2026
10	OCY Technologies	Indirect evidence	Levallois Perret, FranceHQ checked Sep 17, 2026	51-200	139 contacts →
	Indirect evidence “OCY Technologies est une société de conseil et d’assistance technique spécialisée en ingénierie ferroviaire et dans l’énergie.” Source: RevenueBase Database · checked Sep 17, 2026
11	RTE International	Indirect evidence	Courbevoie, FranceHQ checked Sep 17, 2026	51-200	107 contacts →
	Indirect evidence “RTE international is a consultancy and engineering company whose activities cover all areas of electricity transmission.” Source: RevenueBase Database · checked Sep 17, 2026
12	Saferail SAS	Indirect evidence	Nantes, FranceHQ checked Sep 17, 2026	51-200	106 contacts →
	Indirect evidence “Présent depuis 2003 dans l’Ingénierie et l’Ingénierie-Conseil du Contrôle-Commande et Signalisation ferroviaire, SAFERAIL est aujourd’hui Leader dans son domaine en France.” Source: RevenueBase Database · checked Sep 17, 2026
13	Spie Thépault	Indirect evidence	Cergy, FranceHQ checked Sep 17, 2026	201-500	98 contacts →
	Indirect evidence “SPIE Thépault est le spécialiste historique des réseaux électriques haute tension.” Source: RevenueBase Database · checked Sep 17, 2026
14	LAFON	Indirect evidence	Tremblay-En-France, FranceHQ checked Sep 17, 2026	51-200	72 contacts →
	Indirect evidence “LAFON conçoit, installe et assure la maintenance de vos installations électriques courants forts et faibles.” Source: RevenueBase Database · checked Sep 17, 2026
15	ELO Énergie	Indirect evidence	Grandchamp Des Fontaines, FranceHQ checked Sep 17, 2026	51-200	65 contacts →
	Indirect evidence “ELO énergie est spécialiste de l'expertise, de l'ingénierie et de la construction d‘installations haute et très haute tension depuis 2006.” Source: RevenueBase Database · checked Sep 17, 2026
16	Catesis	Indirect evidence	Goussainville, FranceHQ checked Sep 17, 2026	51-200	65 contacts →
	Indirect evidence “CATESIS est une PME dynamique qualifiée par SNCF RESEAU et intervenant sur les domaines de la caténaire (Etudes d'exécutions, Travaux et Maintenance caténaire et LAC, Prestations…” Source: RevenueBase Database · checked Sep 17, 2026
17	Cide Elec	Indirect evidence	Crosne, FranceHQ checked Sep 17, 2026	51-200	63 contacts →
	Indirect evidence “Créée en 1988, Cide Elec est une entreprise d’électricité générale, leader sur le marché des services électriques en Ile-de-France (courant fort, courant faible et rénovation en…” Source: RevenueBase Database · checked Sep 17, 2026
18	Enfrasys	Indirect evidence	Rillieux-la-pape, FranceHQ checked Sep 17, 2026	51-200	63 contacts →
	Indirect evidence “Depuis plus de 40 ans, Enfrasys propose de mettre à la disposition de des projets qui lui sont confiés, son expertise des métiers de - Conception : FMDS, Conception, Avant…” Source: RevenueBase Database · checked Sep 17, 2026
19	Euptech	Indirect evidence	Meylan, FranceHQ checked Sep 17, 2026	11-50	61 contacts →
	Indirect evidence “EUPTECH vous accompagne dans la mise en place de vos Travaux Neufs, Ingénierie, Rénovation & Maintenance, en France et à l’international.” Source: RevenueBase Database · checked Sep 17, 2026
20	Lautech	Indirect evidence	Lanester, FranceHQ checked Sep 17, 2026	51-200	60 contacts →
	Indirect evidence “LAUTECH est une société du groupe ALLEZ, spécialisée dans la conception, la fabrication et la réalisation des - Postes de livraison au poste de transformation HTA/BT-…” Source: RevenueBase Database · checked Sep 17, 2026
21	ENTRA	Indirect evidence	Aubervilliers, FranceHQ checked Sep 17, 2026	51-200	53 contacts →
	Indirect evidence “Créée en 1945, la société ENTRA, filiale du Groupe SYLPA depuis 2017, ancrée historiquement sur le bassin économique de la Seine Saint Denis et du Val d'Oise, adresse ses…” Source: RevenueBase Database · checked Sep 17, 2026
22	DVF	Indirect evidence	Chevigny St Sauveur, FranceHQ checked Sep 17, 2026	51-200	49 contacts →
	Indirect evidence “DVF - Travaux Ferroviaires” Source: RevenueBase Database · checked Sep 17, 2026
23	Jean Graniou	Indirect evidence	St Laurent Du Var, FranceHQ checked Sep 17, 2026	51-200	37 contacts →
	Indirect evidence “Jean Graniou, filiale du groupe VINCI Energies, est un acteur incontournable dans le secteur de l'intégration et l'installation électrique.” Source: RevenueBase Database · checked Sep 17, 2026
24	TGSO	Indirect evidence	Redon, FranceHQ checked Sep 17, 2026	11-50	36 contacts →
	Indirect evidence “Créé en 1991, il y a plus de 30 ans, TGSO est un Bureau d’études en signalisation ferroviaire.” Source: RevenueBase Database · checked Sep 17, 2026
25	Capsim	Indirect evidence	Aix-en-provence, FranceHQ checked Sep 17, 2026	11-50	36 contacts →
	Indirect evidence “CAPSIM is your specialist partner on the behaviour of electrical networks and electrotechnical systems.” 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: rail electrification 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 rail electrification companies.
Partial evidence: Its own public description names part of rail electrification companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name rail electrification 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 418 rail electrification companies based in France

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Rail electrification companies based in France at a glance

As of Sep 17, 2026

32.2%Verified-email coverage

21.1Average contacts per company

11-50Median size (employees)

3.8%Largest-city concentration · Paris

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

173

11-50

167

51-200

201-500

501-1,000

1,001-5,000

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 418 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 rail electrification 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 “rail electrification 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 rail electrification 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 rail electrification 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, 2,838 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 rail electrification 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 rail electrification companies are there based in France?

RevenueBase identified 418 rail electrification 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?

TSO, headquartered in Chelles, tops this list with the largest team on record.

Which city has the most rail electrification companies?

Paris leads with 16 headquartered companies, followed by Lyon (4) and Toulouse (4).

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 2,838 verified decision-maker contacts tracked across these 418 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.