Compagnie des Signaux
- Company typePrivate
- Founded1902
- HeadquartersParis, France
- Headcount501–1,000
- GTM typeB2B
- OfferingHardware or Manufacturing
What Compagnie des Signaux does
Compagnie des Signaux (CSEE) is a French railway signalling specialist founded in 1902 and headquartered in Les Ulis, France, with manufacturing in Riom and operations across Paris, London, Munich, and Seoul. The company designs and supplies integrated signalling systems — including the proprietary TVM 300/430 high-speed train-control systems, ERTMS Level 1 and Level 2 platforms, SEI+ and ARGOS digital interlocking with a 2-out-of-3 vital computer architecture, on-board bi-standard equipment, centralized traffic control systems, and diagnostic solutions — serving high-speed mainlines, conventional rail, and metro/tramway networks. Its installed base spans more than 7,000 km of high-speed lines and 2,000+ on-board systems across 73 countries, with 600+ high-speed trains in France running on its bi-standard ERTMS/TVM equipment.
CSEE's business model is project-based enterprise sales: it competes in competitive tenders run by state-owned railway infrastructure managers and operators (SNCF Réseau, RATP, ONCF, Network Rail, Deutsche Bahn, Eurotunnel), typically delivering multi-year contracts structured as equipment supply, system integration and installation, and ongoing preventive/corrective maintenance. Pricing is not publicly disclosed; contracts are awarded through formal tendering with rail authorities and government-to-government frameworks. CSEE has maintained the Paris Metro and Tramway signalling systems on a 24/7 basis since 1913. Following its August 1, 2024 acquisition by Italy-headquartered MERMEC Group from Hitachi — with BPI France and BNP Paribas as co-shareholders — CSEE has renewed its historic identity and is executing an active international expansion strategy across Europe, Africa, the Middle East, and Southeast Asia, anchored by recent wins on the Paris-Lyon LGV+ modernization (25% capacity increase), Kenitra-Marrakech HSL ERTMS L2 contract, and Eurotunnel Channel Tunnel modernization.
Compagnie des Signaux firmographics
Firmographics- Name
- Compagnie des Signaux
- Legal name
- La Compagnie des Signaux
- Website
- https://csignaux.com
- Company type
- Private
- Founded year
- 1902
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Ownership category
- akta.pro rank
Compagnie des Signaux industry classification
Industry- Product category
- Railway Signalling Systems
- NAICS
- Support Activities for Rail Transportation (4882)
- SIC
- Railroad Equipment (3743), Services-Computer Integrated Systems Design (7373)
- akta.pro primary industry
- Rail Signaling & Train Control Infrastructure (Interlockings, ETCS/CBTC Wayside) (TLAJADAB)
- akta.pro secondary industries
- Automatic Train Control / Protection Supervision (ATP/ETCS/PTC Oversight) (TLAJAEAC), Signaling, Train Control & Communications Construction (CBTC, Interlockings, SCADA) (IMAFAFAC), Transit Systems Integration & Commissioning (Rail Infrastructure) (IMAFAFAJ)
Keywords
Where Compagnie des Signaux is headquartered
LocationHeadquarters
- HQ city
- Paris
- HQ country
- France
- HQ region
- Europe
Offices6 records
Markets served
Compagnie des Signaux business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure, Supply Chain
Revenue model
- Railway Signalling Systems - Equipment Supply: Design, manufacturing, and supply of complete signalling systems including interlocking, train protection, and on-board equipment for new high-speed and conventional railway lines
- System Integration and Installation: Turnkey solutions including system integration, installation, testing and commissioning of signalling infrastructure
- Maintenance Services: Preventive and corrective maintenance services for metro, tramway, and railway signalling systems, including 24/7 support for Paris metro operations since 1913
- Modernisation and Upgrades: Modernisation of existing signalling infrastructure including digital upgrades of interlocking systems and ERTMS implementation
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Project-based contracts |
Go-to-market motion3 records
Distribution channels1 record
Marketing channels5 records
Compagnie des Signaux product offering
Product offeringCore offering
Compagnie des Signaux (CSEE) designs, manufactures, and integrates railway signalling systems for high-speed, conventional, metro, and tramway networks. Its core offerings include TVM 300/430 high-speed train control systems, ERTMS Level 1 & 2 interoperable signalling, SEI+ and ARGOS digital interlocking systems, onboard bi-standard TVM/ERTMS equipment, and centralized traffic control (CTC) systems, complemented by turnkey system integration, installation, commissioning, and 24/7 maintenance services. The company's solutions are deployed by railway infrastructure managers, urban transport operators, and train OEMs in 73 countries.
Product overview
Compagnie des Signaux (CSEE) is a world leader in railway high-speed signaling, providing integrated systems for passenger and freight rail networks for over 120 years. The company offers a comprehensive portfolio of signaling solutions including TVM 300 & 430 train-to-track communication systems, ERTMS Level 1 & 2 European standard systems, SEI+ and ARGOS digital interlocking systems, on-board train equipment, centralized traffic control systems, and diagnostic solutions. These products work together as an integrated signaling ecosystem: interlocking systems manage train routing and safety, TVM and ERTMS provide train protection and cab signaling, on-board equipment receives and processes trackside information, while diagnostic solutions monitor system health. In 2024, CSEE joined MERMEC Group, strengthening its international position.
Differentiator
Problem solved
Functional benefit
Products and services
- TVM 300 & TVM 430 High-Speed Signalling Systems Transmission Voie-Machine (TVM) cab-signalling systems enabling continuous speed monitoring and train protection on dedicated high-speed lines, used by railway infrastructure managers and train OEMs.
- ERTMS Level 1 & Level 2 Signalling Systems European Rail Traffic Management System-compliant signalling infrastructure enabling cross-border interoperability for railway infrastructure managers.
- SEI+ Digital Interlocking System Digital interlocking system using a 2-out-of-3 vital computer architecture, fully compatible with the latest ERTMS standard; replaces older relay interlocking to reduce train intervals and increase line capacity for high-speed and conventional networks.
- ARGOS Digital Interlocking System Digital interlocking system for modernising railway network infrastructure, first deployed on the French national rail network at Reding-Saverne.
- On-board Signalling Systems (TVM/ERTMS Bi-Standard) Train-mounted signalling equipment including bi-standard ERTMS/TVM onboard units and train protection systems supplied to high-speed train manufacturers.
- Centralized Traffic Control (CTC) Systems
Quantifiable outcome
- 25% capacity increase on Paris-Lyon high-speed line (Europe's busiest)
- +4 more outcomes
Companies that use Compagnie des Signaux
Customer profileNamed customers7 records
Segments3 records
Ideal customer profiles3 records
Compagnie des Signaux technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Compagnie des Signaux partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered flagship, supporting, strategic and core.
- Jayme Da Costa (Visabeira Group)flagshipSINALUSO consortium formed between Compagnie des Signaux and Jayme Da Costa (Visabeira Group) to provide turnkey railway signalling and telecommunications solutions in Portugal. Combines CSEE's international ERTMS expertise with Jayme Da Costa's strong local Portuguese presence, targeting Portugal's high-speed rail projects including the Porto-Vigo and Lisbon-Madrid connections.
- Business FrancesupportingBusiness France organized the Africa Forward 2026 Summit in Nairobi, facilitating CSEE's participation in the economic forum alongside French and African political leaders.
- BPI FrancesupportingBPI France co-organized the Africa Forward business forum alongside Business France and Proparco (AFD Group) as part of the bilateral summit.
- AFD (French Development Agency)supportingAFD (Agence Française de Développement) participated in Africa Forward 2026 Summit as co-organizer, facilitating French-African economic cooperation discussions in which CSEE engaged.
- HUCE (Hanoi University of Civil Engineering)strategicMOU signed during President Macron's Vietnam visit for cooperation in high-speed signalling and monitoring. Partnership focuses on engineering training, exchanges with French universities, and joint project development. Supports Vietnam's ambitions for the Hanoi-Ho Chi Minh City high-speed rail project.
- Infraestruturas de PortugalstrategicKey Portuguese infrastructure partner strengthened during Portugal Rail Summit 2025. Cooperation focused on technical collaboration in railway signalling, with support from French authorities and bilateral government agreements.
- Systra IbericacoreEngineering consultancy partner for railway projects, particularly noted at Portugal Rail Summit 2025. SYSTRA provides technical expertise alongside CSEE in major rail infrastructure projects.
- SITE S.p.A.flagshipSITE S.p.A. provides telecommunications networks including cybersecurity and power supply systems as part of the consortium with CSEE and GCF for the Kenitra-Marrakech high-speed line project. SITE has over 75 years of experience in railway telecommunications, cybersecurity, ICT, energy and technological installations.
- GCF S.p.A. (Generale Costruzioni Ferroviarie)flagshipGCF S.p.A. handles equipment installation for the Kenitra-Marrakech high-speed line project. Founded in 1950, GCF is a leading railway construction company specializing in track laying, electrification, and railway signalling, with 18 offices across Italy and internationally.
- EiffagecoreEiffage is a key partner in the ARGOS digital interlocking project at Reding-Saverne, commissioned November 2025. Partnership involves complex systems modernization on the French national railway network.
- SYSTRAcoreSYSTRA is a strategic partner in major French railway modernization projects including RER D modernization at Paris-Lyon underground station and ARGOS digital interlocking at Reding-Saverne.
Scale indicators10 records
Recent moves7 records
Expansion highlights6 records
Compagnie des Signaux competitors and assessment
Company assessmentDirect peers
- Alstom: Alstom offers the Atlas digital interlocking, Urbalis CBTC, and ETCS solutions; competes head-to-head with CSEE on French, Spanish, and African high-speed signaling projects and shares similar state-aligned export ambitions.
- Thales: Thales Transportation sells SelTrac CBTC for metros and ETCS wayside/on-board for mainline rail, directly overlapping CSEE's urban (RATP) and mainline (SNCF, Network Rail) signaling footprint.
- Hitachi Rail: Hitachi Rail (formerly Ansaldo STS) is CSEE's direct ETCS/digital interlocking competitor and was its corporate parent until the August 2024 divestiture to MERMEC; competes for the same European HSL and metro tenders.
- MERMEC Group: MERMEC Group acquired CSEE in August 2024 and operates an overlapping rail diagnostics, signaling, and infrastructure portfolio; functions as both parent and a sibling-platform peer in track measurement and rail digitalization.
- Siemens Mobility: Siemens Mobility is the leading global supplier of ETCS/ERTMS wayside and on-board equipment, digital interlockings, and CBTC metro signaling — directly competing with CSEE on European HSL and urban rail tenders including Deutsche Bahn's €6.3B program.
Broad incumbents
- Wabtec Corporation: Wabtec is a broad rail equipment incumbent with signaling, PTC, and digital solutions for freight and transit; addresses overlapping operator needs but does not specialize in European ERTMS wayside signaling like CSEE.
- CRRC Corporation: CRRC is China's state-owned rail conglomerate covering rolling stock, CBTC, and CTC signaling; competes with CSEE on Belt & Road-initiated HSL projects in Africa, the Middle East, and Southeast Asia.
Emerging players
- Stadler Rail: Stadler is primarily a rolling stock manufacturer but increasingly bundles signaling and driverless train control solutions, partially overlapping CSEE's metro and commuter rail scope.
- Indra (Mobility): Indra's Mobility division (formerly Dimetronic/Thales Spain) supplies ERTMS/ETCS, interlocking, and traffic management for European operators; a smaller but technically credible challenger to CSEE on Spanish and Latin American rail tenders.
Others
- Huawei (Rail ICT/FRMCS): Huawei supplies FRMCS/GSM-R rail telecommunications, LTE-R, and onboard ICT infrastructure that complements ERTMS signaling — a supplier-side peer adjacent to CSEE's ecosystem where SITE S.p.A. already partners on Moroccan telecom scope.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
Compagnie des Signaux social profiles
Digital presenceCompagnie des Signaux financial estimates
Financial estimateRevenue estimate
Valuation estimate
Compagnie des Signaux leadership team
Management profileNumber of profiles
Profiles1 record
Compagnie des Signaux subsidiaries and ownership
Company hierarchySubsidiaries3 records
Compagnie des Signaux funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Compagnie des Signaux M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Compagnie des Signaux
What does Compagnie des Signaux do?
Compagnie des Signaux (CSEE) designs, manufactures, and integrates railway signalling systems for high-speed, conventional, metro, and tramway networks. Its core offerings include TVM 300/430 high-speed train control systems, ERTMS Level 1 & 2 interoperable signalling, SEI+ and ARGOS digital interlocking systems, onboard bi-standard TVM/ERTMS equipment, and centralized traffic control (CTC) systems, complemented by turnkey system integration, installation, commissioning, and 24/7 maintenance services. The company's solutions are deployed by railway infrastructure managers, urban transport operators, and train OEMs in 73 countries.
Is Compagnie des Signaux a public or private company?
Compagnie des Signaux is a private company. It is classified as corporate owned and is currently operating.
When was Compagnie des Signaux founded?
Compagnie des Signaux was founded in 1902. It employs 501 to 1,000 people.
Where is Compagnie des Signaux based?
Compagnie des Signaux is headquartered in Paris, France, in the Europe region.
How does Compagnie des Signaux make money?
Four revenue lines are on record. Railway Signalling Systems - Equipment Supply is the primary driver. The others are system Integration and Installation, maintenance Services and modernisation and Upgrades.
Who are Compagnie des Signaux's main competitors?
Direct peers on record are Alstom, Thales, Hitachi Rail, MERMEC Group and Siemens Mobility. Broad incumbents are Wabtec Corporation and CRRC Corporation. Emerging players are Stadler Rail and Indra (Mobility). Huawei (Rail ICT/FRMCS) is listed as an others.
Does Compagnie des Signaux have an API?
No public API is recorded for Compagnie des Signaux.
What industry is Compagnie des Signaux in?
Compagnie des Signaux's product category is Railway Signalling Systems. Its primary akta.pro industry code is TLAJADAB, Rail Signaling & Train Control Infrastructure (Interlockings, ETCS/CBTC Wayside), with a secondary code of TLAJAEAC, Automatic Train Control / Protection Supervision (ATP/ETCS/PTC Oversight). Its NAICS code is 4882 and its SIC code is 3743.