CLEARSY
The CLEARSY company
CLEARSY was founded on January 1, 2001 by the team of engineers responsible for the industrialisation of the formal modelling tool called Atelier B, used in the railway sector to produce safety software.
CLEARSY: safety systems engineering
We are a French SME, specialised in the realisation of safety systems and software from level SIL1 to SIL4. We develop complex systems by ensuring their design, their validation, verification and safety study, right up to their commissioning.
CLEARSY produces safe systems and software in the railway, automotive, military, space and nuclear fields.
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News
CLEARSY supports Luxtram in the development of SIL4 safety-critical automation software
10 December 2025 | Computer science
For several years, CLEARSY has been supporting the development of SIL4 safety-critical automation software for the manoeuvring areas of the […]
CLEARSY is developing a real-time platform for processing high-speed analog data
9 December 2025 | Tools
CLEARSY is developing a real-time hardware-based platform for digitising, dating and filtering high-speed analog data. This platform performs the following […]
Onboard/trackside parameterization of Paris metro line 6 validated by CLEARSY
3 December 2025 | Company
CLEARSY is assisting RATP (French Parisian metro) with the independent second review of the validation of useful parameterization data for […]
The Metropole Digital – IMD/UFRN and CLEARSY present their work at the SBMF conference from 2 to 5 December
2 December 2025 | Company
At the Brazilian conference on formal methods @SBMF 2025 (2–5 December, Recife), the @Metrópole Digital Institute – IMD/UFRN and CLEARSY […]
Successful commissioning of CLEARSY’s automatic train stop system in Corsica
27 November 2025 | Offers
On November 3, 2025, CLEARSY’s SIL2-certified KFS automatic train stop system was successfully commissioned by Mobility on the Corsican French […]
The SCK-CEN has renewed its confidence in CLEARSY’s RS4 range of safety relays
26 November 2025 | Energy/nuclear
The SCK-CEN (Centre for Nuclear Studies) has renewed its confidence in CLEARSY’s RS4 range of safety relays for the Emergency […]
Safety software and systems
All our security systems and software available below. If you have a specific problem, contact us.
operational systems
