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 at the ERTMS 2026 conference in Valenciennes
18 March 2026 | ERTMS
CLEARSY is a leading provider of simulation and testing tools compliant with ERTMS standards, not only for Baseline 3 but […]
Modernising nuclear control and command systems: CLEARSY and D3E at work at the CEA in Marcoule
12 March 2026 | Energy/nuclear
CLEARSY is assisting the CEA Marcoule in modernising the control system for the Basic Nuclear Installation (INB): Multipurpose Intermediate Storage […]
CLEARSY is a partner of the ENSIIE engineering school
10 March 2026 | Company
For the third consecutive year, CLEARSY is participating in a comprehensive 42-hour course at the ENSIIE engineering school dedicated to […]
An innovative cyber security module for the safe computer: CLEARSY Safety Platform
5 March 2026 | Component
CLEARSY is expanding its range of CLEARSY Safety Platform modules with a cyber-resilient communication module. The CLEARSY Safety Platform is […]
CLEARSY at the Fourth International Summer School on Robotic Mission Engineering (RoME) 2026
24 February 2026 | R&D
CLEARSY is attending the 4th edition of the RoME 2026 (Robotic Mission Engineering) international summer school from 23 to 27 […]
CLEARSY delivers on-board display consoles outside Europe
17 February 2026 | Component
CLEARSY has supplied a prototype display console for trains (Driver Machine Interface – DMI) to its industrial partner as part […]
Safety software and systems
All our security systems and software available below. If you have a specific problem, contact us.
operational systems
