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
The new reference SIL4 safety system development platform
5 March 2025 | R&D
CLEARSY presents the CLEARSY SAFETY CONTROLLER, a SIL4 ready safety controller based on the CLEARSY SAFETY PLATFORM, which has been […]
CLEARSY’s ETCS simulation tool in use in Germany
26 February 2025 | Component
Two European Train Control System (ETCS) laboratories have been in use since 2024 in Germany, in Munich and Dresden, by […]
A world first: system safety reasoning is T2 EN50129 SIL4 formally proven
19 February 2025 | Computer science
The activity of formal system proof consists in mathematically expressing the global properties by which system safety is guaranteed, and […]
New Lausanne T1 tramway interlocking made by CLEARSY
11 February 2025 | Railway
CLEARSY is actively involved in the T1 tramway project, which will connect Lausanne to Renens in 2026, bringing its expertise […]
A new CLEARSY system based on its SIL4 safety platform
11 February 2025 | Component
CLEARSY has designed a platform screen door control system for the Brisbane Metro, an evolution of the DOF system initially […]
CLEARSY’s automatic train stop system is certified to SIL2 safety level
22 January 2025 | Offers
CLEARSY’s DAAT SIL2 Automatic Train Stop system is SIL2 certified by Bureau Veritas for the Corsican Railways rolling stock renovation […]
Safety software and systems
All our security systems and software available below. If you have a specific problem, contact us.
operational systems
