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Clearsy

Designs and builds safety-critical software and systems for rail, automotive, defence, space and nuclear clients

Aix-en-Provence, FranceFounded 2000clearsy.comWebsite technologies

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Highlights

  • New on EvolcAdded 2026-10-27

About Clearsy

CLEARSY is a French company that designs, builds and certifies safety-critical software and systems at SIL1 to SIL4. Its work covers system design through commissioning, including validation, verification and safety studies. Its tools include Atelier B, a formal modelling tool, and the CLEARSY Safety Platform, and its product lines include ERTMS/ETCS and test benches.

Services include formal methods, safety analysis, homologation and certification support for software, safety demonstration, SIL-standard safety services and training. Customers are in the railway, automotive, military, space and nuclear sectors. The company cites long-running work with Alstom on automatic metro systems.

CLEARSY was founded in 2000 by the engineering team that industrialised the Atelier B tool. Its headquarters is in Aix-en-Provence, France. The company publishes job and internship openings.

Product: Safety-critical software and systems engineering, including the Atelier B formal modelling tool, CLEARSY Safety Platform, ERTMS/ETCS products and safety certification services.

Public tenders won

3 tenders won since 1 Jan 2024 from 3 public buyers in France, worth €15.2M as awarded. From EU award notices (TED) that name Clearsy by its registry number.

  • 20 Aug 2026 Régie Ligne d'Azur (06) · Fourniture de pièces de rechange pour le système DAAT (Dispositif d’Arrêt Automatique des Trains) de la ligne 2 de la Régie Lignes d’Azur. · €800k notice
  • 20 May 2026 SNCF RESEAU · Accord-Cadre Activité de sureté de fonctionnement notice
  • 5 Mar 2024 RATP · Accords-cadres relatifs à la Sûreté de Fonctionnement (SdF) · €14.4M notice

Open tenders like these →

Jobs at Clearsy

No open positions listed right now.

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Website technologies

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