Stimio
Stimio is a French supplier of railway Internet of Things (IoT) devices and predictive maintenance software, headquartered near Nantes and serving operators and infrastructure managers in France and Luxembourg, with an additional office in Germany.
Founded in 2014, Stimio is based in Carquefou outside Nantes, with an additional office in Germany. According to the company’s own communications, staff numbered around 30 as of 2021–2022; external business databases have since put the figure lower, in the range of 14 to 19.
Since July 2023, Stimio has been owned by CBM Group, a privately held French supplier of spare parts for buses, coaches, and trams, and trades as Stimio by CBM.
Core products
Stimio combines railway-certified, battery-powered sensing hardware with a cloud analytics platform. The Railnode device collects condition data from rolling stock and infrastructure, while the Railnet gateway connects onboard sensors and existing train equipment.
Data is processed in the Oxygen software suite, spanning Oxygen Edge for acquisition and Oxygen Cloud for storage, visualisation, and prediction. The platform applies machine learning models to forecast failures and support condition-based maintenance planning.
Typical rolling stock applications include compressors, doors, battery voltage, pneumatic circuits, and sanding systems. On the infrastructure side, the company monitors catenary tensioning, rail temperature, track geometry, and signalling cable insulation.
Market position
Stimio’s customer base is anchored in the French rail market, including SNCF, Transdev, RATP, and Keolis, alongside Luxembourg’s national operator CFL. In 2021, the company signed a five-year framework contract with SNCF Voyageurs covering the supply of connected IoT devices.
Infrastructure customers include Lisea and Mesea, the concession and maintenance companies behind the Tours–Bordeaux high-speed line, as well as Eiffage Rail Express. The company also serves the French energy sector through Enedis and Réseau de Transport d’Électricité (RTE), the national electricity transmission operator.
Stimio stated in 2021 that it had deployed more than 10,000 certified sensors across its customer base. The company has exhibited at InnoTrans in Berlin and SIFER in Lille.
Current activity
The CBM acquisition followed a commercial partnership established in 2022, combining Stimio’s condition monitoring with CBM’s spare parts distribution in a joint predictive supply chain offering. Integration into the group places the company’s rail monitoring alongside CBM’s parts business for mobility operators.
In 2022, Stimio partnered with German gearbox manufacturer GGT Gmeinder Getriebetechnik to integrate the GearSaver oil-condition sensor into its platform, extending predictive coverage to railway gearboxes.
