At the heart of innovation in network sizing and energy efficiency, Trace Software is positioned as an undisputed leader in the development of software for building and energy professionals. Our expertise covers the design of electrical and photovoltaic installations, the energy sizing of our buildings and the optimisation of an installation’s carbon footprint, marking our commitment to a more sustainable future. Trace Software was born in the early 1990s to develop Autocad applications for mechanical and electrical design offices. This is how the TR-MECA, TR-ELEC and TR-PATRIM applications were born, which were the genesis of TraceParts, TR-CIEL, elecworks / Solidworks Electrical, Elec Calc and Solar Calc offers. In 2015, the parent company Trace Group created the startup Green Systems to develop energy management and control solutions. A few years later, the global energy landscape has been completely turned upside down with soaring electricity prices, the decision to drive electric vehicles, the availability of energy storage technologies and the explosion of photovoltaic installations. The consequences for facility design criteria are numerous. It is therefore necessary to take into account the impacts of our installations during their full life cycle, and in particular the operating phase: controlling energy expenditure and reducing the carbon footprint. In addition to sizing, energy efficiency must be ensured and measurement, monitoring and control systems must be put in place. Electrical design is evolving towards a more global energy concept that must also take into account the territory to manage energy sharing. Thus, in 2024, the companies Trace Software International and Green Systems will merge to meet these new challenges. This new entity thus masters a complex technological chain integrating electrical installation modelling, energy modelling of the buildings (thermal, LCA, etc.), and energy efficiency (monitoring and management).