The core activity of CELSI AG is the development and implementation of software solutions with a focus on security, particularly in the areas of Smart Grid, Smart Metering and payment solutions. This also includes specific solutions such as ep2 eft/pos, CEPTEST and CelsiGuard. The company offers its customers comprehensive services, from needs analysis to the implementation of software projects, and positions itself as a software partner for companies in the energy sector and other industries that require secure connections and solutions.