XAP. is industry software for the energy and water sector from Somentec. Its XAP.lieferant module supports energy suppliers, municipal utilities and multi-utility companies with billing, the allocation of consumption and costs, and market communication. The package covers billing of different media, flexible tariffs and products, automated switching processes for the market roles of supplier, grid operator and metering operator, integrated customer management, a sub-ledger with receivables management, statistics and reporting. Separate variants exist for grid operators, water and wastewater companies, heat and heating-cost billing.
XAP. is developed by Somentec Software GmbH in Langen, Germany, with an office in Dresden. In 2025 Somentec announced that Altamount Software GmbH, a platform of CHAPTERS Group AG, took over the shares held by a German municipal utility; the group's country and the size of the stake are not stated. The delivery model and hosting location are not stated on the vendor's public pages, so ask the vendor before you decide.